Furnace fan issues

JRRNeiklot wrote:
I shorted the thermostat out of the equation and the fan comes on. I'm thinking now that there is a break in the thermostat wiring. I'm going to run new thermostat wires and see if that fixes it. Meanwhile, there is some brown water running in the floor near the furnace. The furnace is near the sink, but I don't have any leaks, either in the trailer itself or around the sink. It's an old trailer, could that be condensation running through rust?

Thanks.

Frankly, without being able to see the location and surrounding area, anything would be a guess. My WAG--rain has entered the exhaust or inlet ducts and has migrated downward.

With an older furnace like you have, it may be a good idea to look it all over and check everything real good. A few things I'd check would be the connectors on the circuit board, the condition of the sail on the sail switch, and the mentioned intake/exhaust ducts. If you can get some oil onto the fan's rotating parts, you'd be like a boss. :B

Good luck with your furnace ills. If you have made the fan spin, you're almost heating.

The furnace is on the other side of the trailer from the fridge. It could be the sink, but I don't think it's leaking. I'll check more thoroughly after I get the furnace working.

Thanks.

The water must be coming from somewhere. You must have a leak. The furnace should make enough condensation to make water run. Is the furnace under the fridge? Does your fridge have a drain tube that goes outside? If it does may that tube has a leak.

I shorted the thermostat out of the equation and the fan comes on. I'm thinking now that there is a break in the thermostat wiring. I'm going to run new thermostat wires and see if that fixes it. Meanwhile, there is some brown water running in the floor near the furnace. The furnace is near the sink, but I don't have any leaks, either in the trailer itself or around the sink. It's an old trailer, could that be condensation running through rust?

Thanks.

Sorry, I can't help you more. I just don't know.

Is your furnace by chance installed beneath your kitchen sink?

Reason I ask is that our last trailer had that setup, and after some drips of water fell directly onto the control board of the furnace and we had a possessed furnace and blower. Water plus electronics makes for some intersting situations :)

Solution: reseal the drain in the sink, and mounted a 'water deflector' above the furnace.

CavemanCharlie wrote:
There are several different types of RV furnaces. What is the make and model of yours?

Suburbun SF-20.

There are several different types of RV furnaces. What is the make and model of yours?

It's not a digital thermostat. It's this one: http://www.amazon.com/gp/product/B003G9DD8S/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1


The air conditioner is separate, and has it's own built in thermostat. This is an older 1995 trailer.

The SF series furnace will only run its fan when there is a call for heat. The fan switch on the thermostat controls the fan on the air conditioner. If the fan on the furnace runs without the burner trying to come on there is a problem with the furnace control board.