E430 Air Conditioning Issue(s)
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2001 E430 Base
E430 Air Conditioning Issue(s)
I have a 2001 E430 with an intermittent air conditioning problem. From what I have read, it is best to post the values that the control unit is displaying:
Engine Cold (no ignition)
1. 80
2. 80
3. 89
4. 89
5. 87
6. 85
7. 08
8. 80
9. 27
Engine Cold (Engine Running)
1. 80
2. 80
3. 89
4. 89
5. 87
6. 87
7. 06
8. 82
9. 35
Engine Hot (Engine Running)
1. 87
2. 82
3. 89
4. 89
5. 87
6. 175
7. 20
9. 82
The values posted are with the a/c system not pushing out cold air at all.
Today, the a/c control unit did not display any trouble codes. However, two weeks ago (for the first time), the EC light came on and stayed on until I stopped the car. When I pulled the codes it revealed an EB1227, EB1231, and EB1241.
It also seems that I have to manually turn on the aux fan by pressing down the Auto buttons at the same time. That aux fan does not come on automatically.
When the a/c does work, it does pump out nice cold air.
Can anyone give me any indication of what the problem might be?
I suspect that I have a bad "Pressure Sensor" and potentially a bad "Aux Fan Controller".
Thanks,
Marc
Engine Cold (no ignition)
1. 80
2. 80
3. 89
4. 89
5. 87
6. 85
7. 08
8. 80
9. 27
Engine Cold (Engine Running)
1. 80
2. 80
3. 89
4. 89
5. 87
6. 87
7. 06
8. 82
9. 35
Engine Hot (Engine Running)
1. 87
2. 82
3. 89
4. 89
5. 87
6. 175
7. 20
9. 82
The values posted are with the a/c system not pushing out cold air at all.
Today, the a/c control unit did not display any trouble codes. However, two weeks ago (for the first time), the EC light came on and stayed on until I stopped the car. When I pulled the codes it revealed an EB1227, EB1231, and EB1241.
It also seems that I have to manually turn on the aux fan by pressing down the Auto buttons at the same time. That aux fan does not come on automatically.
When the a/c does work, it does pump out nice cold air.
Can anyone give me any indication of what the problem might be?
I suspect that I have a bad "Pressure Sensor" and potentially a bad "Aux Fan Controller".
Thanks,
Marc
Thread Starter
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Joined: Aug 2017
Posts: 17
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2001 E430 Base
Plutoe,
Thanks for the response, I definitely appreciate it. I will go ahead and run over to one of the auto parts stores and check pressures.
I accidentally left 8 off while hot, but that reading is 82 with engine running.
Thanks for the response, I definitely appreciate it. I will go ahead and run over to one of the auto parts stores and check pressures.
I accidentally left 8 off while hot, but that reading is 82 with engine running.
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From: V E G A S
1922 Ford Model T / no OBD
20 bars of compression indicate that your system works, but something is cutting it off.
Your hot cabin temperatures are almost the same what cold values, so do 1 more test when entering car park in hot sun. Read the values before engine start, than leave #7 on display and start the engine seeing how the value changes for next couple of minutes.
Your hot cabin temperatures are almost the same what cold values, so do 1 more test when entering car park in hot sun. Read the values before engine start, than leave #7 on display and start the engine seeing how the value changes for next couple of minutes.
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2001 E430 Base
Katjtek1,
Thank you as well for responding. I just ran the test as you asked, here are the values:
Car Parked in Hot Sun (Engine NOT Running):
1. 96
2. 94
3. 94
4. 94
5. 94
6. 118
7. 07
8. 93
9. 27
Car Running (Aux Fan Not Running)
1. 103
2. 100
3. 105
4. 107
5. 105
6. 190
7. 08 to 09
8. 120
9. 27
I then went ahead and turned the Aux Fan on manually by pressing the two Auto Buttons, here are those values:
-Everything was the same with the exception of the #7 reading which went up to 20
I then shut the car off and took more readings with the car not running:
-The only value that changed was #7 and it went to 10
Thank you as well for responding. I just ran the test as you asked, here are the values:
Car Parked in Hot Sun (Engine NOT Running):
1. 96
2. 94
3. 94
4. 94
5. 94
6. 118
7. 07
8. 93
9. 27
Car Running (Aux Fan Not Running)
1. 103
2. 100
3. 105
4. 107
5. 105
6. 190
7. 08 to 09
8. 120
9. 27
I then went ahead and turned the Aux Fan on manually by pressing the two Auto Buttons, here are those values:
-Everything was the same with the exception of the #7 reading which went up to 20
I then shut the car off and took more readings with the car not running:
-The only value that changed was #7 and it went to 10
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From: V E G A S
1922 Ford Model T / no OBD
Any codes? You have software issue as you smartly confirmed with overriding fans manually.
Would you keep the car in override, the 20 bars of refrigerant has to cool down the car, but it will take couple of minutes.
Would you keep the car in override, the 20 bars of refrigerant has to cool down the car, but it will take couple of minutes.
Last edited by kajtek1; Jul 18, 2018 at 05:07 PM.
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From: V E G A S
1922 Ford Model T / no OBD
Electronic controls is what I hate as you can't troubleshoot them easy way.
I would try the old-fashion way of resetting by disconnecting the battery for few minutes.
What still makes me wonder how-come your park car shows almost the same temperature inside and out. Usually cabin get very hot when sitting on sun.
I would try the old-fashion way of resetting by disconnecting the battery for few minutes.
What still makes me wonder how-come your park car shows almost the same temperature inside and out. Usually cabin get very hot when sitting on sun.
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Thread Starter
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2001 E430 Base
I left the windows open while I was doing this. It's 106 here in North Texas today! Unbearably hot...
Do you think I should just go ahead and replace the two sensors; Refrigerant Pressure and Temperature Sensor at the Receiver/Drier? I already have the pressure sensor.
I am going to try to attempt to do the high and low side pressure readings in the morning. I did get a set of pressure gauges this afternoon at the auto parts store.
This whole problem really does act like it's an electric/sensor issue. As a side note, I have already replaced the Engine Coolant Temperature sensor and the Evaporator Temp Sensor. I think the Refrigerant Temp and Pressure sensors are the last two that I have not replaced.
Do you think I should just go ahead and replace the two sensors; Refrigerant Pressure and Temperature Sensor at the Receiver/Drier? I already have the pressure sensor.
I am going to try to attempt to do the high and low side pressure readings in the morning. I did get a set of pressure gauges this afternoon at the auto parts store.
This whole problem really does act like it's an electric/sensor issue. As a side note, I have already replaced the Engine Coolant Temperature sensor and the Evaporator Temp Sensor. I think the Refrigerant Temp and Pressure sensors are the last two that I have not replaced.
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From: V E G A S
1922 Ford Model T / no OBD
Your sensor calibration looks good so far and yes, the morning check can give it one more confirmation.
I think opening pressurized system should be the last resort.
As I said, I am not good in electronics, but knowing how cheap W210 parts are, I would be tempted to buy replacement climatronic on ebay.
I think opening pressurized system should be the last resort.
As I said, I am not good in electronics, but knowing how cheap W210 parts are, I would be tempted to buy replacement climatronic on ebay.
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2001 E430 Base
I was able to get some gauges and check the low side and high side pressurization:
Car Off:
Low Side: 100 Psi
High Side: 100 Psi
Car On and A/C On
Low Side 80 Psi without Aux Fan On, 77 with Aux Fan On. Otherwise Pressures stayed the same, they were stable
High Side: 100 Psi
Also took some more readings from inside the cabin:
Cold (Car Not On)
1. 84
2. 85
3. 91
4. 91
5. 91
6. 85
7. 06
8 84
9. 27
Car On (No Aux Fan On)
1. 84
2. 85
3. 93
4. 93
5. 91
6. 123
7. 07
8. 85
9. 33
Car On (Aux Fan On by Depressing two Auto Buttons)
1. 84
2. 85
3. 93
4. 93
5. 91
6. 132
7. 20
8. 85
9. 33
Car Off:
Low Side: 100 Psi
High Side: 100 Psi
Car On and A/C On
Low Side 80 Psi without Aux Fan On, 77 with Aux Fan On. Otherwise Pressures stayed the same, they were stable
High Side: 100 Psi
Also took some more readings from inside the cabin:
Cold (Car Not On)
1. 84
2. 85
3. 91
4. 91
5. 91
6. 85
7. 06
8 84
9. 27
Car On (No Aux Fan On)
1. 84
2. 85
3. 93
4. 93
5. 91
6. 123
7. 07
8. 85
9. 33
Car On (Aux Fan On by Depressing two Auto Buttons)
1. 84
2. 85
3. 93
4. 93
5. 91
6. 132
7. 20
8. 85
9. 33
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1922 Ford Model T / no OBD
20 bars = 300 psi, so was the 100 psi on gauge read at the same time?
With variable output compressor those values change in just seconds, that is why it takes persistence to fully troubleshoot it.
As I said above, observing pressure #7 after starting the compressor for couple of minutes would give some answers.
With variable output compressor those values change in just seconds, that is why it takes persistence to fully troubleshoot it.
As I said above, observing pressure #7 after starting the compressor for couple of minutes would give some answers.
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1922 Ford Model T / no OBD
I would double check it, but looks like your pressure sensor is giving false readouts. Never have heard about such failure, so even triple checking would not be too much.
You will have to empty the system for sensor replacement.
You will have to empty the system for sensor replacement.
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2001 E430 Base
Magically, on the way to shop to get system recharged, the air conditioner started to blow cold.
I took new readings as I was driving:
1. 93
2. 103
3. 53
4. 53
5. 49
6. 190
7. 14-15
8. 127
9. 42
I am going to go ahead and replace the sensor while the system is empty.
My other thought is that I have a sticky expansion valve.
I took new readings as I was driving:
1. 93
2. 103
3. 53
4. 53
5. 49
6. 190
7. 14-15
8. 127
9. 42
I am going to go ahead and replace the sensor while the system is empty.
My other thought is that I have a sticky expansion valve.
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From: V E G A S
1922 Ford Model T / no OBD
Expansion valve has a filter in front of it, so since you will drain the system, getting new one would be good idea.
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2001 E430 Base
I agree that replacing the filter would be a good idea. Unfortunately, I will not be able to do it at the shop I am at. I did go ahead and replace refrigerant pressure sensor and had system emptied, vacuumed and currently being recharged. They sis say that 1.5 lbs of refrigerant was drawn out at the start of this process.
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2001 E430 Base
On the way home the a/c worked well after replacing the pressure sensor and vacuuming the old refrigerant out and replacing it. Crossing my fingers that I have found the issue but will know more in the coming days.
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2001 E430 Base
Well, unfortunately my replacement of the pressure sensor and vacuuming out the system did not work. The a/c system is still shutting off randomly and coming on randomly as well. Do you think I should replace the expansion valve, could that be the culprit?
So far I have done the following:
1. Replaced Engine Coolant Temp Sensor
2. Replaced Pressure Sensor (cleaned out and vacuumed system)
3. Replaced Evaporator Temp Sensor
So far I have done the following:
1. Replaced Engine Coolant Temp Sensor
2. Replaced Pressure Sensor (cleaned out and vacuumed system)
3. Replaced Evaporator Temp Sensor
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1922 Ford Model T / no OBD
Look like a member on twin forum did troubleshooting.
With such data you can analyze the system.
https://docs.google.com/spreadsheets...vvreXSSD8/edit
With such data you can analyze the system.
https://docs.google.com/spreadsheets...vvreXSSD8/edit
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2001 E430 Base
I am not sure how I can attach another type of file. Maybe I need to make a new document in Google docs.
As an update, I went ahead and replaced the Expansion Valve this morning and had the system recharged. So far, so good. I got really cold air all the way home.
I think there is also a bit of good news on the compressor as well, I did not see any metal shavings in the expansion valve when I removed it. Will keep you posted on if it stays cool!
As an update, I went ahead and replaced the Expansion Valve this morning and had the system recharged. So far, so good. I got really cold air all the way home.
I think there is also a bit of good news on the compressor as well, I did not see any metal shavings in the expansion valve when I removed it. Will keep you posted on if it stays cool!
