20 Most Recent Dometic 640315 Duo Therm 13,500 BTU Penguin Low Profile Air Conditione Questions & Answers


I'm sorry for posting here but I have the same problem and I want to know if you managed to find a solution

Dometic Heating... | Answered on Oct 25, 2020


I was replacing a DUO-Therm 3105058 Rev A. very old Thermostat in a Coachman RV with 3106995.032 from Amazon. After looking all the information on the directions it was clear I would have to play a hit or miss on some of the wiring. Instead of using the same coding, such as RC, RH, G, Yellow and such. they used the function and I had to guess at some.
Here is the wiring I found worked:
There are 6 wires. One set of two wires (white On the W & red on the RH) and the set of 4 (yellow On the Y, green on the G, red on the RC and blue on the H). So to keep it simple the red on the RH went to the +7.5. The White on the W went to the FUR. HS/HP not used. the Yellow from the Y went on the cool. The green on the G went to the fan. The red on RC went to GND. and the Blue on H went to Hi fan.
So red (RH) of the 2 wire goes to +7.5
White (W) of the 2 wire goes to FUR.
Yellow (Y) to cool
Green (G) to fan
Orange or red from the RC lug goes to GND
Blue (H) goes to Hi Fan

Dometic Heating... | Answered on Jun 11, 2020


Need to go up there and give more info. Look for outdoor fan...Is it spinning? Compressor on? Could be dual capacitor as they are 50% of problem lately

Dometic Heating... | Answered on Aug 22, 2019


I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manuals

Dometic Heating... | Answered on Aug 17, 2019


It sounds like your Dometic unit is not getting power despite the breaker being on. Unless the Dometic unit has an internal fuse to check, I would get out a volt/ohm meter and check to see:
1. Is there power coming out of the breaker that goes to the ac unit?
2. Is there power at the terminals of the ac unit? (You can sometimes remove a ceiling cover to access the contacts on the on off switch.

Lastly is your RV hooked up to full power with two 110 volts on both legs beside the neutral and ground wire? If you are only feeding your RV with a standard 110 volt extension cord and using an adapter, that can mean half the circuits in your RV are energized while the other half 110 volt leg is not. You must energize the second leg by using a full 30 amp or 50 amp dual power cord.

RV's are funny. They require two 110 volt legs with a neutral and a ground. The two 110 volt legs are both of the same phase. There is no 220 volts between the two hot legs as they are in phase. A volt meter between the when hot would read zero volts, while each hot leg to neutral would read 110 volts.

Hope this helps.

Dometic Heating... | Answered on Aug 10, 2019


Direct Replacement? You can go to any hardware store and replace with any thermostat. If you have Air conditioning make sure you get one AC compatible

Dometic Heating... | Answered on Jul 12, 2019


Something has blown. Check fuses, connections, recheck all wiring connections. Don't know why the module and thermostat were changed but there may have been another original problem.

Dometic Heating... | Answered on Jun 16, 2019


Take it back to where you bought and have repaired under warranty.

Dometic Heating... | Answered on May 31, 2019


It sounds like your thermostat is stuck or your main contactor is stuck. Try shifting modes on your thermostat. If still stuck, try removing the thermostat, if the AC system did not stop it is your main contactor stuck and needs replaced. If your AC system stopped, it is your thermostat stuck and needs replaced.

Dometic Heating... | Answered on May 29, 2019

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