Where's furnace fuse?

[Astrodokk]

I've been trying to get the furnace to light, but to no avail. The blower starts but blows cold air. I attempted about 5 or 6 times, now the blower doesn't even start up anymore. I checked fuses at the Univolt, and all are good. The book doesn't state there are any furnace fuses in the fuse box up front, so what do I do?

[Inland RV Center, In]

Originally Posted by Astrodokk

I've been trying to get the furnace to light, but to no avail. The blower starts but blows cold air. I attempted about 5 or 6 times, now the blower doesn't even start up anymore. I checked fuses at the Univolt, and all are good. The book doesn't state there are any furnace fuses in the fuse box up front, so what do I do?

Use a voltmeter to make sure that a good looking fuse, is indeed good.

You could also have a thermostat problem.

Andy

[Astrodokk]

It's not a trailer...see my avatar and signature.

Voltmeter at the fuse, but I don't know where the fuse is! The thermostat clicks like before.

[Inland RV Center, In]

Originally Posted by Astrodokk

It's not a trailer...see my avatar and signature.

Voltmeter at the fuse, but I don't know where the fuse is! The thermostat clicks like before.

The fuses should be near the Univolt. As I recall the Univolt is under one of the dinette benches.

Take the cover off the thermostat and observe that the contacts are working correctly.

Andy

[overlander63]

Could be a bad sail switch, or the igniter board may be bad.

[Astrodokk]

The univolt is under one of the rear twin beds midship, on the passenger side. No other fuse boxes under there except for the univolt ones (six of them). I'll check with a meter and also will take the stat cover off to observe.
Where would the sail switch or igniter board be in a motorhome ('79/'81)? The Suburban furnace is under the galley sink. I see a couple of thermcouple looking wires in there that look good and very clean, but no board.
If I can't troubleshoot this, I'll be taking it to my local RV place to fix. I need heat this winter on my usual treks. I nearly froze a few years ago at the foot of Mt Shasta!

[Inland RV Center, In]

Originally Posted by Astrodokk

The univolt is under one of the rear twin beds midship, on the passenger side. No other fuse boxes under there except for the univolt ones (six of them). I'll check with a meter and also will take the stat cover off to observe.
Where would the sail switch or igniter board be in a motorhome ('79/'81)? The Suburban furnace is under the galley sink. I see a couple of thermcouple looking wires in there that look good and very clean, but no board.
If I can't troubleshoot this, I'll be taking it to my local RV place to fix. I need heat this winter on my usual treks. I nearly froze a few years ago at the foot of Mt Shasta!

The sail switch and ignitor are parts of the furnace.

Andy

[Mike Leary]

If it's the board, and I bet it is, have them replace it with a "Dinosaur". Something a pro should handle.

Dinosaur Electronics Home. High quality circuit boards for RV appliances.