Early W210 Blower Motor Regulator Replacement DIY Here...
Senior Member
Joined: Mar 2011
Posts: 435
Likes: 8
From: Mizzou
1998 C43 AMG
Ordered my replacement regulator from Autohausaz. Purchased the BEHR unit for about $106. Installed it this last weekend and fixed my problem (no blower at all on ac or heat).
Some tips:
Installation was very easy, just a philips-head screwdriver and a #20 Torx bit. I had to re-use the red wire from the OEM unit since the replacement wire was too short. No problemo.
Helps to have some compressed air to blow all the dirt/leaves out of the old fan unit. I used one of those desktop can units.
Purchase a replacement cabin air filter at the same time. It's in the same spot so save yourself the extra labour and get it done all at once.
It's nice to have a vacuum handy to clean up all the trash that is stuck in the blower unit.
Some tips:
Installation was very easy, just a philips-head screwdriver and a #20 Torx bit. I had to re-use the red wire from the OEM unit since the replacement wire was too short. No problemo.
Helps to have some compressed air to blow all the dirt/leaves out of the old fan unit. I used one of those desktop can units.
Purchase a replacement cabin air filter at the same time. It's in the same spot so save yourself the extra labour and get it done all at once.
It's nice to have a vacuum handy to clean up all the trash that is stuck in the blower unit.
Senior Member
Joined: Jan 2005
Posts: 355
Likes: 3
2007 S-550, 2001 E-430 & 1997 E-420
Thank you Tony.
Thank you Tony. Today I did DIY of blower motor regulator on my 1997 E-420. My blower was blowing at lower speed for last 2 weeks. Now it is working great.
While I was doing this, I also did cabin filter DIY per benzworld.org.
Thanks all for great job here. You save me lots of $$$$.
While I was doing this, I also did cabin filter DIY per benzworld.org.
Thanks all for great job here. You save me lots of $$$$.
Newbie
Joined: Dec 2010
Posts: 6
Likes: 0
From: Ontario, Canada
1997 E320, 1998 CLK 320
Ground the negative lead coming off the motor. The thick, blue wire. The motor should start. You can also remove the motor from the car, and directly attach it to the positive battery terminal under the hood, and the car's chassis. If the motor starts, then you know your regulator is bad.
Junior Member
Joined: Dec 2010
Posts: 25
Likes: 0
From: Phoenix (Mesa) Arizona, USA
1999 E430 Sedan
THIS TECHNIQUE WILL NOT WORK ON 1999 PRE-FACELIFT E430
If you have a 1999 E430 (pre-facelift) that has the "newer" fan motor (plastic frame) -
THIS TECHNIQUE WILL NOT WORK !!!
DO NOT ORDER THE PART !!! I DID, AND WASTED $165.00 USD
(based on all of the responses here on this thread) !!!!
I ordered the SAME part everyone is raving about - without seeing if it would have worked on MY E430..... Guess what?
IT DOES NOT FIT - NOR CAN I FIGURE OUT HOW TO MAKE IT WORK !!!!!
Here's what I have:
front view
rear view
Here's what I ORDERED - BASED ON ALL OF THE GLOWING FEEDBACK ON THIS THREAD...... the S-Class Blower Motor Regulator
front view
rear view
My Climate Control Unit is missing part of the "F" on the far right side of the screen
My AC starts when I star the car - the AC runs for about 45 seconds to 2 minutes, then totally stops - no cool, no fan activity - nadda !!!!
The AC system starts and stops with no rhyme or reason - sometimes, when I signal for a "left turn" - the system will start up and run for a minute and a half, the it dies again - nice ice cold air when it does run - it's just right now i PHX - this is NOT FUN !!!!!!
I have posted my problem on a separate post here on this W210 forum with lots of views, but only one response.....
Sorry for "copping an attitude" - BUT..... I expected SOMEBODY to be able to help me with this - SURELY - SOMEONE HAS HAD THIS SAME SITUATION ????
CAN ANYONE HELP ME????????
P L E A S E ???????
THIS TECHNIQUE WILL NOT WORK !!!
DO NOT ORDER THE PART !!! I DID, AND WASTED $165.00 USD
(based on all of the responses here on this thread) !!!!
I ordered the SAME part everyone is raving about - without seeing if it would have worked on MY E430..... Guess what?
IT DOES NOT FIT - NOR CAN I FIGURE OUT HOW TO MAKE IT WORK !!!!!
Here's what I have:
front view
rear view
Here's what I ORDERED - BASED ON ALL OF THE GLOWING FEEDBACK ON THIS THREAD...... the S-Class Blower Motor Regulator
front view
rear view
My Climate Control Unit is missing part of the "F" on the far right side of the screen
My AC starts when I star the car - the AC runs for about 45 seconds to 2 minutes, then totally stops - no cool, no fan activity - nadda !!!!
The AC system starts and stops with no rhyme or reason - sometimes, when I signal for a "left turn" - the system will start up and run for a minute and a half, the it dies again - nice ice cold air when it does run - it's just right now i PHX - this is NOT FUN !!!!!!
I have posted my problem on a separate post here on this W210 forum with lots of views, but only one response.....
Sorry for "copping an attitude" - BUT..... I expected SOMEBODY to be able to help me with this - SURELY - SOMEONE HAS HAD THIS SAME SITUATION ????
CAN ANYONE HELP ME????????
P L E A S E ???????
Junior Member
Joined: Dec 2010
Posts: 25
Likes: 0
From: Phoenix (Mesa) Arizona, USA
1999 E430 Sedan
UPDATE - I replaced the Climate Control Unit at lunch time, and the problem still remains.....
Going to replace the sun sensor next.....
ANYONE ELSE HAVE ANY IDEAS AS TO WHAT MAKING ME CRAZY WITH MY E430's AC SYSTEM ????????
Going to replace the sun sensor next.....
ANYONE ELSE HAVE ANY IDEAS AS TO WHAT MAKING ME CRAZY WITH MY E430's AC SYSTEM ????????
Newbie
Joined: Dec 2010
Posts: 6
Likes: 0
From: Ontario, Canada
1997 E320, 1998 CLK 320
Edit: I didn't read the last bit in your previous post. I'm totally stumped. Perhaps someone has some wiring diagrams for the climate control system? That'd be extremely beneficial. I'll look tonight to see if I still have them.
Last edited by xslntx; Jul 23, 2011 at 12:04 AM.
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Junior Member
Joined: Dec 2010
Posts: 25
Likes: 0
From: Phoenix (Mesa) Arizona, USA
1999 E430 Sedan
I'm totally STUMPED TOO !!!
Xlsntx:
Thanks for your reply..... Sensing my FRUSTRATION ????
Here's an update as of 6:00AM July 23rd, 2011:
I picked up a new CCU (Climate Control Unit) and installed that - NO CHANGE
(except now I have a complete digital read out on the screen)
I ordered a replacement sun sensor from BAP in Mesa, AZ - They're good guys there, but instead of the sun sensor, the gave me the ambient temp sensor...
So....... Having NO other options on a 108 degree afternoon (yesterday) I installed that too.... NO CHANGE
THE WORST PART ABOUT THIS - Is that the car (which we love even when it's cookin our tushes) is MY WIFE'S CAR...... you know the drill on this one right?
"A Happy WIFE make for a Happy LIFE" !!!!
Anyways - We STILL have this issue with the AC - Ya start the car up, and the AC runs finr for about 1 1/2 to 3 minutes (this varies) - then - ALL FAN and AC ACTIVITY STOPS.... NO FAN, NO COOL AIR, NO HOT AIR - NADDA-ZIP-ZILCH-BUPPKISS!!!!
Then after a few minutes (this time amount varies too) the AC & Fan magically comes on again, and runs for another couple of minutes - THEN... we go back to dead fan & AC.....
I ran a diagnostic on using the replacement CCU and here are the values I got for the first 8 values:
1 = 116
2 = 114
3 = 82
4 = 80
5 = 62
6 = 200
7 = 20
8 = 138
So........... to date = everything I have replaced is:
Blower Motor Assembly
Blower Motor Regulator
Cabin Filters
Climate Control Unit
Outside Ambient Air Temperature Sensor
I AM STUMPED !!!!! 
Thanks for your reply..... Sensing my FRUSTRATION ????
Here's an update as of 6:00AM July 23rd, 2011:
I picked up a new CCU (Climate Control Unit) and installed that - NO CHANGE
(except now I have a complete digital read out on the screen)
I ordered a replacement sun sensor from BAP in Mesa, AZ - They're good guys there, but instead of the sun sensor, the gave me the ambient temp sensor...
So....... Having NO other options on a 108 degree afternoon (yesterday) I installed that too.... NO CHANGE
THE WORST PART ABOUT THIS - Is that the car (which we love even when it's cookin our tushes) is MY WIFE'S CAR...... you know the drill on this one right?
"A Happy WIFE make for a Happy LIFE" !!!!
Anyways - We STILL have this issue with the AC - Ya start the car up, and the AC runs finr for about 1 1/2 to 3 minutes (this varies) - then - ALL FAN and AC ACTIVITY STOPS.... NO FAN, NO COOL AIR, NO HOT AIR - NADDA-ZIP-ZILCH-BUPPKISS!!!!
Then after a few minutes (this time amount varies too) the AC & Fan magically comes on again, and runs for another couple of minutes - THEN... we go back to dead fan & AC.....
I ran a diagnostic on using the replacement CCU and here are the values I got for the first 8 values:
1 = 116
2 = 114
3 = 82
4 = 80
5 = 62
6 = 200
7 = 20
8 = 138
So........... to date = everything I have replaced is:
Blower Motor Assembly
Blower Motor Regulator
Cabin Filters
Climate Control Unit
Outside Ambient Air Temperature Sensor
I AM STUMPED !!!!!
Newbie
Joined: Dec 2010
Posts: 6
Likes: 0
From: Ontario, Canada
1997 E320, 1998 CLK 320
Xlsntx:
Thanks for your reply..... Sensing my FRUSTRATION ????
Here's an update as of 6:00AM July 23rd, 2011:
I picked up a new CCU (Climate Control Unit) and installed that - NO CHANGE
(except now I have a complete digital read out on the screen)
I ordered a replacement sun sensor from BAP in Mesa, AZ - They're good guys there, but instead of the sun sensor, the gave me the ambient temp sensor...
So....... Having NO other options on a 108 degree afternoon (yesterday) I installed that too.... NO CHANGE
THE WORST PART ABOUT THIS - Is that the car (which we love even when it's cookin our tushes) is MY WIFE'S CAR...... you know the drill on this one right?
"A Happy WIFE make for a Happy LIFE" !!!!
Thanks for your reply..... Sensing my FRUSTRATION ????
Here's an update as of 6:00AM July 23rd, 2011:
I picked up a new CCU (Climate Control Unit) and installed that - NO CHANGE
(except now I have a complete digital read out on the screen)
I ordered a replacement sun sensor from BAP in Mesa, AZ - They're good guys there, but instead of the sun sensor, the gave me the ambient temp sensor...
So....... Having NO other options on a 108 degree afternoon (yesterday) I installed that too.... NO CHANGE
THE WORST PART ABOUT THIS - Is that the car (which we love even when it's cookin our tushes) is MY WIFE'S CAR...... you know the drill on this one right?
"A Happy WIFE make for a Happy LIFE" !!!!
Anyways - We STILL have this issue with the AC - Ya start the car up, and the AC runs finr for about 1 1/2 to 3 minutes (this varies) - then - ALL FAN and AC ACTIVITY STOPS.... NO FAN, NO COOL AIR, NO HOT AIR - NADDA-ZIP-ZILCH-BUPPKISS!!!!
Then after a few minutes (this time amount varies too) the AC & Fan magically comes on again, and runs for another couple of minutes - THEN... we go back to dead fan & AC.....
I ran a diagnostic on using the replacement CCU and here are the values I got for the first 8 values:
1 = 116
2 = 114
3 = 82
4 = 80
5 = 62
6 = 200
7 = 20
8 = 138
So........... to date = everything I have replaced is:
Blower Motor Assembly
Blower Motor Regulator
Cabin Filters
Climate Control Unit
Outside Ambient Air Temperature Sensor
I AM STUMPED !!!!!
Then after a few minutes (this time amount varies too) the AC & Fan magically comes on again, and runs for another couple of minutes - THEN... we go back to dead fan & AC.....
I ran a diagnostic on using the replacement CCU and here are the values I got for the first 8 values:
1 = 116
2 = 114
3 = 82
4 = 80
5 = 62
6 = 200
7 = 20
8 = 138
So........... to date = everything I have replaced is:
Blower Motor Assembly
Blower Motor Regulator
Cabin Filters
Climate Control Unit
Outside Ambient Air Temperature Sensor
I AM STUMPED !!!!!
Start the car
Temperature selector left "HI", right "LO".
Within 20 seconds, press REST and EC simultaneously for more than 5 seconds
The led in the RECIRCULATE button flashes and the display shows "di R"
Press AUTO repeatedly until all DTC's (refer to DTC table) are displayed. Record each DTC as it is displayed.
Each malfunction (short circuit, open circuit, etc.) has a specific DTC assigned to it.
The letter "E" (Error) is displayed in the left side of the display and the DTC is displayed in the right side of the display. By pressing the right AUTO button, the next DTC stored in memory will be displayed.
To erase: Only possible after all DTC's are read out. Simultaneously press both AUTO > 2 secs. "d" will be displayed in the left side of the display window and "FF" on the right side.
To cancel erase: By pressing AUTO the current faults will appear again.
Code Index:
B1226 - In-car temperature sensor (B10/4)
B1227 - Outside temperature indicator temperature sensor (B14)
B1228 - Heater core temperature (B10/1)
B1229 - Heater core temperature (B10/1)
B1230 - Evaporator temperature sensor (B10/6)
B1231 - ECT sensor (B11/4)
B1232 - Refrigerant pressure sensor (B12)
B1233 - Refrigerant temperature sensor (B12/1)
B1234 - Sun sensor (B32)
B1235 - Emissions sensor (B31)
B1241 - Refrigerant fill
B1416 - Coolant circulation pump (M13)
B1417 - Duovalve (Y21y1), left
B1418 - Duovalve (Y21y2), right
B1419 - Electromagnetic clutch (A9k1)
B1420 - Idle speed increase
B1421 - Pulse module (N65)
B1422 - Series interface (K1) connection to instrument cluster (A1)
B1423 - Switchover valve block (Y11)
B1424 - Activated charcoal filter actuator (A32m2) open
B1425 - Activated charcoal filter actuator (A32m2) closed
B1432 - Non-USA DTC
B1459 - Series interface (K2) connection to instrument cluster (A1)
Temperature selector left "HI", right "LO".
Within 20 seconds, press REST and EC simultaneously for more than 5 seconds
The led in the RECIRCULATE button flashes and the display shows "di R"
Press AUTO repeatedly until all DTC's (refer to DTC table) are displayed. Record each DTC as it is displayed.
Each malfunction (short circuit, open circuit, etc.) has a specific DTC assigned to it.
The letter "E" (Error) is displayed in the left side of the display and the DTC is displayed in the right side of the display. By pressing the right AUTO button, the next DTC stored in memory will be displayed.
To erase: Only possible after all DTC's are read out. Simultaneously press both AUTO > 2 secs. "d" will be displayed in the left side of the display window and "FF" on the right side.
To cancel erase: By pressing AUTO the current faults will appear again.
Code Index:
B1226 - In-car temperature sensor (B10/4)
B1227 - Outside temperature indicator temperature sensor (B14)
B1228 - Heater core temperature (B10/1)
B1229 - Heater core temperature (B10/1)
B1230 - Evaporator temperature sensor (B10/6)
B1231 - ECT sensor (B11/4)
B1232 - Refrigerant pressure sensor (B12)
B1233 - Refrigerant temperature sensor (B12/1)
B1234 - Sun sensor (B32)
B1235 - Emissions sensor (B31)
B1241 - Refrigerant fill
B1416 - Coolant circulation pump (M13)
B1417 - Duovalve (Y21y1), left
B1418 - Duovalve (Y21y2), right
B1419 - Electromagnetic clutch (A9k1)
B1420 - Idle speed increase
B1421 - Pulse module (N65)
B1422 - Series interface (K1) connection to instrument cluster (A1)
B1423 - Switchover valve block (Y11)
B1424 - Activated charcoal filter actuator (A32m2) open
B1425 - Activated charcoal filter actuator (A32m2) closed
B1432 - Non-USA DTC
B1459 - Series interface (K2) connection to instrument cluster (A1)
If that's the case, get a multimeter or voltage tester, and check if the blower motor is getting battery voltage on the positive lead.
Junior Member
Joined: Dec 2010
Posts: 25
Likes: 0
From: Phoenix (Mesa) Arizona, USA
1999 E430 Sedan
xslntx -
Thanks for responding Bro = you said:
"When the A/C cuts out, is it just the blower that stops? Can you see if the compressor continues to run?"
Dude - EVERYTHING AC & FAN RELATED - STOPS, then Starts back up with no reason or regular interval - today on the freeway (half an hour ago) the AC/FAN SYSTEM started and stopped around 5 times going abut 75MPH in a 10 minute span !!!!
I cant tell if the AC compressor continues to run, but ice cold air (when it DOES run) has never been the problem...
it's like somebody just stops the whole system (cold and air flow) - here's a few more clues that might help you and anyone else that's dialed into MB AC systems way more than me..
1. the air cuts on and off for no reason after the car starts up = It ALWAYS runs when we start up the car
2. as it gets hotter here in Phoenix - the fan & AC system goes on and off less (and stays off more than on) Today it's a cool 106 degrees....
3. sometimes - when the system is dead - it will cut back on for about a minute (then goes dead again) when you signal for a Left Turn... ( FOR REALS!!!!)
4. sometimes when you start off from a dead stop it will come back on again (but only for about a minute or two - then it totally dies again)
5. I bough the car used - it is missing it's cruise control stalk and controler - I haven't put a new cruise control unit back on yet, as my wife wants the AC fixed first (Um. YEAH-AH - THAT'S a NO BRAINER THIS TIME OF YEAR !!!!
)
ANy more ideas???
Thanks in Advance Bro !!!
Thanks for responding Bro = you said:
"When the A/C cuts out, is it just the blower that stops? Can you see if the compressor continues to run?"
Dude - EVERYTHING AC & FAN RELATED - STOPS, then Starts back up with no reason or regular interval - today on the freeway (half an hour ago) the AC/FAN SYSTEM started and stopped around 5 times going abut 75MPH in a 10 minute span !!!!
I cant tell if the AC compressor continues to run, but ice cold air (when it DOES run) has never been the problem...
it's like somebody just stops the whole system (cold and air flow) - here's a few more clues that might help you and anyone else that's dialed into MB AC systems way more than me..
1. the air cuts on and off for no reason after the car starts up = It ALWAYS runs when we start up the car
2. as it gets hotter here in Phoenix - the fan & AC system goes on and off less (and stays off more than on) Today it's a cool 106 degrees....
3. sometimes - when the system is dead - it will cut back on for about a minute (then goes dead again) when you signal for a Left Turn...
( FOR REALS!!!!)4. sometimes when you start off from a dead stop it will come back on again (but only for about a minute or two - then it totally dies again)
5. I bough the car used - it is missing it's cruise control stalk and controler - I haven't put a new cruise control unit back on yet, as my wife wants the AC fixed first (Um. YEAH-AH - THAT'S a NO BRAINER THIS TIME OF YEAR !!!!
)ANy more ideas???
Thanks in Advance Bro !!!
Newbie
Joined: Dec 2010
Posts: 6
Likes: 0
From: Ontario, Canada
1997 E320, 1998 CLK 320
xslntx -
Thanks for responding Bro = you said:
"When the A/C cuts out, is it just the blower that stops? Can you see if the compressor continues to run?"
Dude - EVERYTHING AC & FAN RELATED - STOPS, then Starts back up with no reason or regular interval - today on the freeway (half an hour ago) the AC/FAN SYSTEM started and stopped around 5 times going abut 75MPH in a 10 minute span !!!!
I cant tell if the AC compressor continues to run, but ice cold air (when it DOES run) has never been the problem...
it's like somebody just stops the whole system (cold and air flow) - here's a few more clues that might help you and anyone else that's dialed into MB AC systems way more than me..
1. the air cuts on and off for no reason after the car starts up = It ALWAYS runs when we start up the car
2. as it gets hotter here in Phoenix - the fan & AC system goes on and off less (and stays off more than on) Today it's a cool 106 degrees....
3. sometimes - when the system is dead - it will cut back on for about a minute (then goes dead again) when you signal for a Left Turn... ( FOR REALS!!!!)
4. sometimes when you start off from a dead stop it will come back on again (but only for about a minute or two - then it totally dies again)
5. I bough the car used - it is missing it's cruise control stalk and controler - I haven't put a new cruise control unit back on yet, as my wife wants the AC fixed first (Um. YEAH-AH - THAT'S a NO BRAINER THIS TIME OF YEAR !!!! )
ANy more ideas???
Thanks in Advance Bro !!!
Thanks for responding Bro = you said:
"When the A/C cuts out, is it just the blower that stops? Can you see if the compressor continues to run?"
Dude - EVERYTHING AC & FAN RELATED - STOPS, then Starts back up with no reason or regular interval - today on the freeway (half an hour ago) the AC/FAN SYSTEM started and stopped around 5 times going abut 75MPH in a 10 minute span !!!!
I cant tell if the AC compressor continues to run, but ice cold air (when it DOES run) has never been the problem...
it's like somebody just stops the whole system (cold and air flow) - here's a few more clues that might help you and anyone else that's dialed into MB AC systems way more than me..
1. the air cuts on and off for no reason after the car starts up = It ALWAYS runs when we start up the car
2. as it gets hotter here in Phoenix - the fan & AC system goes on and off less (and stays off more than on) Today it's a cool 106 degrees....
3. sometimes - when the system is dead - it will cut back on for about a minute (then goes dead again) when you signal for a Left Turn...
( FOR REALS!!!!)4. sometimes when you start off from a dead stop it will come back on again (but only for about a minute or two - then it totally dies again)
5. I bough the car used - it is missing it's cruise control stalk and controler - I haven't put a new cruise control unit back on yet, as my wife wants the AC fixed first (Um. YEAH-AH - THAT'S a NO BRAINER THIS TIME OF YEAR !!!!
)ANy more ideas???
Thanks in Advance Bro !!!
The image below was copied from the net, you can go ahead and ignore the text. The inner part, labeled "This Part Might Be Seized" will spin while the compressor is engaged.
If it's just the fan that's cutting out, the vents won't blow anything, unless you're driving at a decent speed with say, the sunroof tilted up. If that air remains cold, it may just be a blower issue.
Edit: This will help you locate the compressor in the engine compartment:
Last edited by xslntx; Jul 23, 2011 at 10:50 PM.
Newbie
Joined: Dec 2010
Posts: 6
Likes: 0
From: Ontario, Canada
1997 E320, 1998 CLK 320
Just went ahead and repaired my friend's blower using this method. I can't stress how important it is to make a good, solid connection, and protecting it properly. Shrink tube is almost a must. My friend's previous attempt caused electrical tape on the ground wire to melt slightly, as he cut away a lot of the copper.
Junior Member
Joined: Dec 2010
Posts: 25
Likes: 0
From: Phoenix (Mesa) Arizona, USA
1999 E430 Sedan
Dude - I do NOT have the METAL FRAMED BLOWER MOTOR ASSEMBLY ... MINE IS PLASTIC - IT IS NOT THE SAME MOTOR, and the W140 part will NOT WORK with MY situation !!!!
Newbie
Joined: Dec 2010
Posts: 6
Likes: 0
From: Ontario, Canada
1997 E320, 1998 CLK 320
I know. I should have clarified, that post was irrelevant to your situation. Have you gone ahead and run diagnostics, or checked your compressor yet?
Senior Member
Joined: Mar 2011
Posts: 435
Likes: 8
From: Mizzou
1998 C43 AMG
Azbenzrocker,
You appear to have the same blower motor assembly that I have. My car is a '98 C43 AMG, basically the same platform as your E430.
The part I ordered from azautohaus.com (your neck of the woods, btw!) is a replacement for that silver doo-hickey thingy with the spikes on it. Mine was old, crusty and covered in dust and leaves.
However, my symptoms were different than yours. My blower motor would work very weakly and not blow cold. I changed the regulator and everything came right back to life.
Your stop/start problem sounds more like a relay or corroded solder issue. But you are on the right track by replacing items. I hope you get the problem fixed, no ac in AZ must be a ***** right now!
You appear to have the same blower motor assembly that I have. My car is a '98 C43 AMG, basically the same platform as your E430.
The part I ordered from azautohaus.com (your neck of the woods, btw!) is a replacement for that silver doo-hickey thingy with the spikes on it. Mine was old, crusty and covered in dust and leaves.
However, my symptoms were different than yours. My blower motor would work very weakly and not blow cold. I changed the regulator and everything came right back to life.
Your stop/start problem sounds more like a relay or corroded solder issue. But you are on the right track by replacing items. I hope you get the problem fixed, no ac in AZ must be a ***** right now!
Junior Member
Joined: Dec 2009
Posts: 67
Likes: 0
E 63 amg
Hi guys i have a 2000 e430 that has been doing the same exact problem stated here. the a/c will be working fine and all the sudden the fan will quit working/stop the car re-sart and fan motor on occ would re-start. I change the regulator the metal piece on the side of the fan motor assembly. It ran fine for a couple of days until it stall again. WTH??? is going on. need help guys. I order the part from Autohauz.
thanks in advance
thanks in advance
Junior Member
Joined: Dec 2010
Posts: 25
Likes: 0
From: Phoenix (Mesa) Arizona, USA
1999 E430 Sedan
Here's what I finally found out when I tok my wife's 1999 E430 in to an Indie mechanic:
There was an UPDATED fan in 1999, along with an UPDATED Blower Motor Regulator - that looks a lot lke the blower motor regulator with the zinc fins that I originally got -
The one on the RIGHT is the UPDATED BLOWER MOTOR REGULATOR.... (the one I was supposed to have in the first place
The one on the LEFT - is that one that came with the car (purchased used in December of 2010)
Once I installed the correct blower motor regulator (the one on the RIGHT) the fan worked fine......
Problem solved..... for MY situation
Best
kevin
There was an UPDATED fan in 1999, along with an UPDATED Blower Motor Regulator - that looks a lot lke the blower motor regulator with the zinc fins that I originally got -
The one on the RIGHT is the UPDATED BLOWER MOTOR REGULATOR.... (the one I was supposed to have in the first place
The one on the LEFT - is that one that came with the car (purchased used in December of 2010)
Once I installed the correct blower motor regulator (the one on the RIGHT) the fan worked fine......
Problem solved..... for MY situation
Best
kevin
Newbie
Joined: Apr 2011
Posts: 2
Likes: 0
E300
Early fan, wont blow when ambient temp over 75F
1999 e300 turbo. Fan is the early version, with the metal frame.
When under 75 deg F, the blower works just fine, with the speed adjusting automatically or manually. Heater blows hot, AC blows cold. When outside temp is over 75 and the interior of the car is hot, the blower will not function. The fan speed bars will increase automatically as expected, with no output. When I drive, I can feel a little cold air coming out of the appropriate vents, and then after 3-5 minutes the blower suddenly comes on (sometimes seems associated with going over a bump). The blower speed then works fine at all settings, and the blower will keep working until the engine is turned off. Then the cycle starts all over again (3-5 minute delay while driving).
I have pulled the fan apart, looking for loose connections, but none found, and nothing improved.
The blower symptoms don't seem quite the same as other folks have reported, and I'm reluctant to blindly replace the blower control unit. Suggestions?
When under 75 deg F, the blower works just fine, with the speed adjusting automatically or manually. Heater blows hot, AC blows cold. When outside temp is over 75 and the interior of the car is hot, the blower will not function. The fan speed bars will increase automatically as expected, with no output. When I drive, I can feel a little cold air coming out of the appropriate vents, and then after 3-5 minutes the blower suddenly comes on (sometimes seems associated with going over a bump). The blower speed then works fine at all settings, and the blower will keep working until the engine is turned off. Then the cycle starts all over again (3-5 minute delay while driving).
I have pulled the fan apart, looking for loose connections, but none found, and nothing improved.
The blower symptoms don't seem quite the same as other folks have reported, and I'm reluctant to blindly replace the blower control unit. Suggestions?
Member
Joined: Jun 2011
Posts: 75
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From: Corpus Christi, TX
1998 E320 4-Matic Wagon
I have tried the search function and I didn't find my situation. "98 E320 4-matic wagon. The first hint of trouble was about a month ago when the climate control display would not light up. At first I tapped it and it came back on. That worked for a couple of days but no lights since then. I thought no big deal. Then 5 days ago, I started the car and no blower motor. After about 3 minutes the blower came on by itself. Today I go to run an errand and no blower motor and it never came on after a 15 minute drive. The A/C complerssor is working and the lines are cold. When you turn the A/C on and off you can hear the doors opening and closing. I pulled the climate control unit out of the dash and the connections seem good. BTW, before today, the blower performed properly for all fan speeds. Suggestions? Thanks in advance.
