Furnace fan won't start November 20, 2017, 11:56:55 am Yahoo Message Number: 16344Hi Everybody - my rv is a 2005 Gulfstream Endura and the furnace fan won't come on when I turn the thermostat on. If I jumper 12 volts directly to the motor the fan starts up and the furnace will make heat and even be controlled by the thermostat.I put a new circuit board in it, but still no luck.Any ideas??? Quote Selected
Re: Furnace fan won't start Reply #1 – November 20, 2017, 11:58:09 am Yahoo Message Number: 16345By the way it's a Suburban SF-35 model. Quote Selected
Re: Furnace fan won't start Reply #2 – November 20, 2017, 12:24:31 pm Yahoo Message Number: 16346Bad Thermostat. That's my guess. I have 2 of the original Duo Therm thermostats that I took out of my MH. There yours if want to come and get them.What are you hooking 12 volts too?BestRon Hall Quote Selected
Re: Furnace fan won't start Reply #3 – November 20, 2017, 12:39:21 pm Yahoo Message Number: 16347I also believe it is most likely a bad thermostat. Quote Selected
Re: Furnace fan won't start Reply #4 – November 20, 2017, 02:10:45 pm Yahoo Message Number: 16348Hi Dave, I'am not a mech but three things do come to mind.1) rodents can gain access and possibly chew thru wires.2) by placing a jumper, you may be circumventing a breaker or a fuse or both..3) also with a jumper you could be nulifying a built in safety control associated with the propane system. Quote Selected
Re: Furnace fan won't start Reply #5 – November 20, 2017, 02:23:16 pm Yahoo Message Number: 16349The jumper was just a test method to see if the blower motor worked. Thanks Quote Selected
Re: Furnace fan won't start Reply #6 – November 20, 2017, 10:04:10 pm Yahoo Message Number: 16350There is a normally open time delay relay that is being jumpered. Replace the relayhttp://bryantrv.com/docs2/docs/SFseriesservice.pdfFound a wiring diagram on above web site. Quote Selected
Re: Furnace fan won't start Reply #7 – November 21, 2017, 11:41:34 am Yahoo Message Number: 16351This one doesn't have a seperate relay. Turns out that after we replaced the board, we bent one of connector's pins so it wasn't making contact....... Quote Selected
Re: Furnace fan won't start Reply #8 – November 22, 2017, 06:19:48 am Yahoo Message Number: 16352Glad you got it fixed.BestRon Hall Quote Selected