20 Most Recent Dometic 3109228.001 Duo Therm Comfort Control 5 Button Questions & Answers

se if you have 12 volts dc available might be a fuse.

i would remove cover on roof & try to get a closer look at issue.

takes 12 volts d.c to work.

sounds like defective t-stat or it needs to have time and setpoints reconfigured

sounds like thermostat issue not communicating with relay modeule

open circuit or out of range indoor temperture sensor. locks out cool and heat.

you sither have to remove cover on top or look under it on roof should see a tube for draiage.

Do you know how to access your furnace wiring ? What make/model furnace?

What model is the hvac unit that it is hooked to? There is a high possibility that the wires are not hooked up right. You should check the connections at the hvac and see if they are color coded and wired right.

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 +7.5White (W) of the 2 wire goes to FUR.Yellow (Y) to coolGreen (G) to fanOrange or red from the RC lug goes to GNDBlue (H) goes to Hi Fan

check amp draw either bad compressor or fan motor

possible heating element bad

check compressor relay possible stuck on

Call for AC / refrigeration service, it needs refrigerant gas and needs to be checked for leaks. https://www.google.com/search?q=Dometic+Duo+Therm+short+cycles ..