Question about Dometic Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: I have a dometic dou
The thermostat needs to be reset. Turn it off and hold the top and bottom buttons in at the same time and turn the thermostat on. In a few seconds will read FF and you should be good to go.
Posted on Mar 19, 2009
It means that an error has occurred. If you have a 4 button comfort control. Follow these steps to reset:
To initiate a RESET, do the following in the order
1) Turn control on to ensure annunciator data and light are present. If data and light are present, continue to next step. Depress MODE switch to activate annunciator light.
Simultaneously depress the bottom two buttons (temperature UP and DOWN) and hold.
While holding these buttons down, depress the MODE button once and release.
Release the two buttons previously held down. Depress the MODE button once again.
At this time the light should extinguish, and the mode should register “OFF”. If not, repeat these steps.
Retest system ensuring that all functions are present
If you have the five button comfort control. Turn the unit off and hold down the mode and zone buttons together. While holding them down, turn the thermostat back on. Hold the buttons down until an FF appears on the screen. Release the buttons and the display should return to normal. If not, try it again.
Posted on Jul 04, 2009
You need to check the cable that connects the Comfort Control to the upper unit. This cable has four wires and should have continuity through all wires. If there is a break in one of the wires or a short, it will cause the CCC to fail and report an error. If all this is fine, then you have a bad control unit in the main unit. Try unplugging the rear unit from the control board and then resetting the Tstat, if this works, then there is a communication problem between the front AC control board and the rear AC control board or the rear control board is bad. Check the cable between the front and rear AC for OK. If it is alright, then you have a bad control unit in the front unit.
Another quick check is to remove the inner shroud from the front unit pull down the control box. Remove the access cover and view the dip switch panel located inside. It should be labeled Zone 1 Zone 2 etc...try turning off Zone 2 and furnace and resetting the tstat. If this works then turn zone 2 on and reset the tstat. If this is ok, then turn the furnace on and reset again. If this works, then all should be ok. If one of these fails, then you can pinpoint the problem there and move forward.
Hope this helps,
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Posted on Jul 05, 2009
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