Duo Therm questions

[Longwinded]

I have a Duo Therm 900 series not working. When I bought it the man said it needs a new thermocouple. I found a manual for the 901 series and according to that system there isn't a pilot light. So would there still be a thermocouple?

At first I could occasionally get it to blow warm air for a few moments then cold. From other posts this sounded like it might be a thermocouple issue. Everything else sounds okay. I increased air flow to adjust for the cold temps as the manual suggested and made sure exhausts are not blocked.

Another issue that may be the culprit is that a few outlets don't work, including the GFI. I've reset breakers, fuses look okay and replaced GFI. Still nothing. It's located in the bathroom, just inches away from the furnace. Could the furnace issue be related to this electrical issue?

I attached a photo of my furnace and a closer look at a wire that appears to be loose in the back?

[Old-Biscuit]

No thermocouple used
Flame sensing rod/ground rod used to detect flame ionization/rectification


Not familiar with the 900 Series per se....if it is an 120V AC to 24V AC unit then the AC Issue with your GFI circuit
GFIs have to have AC Power to reset.....so check that the AC Circuit Breaker for the 'receptacles/outlets' is not tripped.


Otherwise if the 900 Series is 12V DC then should have DC Power via battery and/or converter (unless converter is fed from that GFI circuit???)


Manual that covers the 900 Series
https://www.gmcmi.com/wp-content/upl...vice-Guide.pdf


Manual for the 901 Series....applies to 900 Series (good troubleshooting)
http://bryantrv.com/docs2/docs/901.pdf


Duo Therm DSI Service Bulletin
http://bryantrv.com/docs2/docs/659/ODSI.pdf

[Longwinded]

Thanks for the 900 series manual! It took me a couple hours just to find the 901 series. I've checked the breakers multiple times and they're not tripped. Unless there is another breaker panel somewhere on the RV I haven't found. Otherwise I'm at a point of getting an electrician to look at it and start there with the problem solving. It's a bit of a puzzle.