2006 w203 Inconsistent HVAC
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Joined: Jun 2021
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91' 190E 2.3l 5spd Manual, 06' c230 Sport 6spd Manual
2006 w203 Inconsistent HVAC
Hello guys, oblivious newbie here, long time lurker, first time poster yada yada. I have a 2006 w203 c230 Sport 6 speed manual that I purchased a bit over a year ago and have put a bit over 10k on putting the mileage at 165k. When purchasing the car was told the AC would blow cold in the mornings no problem, but have issues in the afternoon. I took the car to a shop and spent around $1500 having the ac compressor and expansion valve replaced. AC still operated intermittently, sometimes the dead of night or first thing in the morning it would blow ice cold, but during the daytime it would rarely blow cold air. Was told by the mechanic it is an interior AC sensor in the dome light assembly reading zero degrees Celsius and that Mercedes charged $500 for the dome light assembly replacement and that it may or may not fix the problem. I went to a junk yard and pulled out a few dome lights to swap out, but none have worked so far. I'm so deep into this AC project financially and I would love to figure out what the hell is going on... why sometimes it works perfect, but most of the time it blows sweaty hot air. The AC also smells gross when it's turned on like mildew, the cabin air filter has been replaced recently. Could it be the AC Pressure Switch? I'm grasping at straws at this point. Thank you for any help and your time!
-Tyler
-Tyler
Thread Starter
Newbie
Joined: Jun 2021
Posts: 2
Likes: 0
91' 190E 2.3l 5spd Manual, 06' c230 Sport 6spd Manual
My brother has a set, we'll make sure the system is still pressurized, but since the interior dome light sensor reads zero degrees even when you blow air into it, we might need to track down that problem as well! Thanks for all your help and if anyone else has had a similar issue I'd love to hear!
