Question about Dometic Rooftop RV Air Conditioner

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I have a 2007 duo therm ac in my trailer with a heater opption on the selector switch what do i have to do to make this opption function

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If the unit thermostat only says heat,then its a heat unit that will be controlled by putting it in the heat position and adjusting the thermostat to a position that will activate(lets say about70 degrees) to kick the unit on OH! and make sure the propane bottle is open.If the thermostat says heat pump or heat strip,then it is that.

Posted on Nov 02, 2014

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Most times the heat strip is an option that can be installed but is not currently installed. If you check your owners manual, there should be a model number of you AC unit, or you may have to remove ceiling grille, and get model number off the bottom of the upper unit. There will probably be 2 sets of numbers, one for upper unit, and one for the lower unit where the controls are. Write them both down, and get back to me, and I'll see what you have, and what you'll need to get it working. You can try heat setting and see if any heat is felt, just to be sure it isn't already there. You won't get a lot, just slightly warmer air, as it's won't heat entire trailer, but will take a little bite out of the air. Also when/if you remove grille on ceiling, look for a heating coil in opening when exposed.

Posted on Jan 31, 2010

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