Had a senior moment yesterday. New Winnie has Suburban furnace not Atwood! All of the problems below apply to the Suburban furnace.Just took delivery on new Winnie. Front furnace worked fine during PDI on Thursday. No heat now. Fan running, blowing cold air. Can't hear tick-tick-tick of igniter. Can smell hint of propane at exhaust when I try to light. So, I know it's getting gas. Intake and exhaust not blocked. Propane tank at 88%. Propane lines have been bleed of air. Stove works as does rear furnace. It's obviously under warranty, but thought there might be a quick fix. I suspect control board, but is there a fuse to check? Other ideas? I assume there are probably LED codes to read as with the Atwood. Thanks for the responses in advance. Will be on the road and possibly not able to reply for the next 7-8 hours.

First thing I would check would be the FAN SWITCH SAIL VANE... Maybe some of that CAT and DOG hair might have go into it haha...This switch keeps the furnace from lighting in the event the FAN has failed. Squirt some WD40 on the contacts. The only one I worked on looked like this... Had debris around the button and wouldn't push it in all the way...Roy Ken

As a last resort, have tech replace circuit board. I had problems w/furnace for 7 yrs, replaced all switches, etc. Tech said circuit board checks out OK, but what else could it be? He put in new circuit board and works as it should now.For 7 years, the furnace was weird; worked, but not as I thought it should --- wouldn't come on when it should, cut off at wrong times, etc. It worked just enough that me and the techs thought it was just me, an old man who is clueless. Right, but wrong, eventually.

OK, there is no fuse. IF you do indeed smell LP at the exhaust that means that sail switch is operating. On a Suburban, if you get LP smell and no tic tic tic, that means that either the Piezo wire is grounded(not likely) or the spark electrode is too close to either the burner or the case above the burner. Regardless, the furnace will have to be pulled to check the burner and the LP orifice and the gap on the spark electrode. Doug

Similar problem with new Suburban furnace, except I could hear the igniter trying its best. After months of repair efforts, one tech finally said too much air being blown over igniter, overwhelming the propane and thus nothing to ignite. He somehow restricted the air flow at ignition, now lights every time. Not sure this is the best situation long-term, so am still arguing with Suburban.

Check your battery for sufficient voltage - low voltage will prevent start...remove exterior cover and check For blinking LED followed by pressing reset button.

Duh - Problem with new Suburban furnace not Atwood

14 Replies

AZRick
Explorer
Nov 22, 2015
Similar problem with new Suburban furnace, except I could hear the igniter trying its best. After months of repair efforts, one tech finally said too much air being blown over igniter, overwhelming the propane and thus nothing to ignite. He somehow restricted the air flow at ignition, now lights every time. Not sure this is the best situation long-term, so am still arguing with Suburban.
dougrainer
Nomad
Nov 22, 2015
OK, there is no fuse. IF you do indeed smell LP at the exhaust that means that sail switch is operating. On a Suburban, if you get LP smell and no tic tic tic, that means that either the Piezo wire is grounded(not likely) or the spark electrode is too close to either the burner or the case above the burner. Regardless, the furnace will have to be pulled to check the burner and the LP orifice and the gap on the spark electrode. Doug
5thwheeleroldma
Explorer
Nov 22, 2015
As a last resort, have tech replace circuit board. I had problems w/furnace for 7 yrs, replaced all switches, etc. Tech said circuit board checks out OK, but what else could it be? He put in new circuit board and works as it should now.

For 7 years, the furnace was weird; worked, but not as I thought it should --- wouldn't come on when it should, cut off at wrong times, etc. It worked just enough that me and the techs thought it was just me, an old man who is clueless. Right, but wrong, eventually.
RoyB
Explorer II
Nov 22, 2015
First thing I would check would be the FAN SWITCH SAIL VANE... Maybe some of that CAT and DOG hair might have go into it haha...

This switch keeps the furnace from lighting in the event the FAN has failed. Squirt some WD40 on the contacts. The only one I worked on looked like this... Had debris around the button and wouldn't push it in all the way...

Roy Ken

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Duh - Problem with new Suburban furnace not Atwood

14 Replies

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