Dometic thermostat and control box
Hello; I have a 2015 Forest River Forester MBS 2401R. My problem, that I have tried to search for, is that the furnace is not running correctly. That is, I turn on the thermostat and the furnace wi...
Forum Discussion
It was a Suburban WH.
GenoB
Posted:01/07/20 04:42pm Link | Quote | Print | Notify Moderator
**** Problem Solved ****
I got to thinking about what could be starving the flame of gas and decided to look harder at the gas valve. I used my digital meter to check the resistance on each coil and found one was 45 ohms and the other had over a Meg ohms of resistance. Looking up the specs I found a good coil is between 30 and 50 ohms. Taking two wires from my battery I attached them to each coil separately and found one worked fine, the other would lock in but after about 30 seconds it would release and then go right back on. A thermal short !!! I suspect the coil would heat up and a wire inside would disconnect, opening the coil and letting the valve close. Then right away contact as it cooled off and open the valve again. Over and over again !
Bought 2 new coils at about $25 and guess what ! WORKS GREAT !
Intermittent problems as ALWAYS the hardest to figure out fine. Thanks for all your help on this, I learned a lot ! Geno B-
GenoB
Posted:01/07/20 04:42pm Link | Quote | Print | Notify Moderator
**** Problem Solved ****
I got to thinking about what could be starving the flame of gas and decided to look harder at the gas valve. I used my digital meter to check the resistance on each coil and found one was 45 ohms and the other had over a Meg ohms of resistance. Looking up the specs I found a good coil is between 30 and 50 ohms. Taking two wires from my battery I attached them to each coil separately and found one worked fine, the other would lock in but after about 30 seconds it would release and then go right back on. A thermal short !!! I suspect the coil would heat up and a wire inside would disconnect, opening the coil and letting the valve close. Then right away contact as it cooled off and open the valve again. Over and over again !
Bought 2 new coils at about $25 and guess what ! WORKS GREAT !
Intermittent problems as ALWAYS the hardest to figure out fine. Thanks for all your help on this, I learned a lot ! Geno B-
