Furnace does not shut off

[Bigdog6]

Originally Posted by boondocking

Does it continue to blow hot air the whole time?

Yes

[boondocking]

Then that rules out a defective high limit switch.

[Cherokeerose]

My furnace does this as well. I have had it shut off now for almost a half hour and the blower is still on, but the air that is coming out of the floor vents is definitely cold. This is an older Suburban SF-35-F furnace and came with the unit which is a 1999 5th wheel Cardinal. Any suggestions? Thank you.

[Wandering Man]

Originally Posted by stormer

I've had this happen to me 2x. Once on the first night we used it in Ohio. The second was a few weeks ago. We had to pull the fuse. The thermostat said it was "off" but it would just keep heating and blowing. After pulling the fuse and waiting till the next morning... (it was so cold!!) I said the heck with it and put the fuse back in. It ran great from then on out until about 2-3 weeks ago where it did the same thing. Pulled fuse, waiting a few hours, put it back in. So dunno... if you have the same problem. But mine seems to work fine now. It's like it has to reset or something. This a new TT? Ours was spanking new on day one when it happened to us.

James

My furnace refused to cut off, even with the indoor temp at 95 and the outdoor temp in the 40’s. None of my fuses say “blower”. I’m wondering which fuse will work?

It finally stopped after I pulled the thermostat off the wall and I jiggled the white wire. But that could be happenstance.

I’d prefer to just pull a fuse until we get home.

[bikendan]

Originally Posted by Wandering Man

My furnace refused to cut off, even with the indoor temp at 95 and the outdoor temp in the 40’s. None of my fuses say “blower”. I’m wondering which fuse will work?

It finally stopped after I pulled the thermostat off the wall and I jiggled the white wire. But that could be happenstance.

I’d prefer to just pull a fuse until we get home.

You replied to a thread that is 4 1/2 years old.
I'm sure that the OP's issues are solved by now.

[Larry-NC]

Originally Posted by Wandering Man

My furnace refused to cut off, even with the indoor temp at 95 and the outdoor temp in the 40’s. None of my fuses say “blower”. I’m wondering which fuse will work?

It finally stopped after I pulled the thermostat off the wall and I jiggled the white wire. But that could be happenstance.

I’d prefer to just pull a fuse until we get home.

Would you PLEASE post a picture of your thermostat, just as I asked the original poster to do, and which he kindly did?

• Take a picture.
• Put it on your computer in a known folder (e.g., Documents, Pictures, Pictures/trailer, or Desktop).
• At the top of the editor is a paperclip icon. Click it.
• In the popup window, click Choose File
• Navigate to the folder where the picture(s) is stored
• Select the picture, click Open
• Repeat the above step if you have more pictures
• Click Upload
• Click Close This Window

[Cworf]

Did you ever get this fixed? I'm having the same issue.

[Wandering Man]

Originally Posted by Cworf

Did you ever get this fixed? I'm having the same issue.

While at the campground, I pulled the thermostat off the wall and jiggled the wires. The furnace shut off. I still don't know if that was a coincidence.

I took the RV in for repairs and maintenance. When I picked it up, they told me that all of the wiring looked good. They did not find any shorts. Then they began to explain to me how the system worked, that I needed to check both zones, etc., etc.

When the repairman stopped telling me what I already knew, I explained that the temperature had reached 97* in the trailer and was still going.

He advised that if it happened again, I pull the fuse for the A/C to stop it, and then said it could be a faulty thermostat.

I will likely bring it back to them for a new thermostat after our next winter-time trip.

[bubbles]

Originally Posted by Wandering Man

While at the campground, I pulled the thermostat off the wall and jiggled the wires. The furnace shut off. I still don't know if that was a coincidence.
When I picked it up, they told me that all of the wiring looked good. They did not find any shorts.

How about opens? Don't answer.