96 Dolphin Condenser fan wiring

[mjlayton]

I replaced the original electric condenser fan last July. Everything worked as designed till we took a short trip last week. A/C would not cool while stopped (like when the old fan went bad). Now there is no voltage at the fan motor with the A/C on. Does anyone have a wiring drawing or know where the relay & fuse are located on the coach? Tried tracing the wires, bundle got to large to follow.
Thanks,
Mike Layton

[BFlinn181]

Knowing what chassis your RV is on might help. In general, the HVAC dash control triggers a relay to turn on the compressor and the condenser fan. In a gas RV, the relays are often all grouped together in a plastic box with fuses and blinkers. Many of the relays are identical, you could troubleshoot by switching relays with other like ones.

[mjlayton]

Yes, I should have posted the chassis. It's a GM P30 Gas, evaporator housing says EVANS.

Thanks,
Mike Layton

[BFlinn181]

Evans Tempcon provides HVAC for many RV manufacturers and also the auto and truck industry.

Have you looked for a fuse and relay box under the hood?

[mjlayton]

Yes, no relays or fuses ahead of the firewall. I've looked everywhere I can, had part of my elbow joint replaced recently and nearly got stuck trying to look around the steering column/instrument panel.

[mjlayton]

Problem solved. Thanks for the input. Ended up being a bad high pressure switch. Still don't know where the relay and fuse are for the fan, but everything works.