PeachParts Mercedes-Benz Forum

PeachParts Mercedes-Benz Forum (http://www.peachparts.com/shopforum/)
-   Tech Help (http://www.peachparts.com/shopforum/tech-help/)
-   -   1999 500SL AC not working (http://www.peachparts.com/shopforum/tech-help/221279-1999-500sl-ac-not-working.html)

gpt500sl 05-04-2008 09:32 PM

1999 500SL AC not working
 
I have a 1999 500sl and the AC stopped working, only hot air blows out. I checked fuses and they were ok. I checked the low pressure side and it was high. Any suggestions what else to check?
Thks,

just-n-time 05-05-2008 02:34 PM

If you have a high pressure reading the clutch will cut out and not pump. you most likely have a restriction and probably at the expansion valve, your year may have the needle valve orifice,they tend to plug with a thick black gunk,if so then the system needs to be flushed,check around see if you can find a service place that will flush it with nitrogen, dose a great clean out.

Matt L 05-05-2008 02:35 PM

I suspect that my "high" he means only 70 psi or so. A quiescent system will have such a reading on the low side.

capcon 777 05-05-2008 09:27 PM

have your system cleaned and if that dont work put a rebuilt compresser and it will solve all your problem. the clutch is not working properly on compresser.

okc329 05-05-2008 11:52 PM

If the cold air went away ....
 
suddenly, you could have a bad evaporator temperature sensor. A lot of MB cars have diagnostics that can be run with the A/C controller. Look for info on how to do this and interpret them. Use the search feature of the forum.


All times are GMT -4. The time now is 07:57 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website