Problem with my 1999 Chevy S-10.
GM tech = mw
question = My A/C stopped working. I got the 134a refill with gauge and made sure it was full.
Still not working. I went to local auto parts store, they said to take the switch off the (forgot the
part name) the cylinder shaped aluminum looking thing that has tubes going in it. (This is also
where low pressure hookup is).
They said to take that switch off, put a jumper between the two make connectors and if the
compressor stays on, I need to replace that switch. I did what they said, put jumper on,
compressor stayed on. I put the new switch on and it did what it did before. Compressor comes
on and 2 secs later shuts off. You can hear a little clicking sound also coming from near where
that cylinder shape thing is.
Jumping the pressure cycling switch helped, but the new switch made no difference.
I would look very closely at the wires for that switch. The terminals may be spread apart so they
dont make good contact in switch, or the wires are broken right at the connector.
Other possibility is that the pressure in the system in incorrect, so that switch disables the
By using a jumper wire, you are defeating the purpose of the cycling switch, so it does not know
the pressures are wrong, therefore stays running.
Need to put gauges on the system, hook everything back up correctly, then see what the
Chevy S-10 A/C Blowing Warm Air