Question about Dometic Rooftop RV Air Conditioner

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Same as above problem

Duo Therm Penquin model 630516 on RV hums a bit but does not kick on. Also emits a "hot plastic odor". Entire unit was replaced in Jan., 2006. R/R Starter Capacitor was replaced June, 2007.

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The hot plastic smell is usually a telltale sign that the Start Capacitor has gone out again. Remove the upper shroud and the cover to the access panel. You should be able to physically look at the PTCR to tell if it is burned. If all that looks fine, then from the inside, remove the inner shroud and then control box. Open the control box and inspect the relays and connections for OK. You problem is more than likely one of those two places.

Hope this helps,

Jeff

Rate me please!

Posted on Jul 04, 2009

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Posted on Jan 02, 2017

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Sounds like you have either an bad Start Capacitor/PCTR or have burned out the controls of the front unit. Get on the roof and remove the upper shroud of the front unit. Access the capacitors by removing the cover on the side of the AC. The capacitor that you are looking at has a black "relay" attached to it. Visibly inspect this for electrical damage or charring. If so, replace it. If this looks fine, then put everything back and head inside.
Remove the inner shroud from the AC and pull down the control box. Remove the cover from the control box and inspect the 120V connections for ok. If they are burned, you can often cut them back to clean wire and reattach. If these look fine, remove the entire cover and inspect the 120V wires at the relays. If they are burned, replace the control unit.

Hope this helps,

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3: You Have 2 options
1: Close the Rear door when just Using the "Front Unit"
2; If you choose to Leave the "Rear Door" Open, Just make sure the "Rear Unit" is on Making the "Front Unit" Work far less.

You will be fine
Please Rate me, Thanks George

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