AC not cold
Thread Starter
Junior Member
Joined: Jan 2008
Posts: 39
Likes: 1
2005 C230K sport
AC not cold
I've read quite a few AC threads, but couldn't find one that sounds like my problem. most deal with the stepper motor problem.
anyhow, my wife's 05 230K doesn't ever get cold when you turn on the AC. the fan blows hard, but it's just warm air. her AC unit in particular has the two manual dials to adjust for dual zone, so it's not electronic (clima-tronic i think is the name) where would i start first to try to eliminate the problem? thanks.
anyhow, my wife's 05 230K doesn't ever get cold when you turn on the AC. the fan blows hard, but it's just warm air. her AC unit in particular has the two manual dials to adjust for dual zone, so it's not electronic (clima-tronic i think is the name) where would i start first to try to eliminate the problem? thanks.
Super Member
Joined: May 2008
Posts: 573
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W203
You most likely have an AC leak. The AC compressor will not turn on when there is no pressure.
Mine has had 2 leaks. First was the sub-par quality AC condenser, which I've been told was upgraded on subsequent years (mine is a 2003, yours might be fine). Second leak I haven't bothered to get repaired, I just added a can of R12 and am hoping for the best since the car isn't worth much anymore.
Mine has had 2 leaks. First was the sub-par quality AC condenser, which I've been told was upgraded on subsequent years (mine is a 2003, yours might be fine). Second leak I haven't bothered to get repaired, I just added a can of R12 and am hoping for the best since the car isn't worth much anymore.
Super Moderator
Joined: Jun 2008
Posts: 19,942
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Read this and referenced threads. You must start with full refrigerant charge & pressure - this is likely the cause but you need pressure to diagnose further.
https://mbworld.org/forums/c-class-w...-pressure.html
https://mbworld.org/forums/c-class-w...-pressure.html
Thread Starter
Junior Member
Joined: Jan 2008
Posts: 39
Likes: 1
2005 C230K sport
Read this and referenced threads. You must start with full refrigerant charge & pressure - this is likely the cause but you need pressure to diagnose further.
https://mbworld.org/forums/c-class-w...-pressure.html
https://mbworld.org/forums/c-class-w...-pressure.html
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 191
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
I would have the 134a recharged by a pro aircon place to get the right amount in the system & put dye in to diagnose for leaks.
Super Member
Joined: May 2008
Posts: 573
Likes: 1
W203
Unless you're absolutely concerned with fixing it, I would go this route. I live in a climate where I only need AC 2-3 months/yr, so refilling yearly for $15 isn't that big a deal.
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MBWorld Fanatic!
Joined: Nov 2001
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From: Laguna Niguel, CA
I had my kid's '98 SLK refilled a month ago or so and it works fine now. It too was not blowing cold. I would start there as the A/C place can inject a die when they refill it, so when it leaks, they can use UV light to find the leak, if there is any.
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Super Member
Joined: Feb 2009
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From: San Francisco
2009 SLK 55 AMG
Sorry for HiJack, but why bother with new threads that clutter up server space?
Does AC generally get cold Immediately when you push the AC / Auto button?
I have my climate set to lowest possible generally, because if I'm going to use it... I generally want it cold. Lol.
So my AC, I don't even know if it ever blows at full speed Fully Cold as I've never left it on that long. I generally press Auto, leave it on for like... 15 seconds, then press Auto (turns off the light), then press AC (turns off this light as well), so I assume it's all off.
Then the normal fan I have running generally at 2 speed, and it blows air which is really cold (I like this).
Is this a problem?
I'm not really complaining, as it's cold at some point... but is it supposed to be super cool while the Auto/AC button is on (lit) ?
Does AC generally get cold Immediately when you push the AC / Auto button?
I have my climate set to lowest possible generally, because if I'm going to use it... I generally want it cold. Lol.
So my AC, I don't even know if it ever blows at full speed Fully Cold as I've never left it on that long. I generally press Auto, leave it on for like... 15 seconds, then press Auto (turns off the light), then press AC (turns off this light as well), so I assume it's all off.
Then the normal fan I have running generally at 2 speed, and it blows air which is really cold (I like this).
Is this a problem?
I'm not really complaining, as it's cold at some point... but is it supposed to be super cool while the Auto/AC button is on (lit) ?
MBWorld Fanatic!
Joined: Nov 2001
Posts: 6,211
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From: Laguna Niguel, CA
You can push the recirc button if you want max cooling. Also, putting the temp down way low just makes the fan run faster which raises the temp out of the vents. If you want to control it manually, just set the temp low, but don't use the auto mode and run the fan manually. I do that many times because I can't stand the noise of the fan running at full blast. If you are concerned about a/c temp, get a vent probe thermometer from a pep boys or autozone and see if it cold enough.
