Testing 3 wire Dometic Thermostat
I'm having some issues with my furnace. Air is working fine but nothing happens when I turn the furnace on (exhaust fan does not kick in but the AC fan runs). I am thinking my issue is with my three-w...
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Just went through this and not too bad if yours is the same as mine in a 2015 Thor ACE. Go to your board and pull it out and unplug the six wire connector. Turn thermostat so the heat should be coming on, have your multi-meter set to check DCV. Place black test lead on black wire and the red lead on the blue and you should see 12 volts.
If you have that it should be the board, look at the bottom with all the little solder joints. If any of these are discolored this shows a short and needs replaced.
Any board I have found bad I have replaced with "Dinasour Electronics." I recommend them because they are a good product with great customer service but that is my only connection with the company. Give them a call and a technician will troubleshoot over the phone and if it is a bad board will recommend a replacement. If you do need a new board they do not sell direct so Amazon is your friend. Make sure you send in the warranty card, I just had the replacement board go bad and they said to just send it in they would look up the warranty. They replaced it even though it was caused by water damage with a note they only warranty once for water damage. To me that is a very good warranty and it is a three year warranty. Jim.
If you have that it should be the board, look at the bottom with all the little solder joints. If any of these are discolored this shows a short and needs replaced.
Any board I have found bad I have replaced with "Dinasour Electronics." I recommend them because they are a good product with great customer service but that is my only connection with the company. Give them a call and a technician will troubleshoot over the phone and if it is a bad board will recommend a replacement. If you do need a new board they do not sell direct so Amazon is your friend. Make sure you send in the warranty card, I just had the replacement board go bad and they said to just send it in they would look up the warranty. They replaced it even though it was caused by water damage with a note they only warranty once for water damage. To me that is a very good warranty and it is a three year warranty. Jim.
