I have a 91 Breakaway (Sparton, Cummings) that is not getting voltage to the compressor clutch when I turn on the A/C. I tracked the wires to the bus bars on the main panel, and no voltage there, either. Then my eyes glaze over and I have no clue where to look. Any hints?

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StudieRoy

In my '92 Breakaway, power for the A/C comes from the relay on the bottom of the electrical compartment, front left side. Power to the relay is more complex. You must have enough "Freon" in the system to operate the low pressure switch and also have connections through your dash A/C control, A/C thermostat on the evaporator box and overpressure switch. You'll need a meter to trace it through. A tip or two: you don't need to have the motor running, but the ignition must be on to get the compressor clutch to engage. It's much easier to hear it engage when Mr Cummins is silent. Operate the coil on the A/C relay as a first step. If it works, the clutch AND the electric condenser fans will both operate. Good luck.

We have a '96 Monarch, 34' Diesel Pusher. The dash air isn't the best for sure. In warm travels, we end up using the generator and turning on the central air.

[This message has been edited by rugdlr (edited July 24, 2004).]

[This message has been edited by rugdlr (edited August 01, 2004).]

Yeah, anyone with an R12 system will probably end up doing the same thing... I had a dash air unit re-charged a year ago and it was hundreds and hundreds of dollars. It was in a P30 puller, I think it was over $600.00. Awful. My 84' REGENCY has TWO R-12 units, the dash and an auxil. one in the back... and about a hundred feet of hose to fiull up! Yikes!

Trip to Mexico now to get your A/C's charged up!?