I have a 34' shasta with a duo therm air. it is getting no juice it has a switch that always the front or the rear or the front and the rear to work but it was disconnect do you know where to get a wiring diagram or buy a new switch?

When you switch it to off is that at the thermostat? How long before the breaker trips? Is it possible that the heater strips are coming on at the same time as the a/c? Have you been doing some work on this unit? 30 amps is a lot of juice and I would think you would smell or hear something. You got me curious. You say it comes on when its plugged in, Is that before its switched on? Maybe the compressor contactor is stuck closed. Hope this helps, good luck.

sounds like thermostat issue not communicating with relay modeule

If no element installed and connected, heat setting will not work.

sounds like duct damage or restriction in duct work.

Condensor fan at rear of unit may have a faulty relay sticking.

Try Johnstonesupply.com. Use the information you provided above.

i need a wiring diagraham for a duo-therm mod# 54812-136

Sounds like a bad thermostat. Make sure you turn off all related breakers and disconnect switches before attempting to replace it. Good Luck!

my duo therm air works beautifuly all day but at night when we go to bed it seams to turn on and shut off rapidly. what could be wrong?