AC Compressor won't come on.

My compressor has suddenly decided to stop working. No signal at all to the compressor. I put a multi-meter from the electrical lead to ground and I get no voltage at all when the switch is turned on. It's like the LP cut off switch won't come on. If it was the exp. valve I'd have cold air at first then nothing. Or the compressor should at least cycle on/off.

The system has pressure and no leaks. It was blowing cold last weekend, now warm air. I'll verify with better guages that the system has pressure (I have trouble believing a "slow leak" developed and not it's all gone in a few days when the system's been tight for almost a year now).

Is there a fuse somewhere in the system that could be bad?

 

The fuses have voltage (I actually looked earlier but missed the italian word for "condisionia" or whatever it is as being part of the AC - but the owners manual was in English).

How do I check the high/low switch? The switch is hard wired into the line so I can't disconnect it, nor find an exposed terminal, so to speak, to touch a multi-meter lead onto.

 

I can't unplug it. It's screwed into the line and there are two wires, with a boot over them, going into that switch. If I unscrew it, the 134 will come out.

I've verfied I have good pressure on both sides (~35psi) but can't check the high side while "on" b/c the compressor won't come on. THe system has 134 in it.

This is puzzling.

 

ah HA, I can unplug it. I just had to look furhter up the line...more info pending!

 

I jumpered it out, compressor comes on

Low side is 12psi
High side is 55 psi

It's low. That sucks b/c that means something leaks!!! ****!

 

Well.....i found the leak....


I charged it with one can, compressor comes on, things are blowing cold but not real cold...

Check pressures

Low 45psi
High 180 psi


hook up the second can, start to charge it, compressor cycles and...hey, what's all that smoke....that looks like r134 evaporating...the low pressure line right above the gas tank burst...

Now I get to look forward to replacing those AC lines...joy.


I'm sitting here typing this listening to my ac system leak down...this is fun...and it's like 95deg with a heat index of 101...

 

ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss


ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss


I'd cry if I weren't laughing so hard.....right at the start of summer too.....


I'd noticed a small "spot" on one of the vapor lines right above the gas tank and now I know what that oily spot was....a leak in the A/C system....now it's a lot bigger


ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss