Quote:
Originally Posted by Jevad
UPDATE... well, what I had hoped would solve the problem didnt work. After limited testing in last winter where the furnace worked then I used the RV in the spring through the early fall so far without really needing much furnace/heat. my trips took me south and through hot summer months (note AC worked well, as needed on demand). As I prepped for a weekend camping trip now that the weather turned cold, I started running the heat and found the same problem occuring. I did have the replacement sail switch that the Dealer sent me, I swapped that out and now having the same issue occuring even with the new switch installed. So, something else is going on, wiring looks solid, again the furnace runs without a problem, but once it heats to desired temp the thermostat stops the heat, but doesnt restart. it works until I do my thump on the outside. I need help again to try and pinpoint what is sticking after the thermostat runs. (I really do NOT think its the thermostat (as I disconnecnt and reconnect without fixing).
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Next time you have this symptom and verify via voltmeter that you have no 12 VDC to the thermostat (or just turn the AC fan switch to "ON" - it will not run if there is no 12 VDC to the thermostat: it will run if you do have 12 VDC to the thermostat) then check to see if you have 12 VDC to the "RESET" switch (both sides) in the furnace compartment.
If you really do have 12 VDC on both sides of the switch and the thermostat it has to be the control board. If you are really missing 12 VDC in either place you have a wiring problem.
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