Re: 93 190e AC is Cold, then blows hot, Heat blows hot, then cold
- From: pcowper@xxxxxxxxx (Pete Cowper)
- Date: Tue, 18 Oct 2005 19:09:28 -0700
I had a similar problem on my 1987 300E. It was a bad KLIMA valve in my
case.
The air conditioning would blow cold for about 10 minutes then blow
ambient air. The compressor had shut off. If I shut off the ignition
and immediately restarted the car, it would blow cold again for another
4-5 miles then blow warm air again. Could be recycled that way over and
over again.
A fairly experienced and reputable independent shop said I needed a new
compressor after numerous fixes, including replacing leaking expansion
valve and service valve minor leak repairs. Since the car had a new
compressor less than 10,000 miles before, I declined.
I made an electrical jumper per the factory manual, removed the KLIMA
relay, and tested each system with the jumper wires. Everything checked
out, so I bit the bullet for a new KLIMA relay ($160.19 at MB dealer).
The air conditioning has worked fine for two summer seasons (100+
degrees here near Fresno) now.
Swapping easy to replace parts is usually not the way to fix something,
but in my case the easiest fix was what ended up being the problem.
.
- References:
- 93 190e AC is Cold, then blows hot, Heat blows hot, then cold
- From: groovynet
- 93 190e AC is Cold, then blows hot, Heat blows hot, then cold
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