AC Problem - refrigerant pressure
Thread Starter
Member
Joined: Jun 2008
Posts: 132
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From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
AC Problem - refrigerant pressure
i read this forum often, but i just registered recently
i have an '03 c240 and my AC blows cold only when i am driving and is cooler when i am not facing the sun.
the dealer said it was my freon my last checkup before my warranty was out =/
but that was during the fall, and now it is summer and i am dying.
do you think it is the condenser fan or the compressor?
or any other ideas?
thanks alot for any help
i have an '03 c240 and my AC blows cold only when i am driving and is cooler when i am not facing the sun.
the dealer said it was my freon my last checkup before my warranty was out =/
but that was during the fall, and now it is summer and i am dying.
do you think it is the condenser fan or the compressor?
or any other ideas?
thanks alot for any help
Thread Starter
Member
Joined: Jun 2008
Posts: 132
Likes: 1
From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
Thread Starter
Member
Joined: Jun 2008
Posts: 132
Likes: 1
From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
bump for summer coming back into play, and i sold my civic so this is now my only mode of transportation.
same deal, AC works while car is driving without stops (such as being on the freeway)
also realised in the shade the ac works better ..
fyi my stepper motor is out as well, but even last year when it was working i felt the heat
any suggestions besides asking dealer to bend me over?.. im melting
thanks in advance
same deal, AC works while car is driving without stops (such as being on the freeway)
also realised in the shade the ac works better ..
fyi my stepper motor is out as well, but even last year when it was working i felt the heat
any suggestions besides asking dealer to bend me over?.. im melting
thanks in advance
Member
Joined: Dec 2006
Posts: 118
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From: Casa Grande, Arizona
2005 c230k
I would think it is a weak or dead cooling fan. Since the air blows cold when you are moving, it seems like the AC compressor is working. There is a relay that turns up the fan speed, when needed, so that may not be working also.
Also. was the refrigerant level corrected? This would cause problems, too.
Also. was the refrigerant level corrected? This would cause problems, too.
Last edited by dnlow; Mar 19, 2009 at 04:38 PM.
Thread Starter
Member
Joined: Jun 2008
Posts: 132
Likes: 1
From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
thanks, the refrigerant level was corrected. do you know what the relay is called? i will have that checked this week.
and there is only one fan correct?
and there is only one fan correct?
I would think it is a weak or dead cooling fan. Since the air blows cold when you are moving, it seems like the AC compressor is working. There is a relay that turns up the fan speed, when needed, so that may not be working also.
Also. was the refrigerant level corrected? This would cause problems, too.
Also. was the refrigerant level corrected? This would cause problems, too.
Member
Joined: Dec 2006
Posts: 118
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From: Casa Grande, Arizona
2005 c230k
the c230 only has one. I am not sure about the c240. I do not know what the relay is called , but since the fan is multi-speed I am assuming there is one. If I had an electrical schematic for your car I could figure it out right away. Sorry I can not be of more help.
All I can say is that I am almost sure there is some issue with the fan. The refrigerant needs air moving across it to remove the heat that is in the refrigerant. No fan, no air movement across AC coils, no cooling.
Good luck.
All I can say is that I am almost sure there is some issue with the fan. The refrigerant needs air moving across it to remove the heat that is in the refrigerant. No fan, no air movement across AC coils, no cooling.
Good luck.
Last edited by dnlow; Mar 20, 2009 at 12:01 AM.
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My C230 has a leak, so I lose about 40% of the freon. I am taking mine to a shop tomorrow to check if the added dye has helped at all. How long does that dye typically last for?
Right now the AC is working, as I had the EC Rest button reset and a full recharge, but the shop did not find the leak - said they had to put the dye in. I hope that helps~!
I also have the stepper issue for the left foot well.
Right now the AC is working, as I had the EC Rest button reset and a full recharge, but the shop did not find the leak - said they had to put the dye in. I hope that helps~!
I also have the stepper issue for the left foot well.
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Joined: Sep 2006
Posts: 296
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From: FLORIDA
2003 C240
i read this forum often, but i just registered recently
i have an '03 c240 and my AC blows cold only when i am driving and is cooler when i am not facing the sun.
the dealer said it was my freon my last checkup before my warranty was out =/
but that was during the fall, and now it is summer and i am dying.
do you think it is the condenser fan or the compressor?
or any other ideas?
thanks alot for any help
i have an '03 c240 and my AC blows cold only when i am driving and is cooler when i am not facing the sun.
the dealer said it was my freon my last checkup before my warranty was out =/
but that was during the fall, and now it is summer and i am dying.
do you think it is the condenser fan or the compressor?
or any other ideas?
thanks alot for any help
It takes forever to cool even after a ref refill.
Thread Starter
Member
Joined: Jun 2008
Posts: 132
Likes: 1
From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
getting it diagnosed tomorrow morning at the stealer.. been driving around my civic i got back from a non paying buyer on the hotter days. heh
i will let you know what they say, easy way to tell it is the fan.. is if your car does not sound like an airplane anymore
Super Member
Joined: Jan 2008
Posts: 518
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From: Orange County, CA
E350
My C230 has a leak, so I lose about 40% of the freon. I am taking mine to a shop tomorrow to check if the added dye has helped at all. How long does that dye typically last for?
Right now the AC is working, as I had the EC Rest button reset and a full recharge, but the shop did not find the leak - said they had to put the dye in. I hope that helps~!
I also have the stepper issue for the left foot well.
Right now the AC is working, as I had the EC Rest button reset and a full recharge, but the shop did not find the leak - said they had to put the dye in. I hope that helps~!
I also have the stepper issue for the left foot well.
I just had my 2002 C240 AC System refilled with Freon a month ago. Symptoms of low freon included: AC blowing hot (or not as cold as it should be) air all the time, and hearing the compressor (or some kind of pump) keep trying to initiate all the time. After the refill, AC is blowing ice-cold air, and the compressor/pump sound went away.
According to my SA, it's "normal" for Freon to need to be refilled after 7 years, and this was a "maintainence item"... but it is NOT checked nor done on any Service A or B. It's apparently only checked/done if the owner complains. IMO if it's considered a "maintainence item", then it should be routinely checked (either at Service A or B)... why the heck wouldn't it be checked?!?
Last edited by chokaay; Jun 19, 2009 at 05:26 AM.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
These cars have a refrigerant pressure sensor. If all the 134a is gone the aircon will refuse to switch on. I you still have a partial refrigerant charge it can give the symptoms you describe.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
See this:
https://mbworld.org/forums/c-class-w...on-always.html
Are you absolutely sure you don't have a refrigerant leak. You have to sort that out first! - or you can't diagnose anything else properly.
https://mbworld.org/forums/c-class-w...on-always.html
Are you absolutely sure you don't have a refrigerant leak. You have to sort that out first! - or you can't diagnose anything else properly.
Last edited by Glyn M Ruck; Jun 19, 2009 at 07:58 AM.
Thread Starter
Member
Joined: Jun 2008
Posts: 132
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From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
my SA informed me that my fan was only blowing at 20% due to a faulty regulator, went on to inform me that the fan assembly only comes as a whole, so i agreed to replace it (a $500 part) . after two hours i checked in, they installed the new fan assembly only to get my fan up to 40%, he continued on to say the compressor was only working at 70% as well (irrelevant imo) so my car will remain with them until monday, hopefully they find out why else the fan would not be going up to normal levels.
only upside is i get a c350 for 4 days.
only upside is i get a c350 for 4 days.
Thread Starter
Member
Joined: Jun 2008
Posts: 132
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From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
ya, it is troublesome when you are in desperation and they seem like they know know what they are talking about.. i do hope they solve whatever it is. any way i can get them to fix the true problem for free if the fan was not the issue? anyone ever have luck with that?
Thread Starter
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Joined: Jun 2008
Posts: 132
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From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
ok, the SA called me and informed me that the fans are running at 70% and the compressor is running at 70% giving about 53° when it should be at least 40°.. the foreman says that the fans are listening to the compressor and will only run up to the 70%, but they also say the fans just randomly cut out.. they are saying that if they replace the compressor and expansion valve (mucho dinero) everything 'should' work at 100%
thoughts? any other reasons the aux fans will not be running at 100% ?
thanks in advnace
thoughts? any other reasons the aux fans will not be running at 100% ?
thanks in advnace
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
I'm no aircon specialist but there is some logic to what they are saying if the system is fully gassed - I don't know about why the expansion valve needs replacing but if the compressor is not up to snuff then you will be dissipating less heat across the condensor so the fans do not require to run flat out & are sensing correctly.
What mileage has the vehicle done? This is a very rough guide because aircons/ compressors that are used regularly usually last longer than those that are not.
What mileage has the vehicle done? This is a very rough guide because aircons/ compressors that are used regularly usually last longer than those that are not.
Thread Starter
Member
Joined: Jun 2008
Posts: 132
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From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
I'm no aircon specialist but there is some logic to what they are saying if the system is fully gassed - I don't know about why the expansion valve needs replacing but if the compressor is not up to snuff then you will be dissipating less heat across the condensor so the fans do not require to run flat out & are sensing correctly.
What mileage has the vehicle done? This is a very rough guide because aircons/ compressors that are used regularly usually last longer than those that are not.
What mileage has the vehicle done? This is a very rough guide because aircons/ compressors that are used regularly usually last longer than those that are not.
i just do not get how the fans were running at 20% then the new ones were running at 70%, but they say it may not be the fans
thanks for your help
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Have they replaced the fans??? - I doubt there is anything wrong with the fans. At that mileage a compressor replacement is reasonable - it's not a long way for the engine but it is for the compressor.
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From: Arizona
1999 Civic Hatchback, 2002 c240, 2003 CLK 500
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From: Royal Oak, Michigan
Moped
i have the same problem with bbrain. cold when running and tends to heat up when standing still.. also sometimes (i always use the auto button) the ac turns off by itself. i press auto again to turn it on but after 10 secs it shuts off again. but sometimes just stays on. i thought it was a temp thing like the car feels like its cold enough thats why it turns off.. is this an issue i should be concerned with? or is it normal?
Super Moderator
Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
i have the same problem with bbrain. cold when running and tends to heat up when standing still.. also sometimes (i always use the auto button) the ac turns off by itself. i press auto again to turn it on but after 10 secs it shuts off again. but sometimes just stays on. i thought it was a temp thing like the car feels like its cold enough thats why it turns off.. is this an issue i should be concerned with? or is it normal?
