Coleman roof top a/c, is the heat controlled by thermostat

Check the plug end of the Power cord for a broken wire. If you can test the cord for continuity with an ohm meter do that first. Most likely you can get a replacement plug. You'll need to cut the old one off and strip the wires back to connect the new plug.

Roof jack may be rusted out.

thermostat bad.

Probably a bad limit switch on the strips or the heat sequencer/relay is falling out after continued amp draw. I would lean toward the heat relay/sequencer. Havent heard of any problems with coleman limit switches. These units were prone to get water inthe electrical compartments due to the evap coil being right above it. Check to see where the power break is starting at the strips and working backwards throught the circuit. That will tell you for sure. Make sure you have 24v going to the heat sequencer too.

If the motor was there originally I would not remove it as it means something that can harm the occupants (gases, heat, etc) has to be expelled from the mobile home using that vent motor.

Looking for a coleman thermostat number 7330-3351. Anyone know where I might find one. It is for a Coleman 7300 roof air.
e mail at [email protected] thanks

Fairly easy. The only thing that you must figure out is how many amps the heat strips will draw. Make sure the fuses and the breaker switch can handle them. And be aware your electric bills will shoot up.

OK got it straight now. here's a link, then go to contact us with info from this page, they should be able to help.
http://www.rvcomfort.com/rvp/products/accessories/electAheat.php

R = HOT 12V
W= WHT- GND
Y = YELLOW / POSSIBLE THERMOSTAT
G= GRND FOR THERMOSTAT
f = FAN
F=FAN
aSSUMING THIS IS A TWLVE VOLT SYTEM- The two f's Would be fan control intake and exhaust - fan direction
White is always ground and so is green.. green is more of a static ground where white is a load grnd.
Red is always hot. in low voltage

I hope this helped. No instructions in kit?

If you have to fix it yourself out of warranty i suggest this ,

REGLUE ALL THE BITS THAT ARE COMING AWAY , THEN FIND A GLUE THAT IS SPREADABLE LIKE A THIN PAINT AND COAT THE ENTIRE ROOF MAKING SURE THAT IT GETS INTO ALL THE CRACKS , LET IT DRY .
THEN PAINT THE ROOF WITH A THERMAL MEMBRANE COATING . This will insulate the camper from the sun and keep heat in during colder times , the thermal paints are not cheap but they do work . Hope this will help you