A/C overcharged? high engine load, increased running temps, stalled...thx for input - PeachParts Mercedes-Benz Forum

leathermang · #1 04-02-2011, 08:48 PM

Quote:

Originally Posted by 79Mercy

no this is not integrated with the Txvalve.

Let me look around and see if I can find you a picture of the switch we are talking about.

However after i post this pic i feel we need to get back on topic and help out the OP.

UH... I think knowing what system it is, how it functions, how to separate those functions and TEST them... and integrating that with his symptoms IS helping out the OP....

79Mercy · #2 04-02-2011, 08:53 PM

Quote:

Originally Posted by leathermang

UH... I think knowing what system it is, how it functions, how to separate those functions and TEST them... and integrating that with his symptoms IS helping out the OP....

Yes, but the OP is having a problem with the compressor putting a excess load on the engine, not the evap freezing up.

EDIT: i fixed the picture

leathermang · #3 04-02-2011, 08:56 PM

Quote:

Originally Posted by 79Mercy

Yes, but the OP is having a problem with the compressor putting a excess load on the engine, not the evap freezing up.

EDIT: i fixed the picture

If you know what the problem is definitively.. Just TELL the OP...

I am just trying to figure out all the possible ways in which the system can be loaded to excess and cause the symptoms noted...

leathermang · #4 04-02-2011, 09:34 PM

Quote:

Originally Posted by engatwork

should have stuck with r12

I wonder if they even asked him if he had a preference..
Some places no longer have R12 equipment..
so would just go ahead and do the changeover to get the work....

leathermang · #5 04-02-2011, 09:37 PM

Quote:

Originally Posted by engatwork

this thread is worthless without pressure readings.

That seems a little harsh... I expect some amount of theory and insight into chasing down AC problems has passed to some people... hopefully...
Threads are not just for the OP... otherwise all would be conducted via PM...
seeing how these things are chased down can be helpful....

engatwork · #6 04-02-2011, 09:57 PM

It sure would be nice to see some pressure readings

.

If the system was properly cleaned and there were no particles of metal left in it then I suspect we will see elevated hi pressure readings when the engine loads up. I also suspect that the elevated (but not out of range) engine temp is because of the compressor loading the engine up. I'm also thinking that alot of what you are seeing is because there is r134 in a system that was designed for r12.