Community Forums

No Stress Express · 05-16-2019, 06:14 PM

I posted October 04 /18 Our furnace will not start , "No fan on start up and of course no ignition ..."
Well it took a while to find out why, the On /Off 15 Amp switch/fuse? at the blower fan seemed to be the problem .( see attached photo ) After switching it on and off several times and nothing happened I tried to remove the switch wiggling the wires at the back of it and suddenly the fan started,ignition after a short while and the furnace has worked well ever since. However I'd like to find a " Switch/Fuse " like this in case it fails again . Anyone out there knows where to buy on ? Happy Trails & Safe Travel

Old-Biscuit · 05-17-2019, 11:14 PM

https://pdxrvwholesale.com/products/...r-15-amp-33782

153stars · 05-18-2019, 06:21 AM

People seem to like these marine style breakers.
Circuit Breaker Fuse with Manual Reset Button,12V - 32Vdc,15A,Panel Mount https://www.amazon.com/dp/B07DK4J7PT..._sH.3CbMXN277R

jacwjames · 05-18-2019, 06:46 AM

Are you sure this is a fuse.

My guess it is an ON/Off switch rated for 15 amps.

Old-Biscuit · 05-18-2019, 09:37 AM

Quote:

Originally Posted by jacwjames

Are you sure this is a fuse.

My guess it is an ON/Off switch rated for 15 amps.

It is a combination switch/circuit breaker

Suburban doesn't use the toggle anymore.....replaced with 'push' style switch/cb

CadillLinc · 05-19-2019, 11:12 AM

It looks like the specific switch in the photo may no longer be available. Dometic bought Atwood a couple of years ago. I would call Dometic Tech Support and see what they recommend as a substitute -- 800-544-4881. Have all the info from the furnace data plate available as well as the photo of the switch. I have heard good things about Dometic Cust. Support. Would like to hear about your experience with them, if you call them.

Thanks,
Gene M
2004 Monaco Knight

deano511 · 07-05-2021, 02:41 PM

I had a no start issue with my 8949 not firing but the fan would blow. I traced the wiring and found a low voltage to the circuit board. I traced that back to a micro switch inside the squirrel cage fan housing. When the fan blows the little vane on the switch was supposed to close the circuit providing power to the board. I cleaned the fan off (it had a buildup of dusty crud) and cleaned the switch and vane off. I actuated the switch outside of the housing and the flame came on. Problem solved. I put it back together and all is well.
Hope this helps someone with a no start issue.