I have a 2007 Carson toyhauler. I took it out on halloween, and half way thru the weekend, my furnace quit, and will not light. Here is what happened: Generator was running (honda 3000i) Airconditioner was running. I was sitting outside. Went back inside, about a half hour later, the generator was still running, but all of my power on the inside of the trailer was out. Turned off the generator, flipped all of the breaker switches, and everything seemed ok, everything was working again....until I went to take a shower...no hot water. The furnace switch on the inside of the trailer will not light up at all, and there is no propane going to the furnace at all. I have checked the fuses, inside and the one on the battery, theyre all ok, I read something on the furnace door about a thermal cutt off..... Does anyone maybe know what is wrong? Please help!

Sounds like you're out of propane. Try lighting the stove. If that doesn't light, go outside and check the propane switch, if it's red, flip the switch over to the other propane tank, close the valve on the first tank and open the valve on the second tank.

If you have a continuity light, check to see if you have 12 volts at the water heater. there should be power of some sort going to the water heater. Is there a safety gas shut of valve ( electric). Check that to make sure you are getting propane to the heater. If you disconnect any propane lines make sure nothing leaks after you re-connect You could have an inline fuse somewhere on the power feed to the heater. I'm assuming its a pilot less burner

Both of my propane tanks are full, the stove and refrigerator work...

Sounds like the thermal shut off fuse. I had this go out on my Atwood awhile back. I now carry a spare. To prove this out, bypass the fuse by removing it. i.e. connect the wire directly. If the light on the switch inside lights up, you found the problem.

Thats exactly what it was! Replaced it today, and it lit right up! I now have a spare as well...thank you!

So did you ever find out what's wrong with your furnace?

Yes, it was the thermal cut off fuse. Working great now, ready for thanksgiving

Good to hear you got it fixed! I've never had a problem with my water heater thermal fuse, but I'm going to get a spare just in case!

I read on the internet, that it will completely shut down the electrical and propane to the water heater if it gets hot, to prevent a fire. In my case, im not sure why it went out, must have had something to do with the air conditioner overloading my generater (im think my generator is too small to run my air conditioner..its a honda 3000i)

YES, drain your water heater, even if you're not going to use it for a few months. I drain mine every time I return from an outing.

That thermal inline fuse is a good thing to keep on hand as a spare. Where that thing is connected, the 2 wires connect to it, goes out sometimes as well.

I was a RV tech here in Tucson for the big 3 dealers after I retired from the USAF. I have since gone back to work on aircraft for the USAF again, money is a bit better, and secure.

Let's go out, I'm ready again.

BBTank

Where can I get a spare? What do they cost?

Thanks

<----------------- standing by for the answer too.

Any RV parts store should have em.
Maybe Camping world.....

Kevin will have these at All About Fun RV on the East end of town

Thanks, I'll stop by this weekend.

One other thing that can be checked if a heater wont light is the battery. As it turns out if the battery is low the fan will still run but the igniter won't light it off. So try it with the genny on if it lights then it s the battery.