system has freon and i bypassed switch on accumulator. fuses are ok. cant get clutch to kick on. Help!

 

I've had the same problem for at least two years after replacing the original unit with an aftermarket rebuilt (OER I think)...I feel your pain Brother

 

Can you measure it there is voltage at the compressor connector?

 

no voltage was at the clutch. i can run 12volts to clutch and it will work. funny thing happened today. it started working again. iam puzzled what stopped it from working. i guess i will have to waite for it to fail again.

 

The pick-up unit mounted next to the low side suction valve is most the time the problem. It goes and comes sometimes. If you place a jumper across the terminals it will engage.

You will have to bleed system to replace it.

 

Muffinman, can you elaborate? What is this low side suction valve? Can it cause a low pressure on the switch on the accumulator? Are there other pressure sensors in the system?

On my van, the EEC also controls a relay that ultimately switches the A/C compressor. The relay is located under a cover behind the battery. I think the EEC takes a number of signals, including the accumulator switch and throttle posistion, to switch the compressor. I don't know all that goes into it, but I don't believe it is just the pressure switch.

 

when mine quit i did short out the switch on the suction valve and compressor would not come on. iam still baffled. mine is still working at the time but i know it probably will quit this summer. maybe it is the relay.