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Freedom7 · 10-04-2015, 08:22 AM

On my 2007 Allegro Bus, the Furnace will not come on. The Electric Heat Pump does work. Any suggestions?

Freedom7 · 10-04-2015, 08:26 AM

Quote:

Originally Posted by Freedom7

On my 2007 Allegro Bus, the Furnace will not come on. The Electric Heat Pump does work. Any suggestions?

Had this Bus since May 2015. It was so hot outside, we didn't think to test before purchasing.

40QDP 400HP

luvlabs · 10-04-2015, 08:41 AM

If you put the thermostat in Gas Heat and set the thermostat really high, what happens?

The normal lighting sequence is furnace fan starts, followed by ignition after 15 seconds, followed by heat output until thermostat is satisfied, followed by shutdown sequence (cool down).

So tell us what happens with your furnace.

Freedom7 · 10-04-2015, 09:03 AM

Both Heat Pumps work.
Turned Zone 1 Furnace on Gas on highest heat. I heard thermostat click, but no heat after 10 minutes. Also tried same on Zone 2. Same results. I don't know if Furnace uses two zones...

Freedom7 · 10-04-2015, 01:08 PM

Does the Propane Furnace have a Fuse? I have only found the Fuse that feeds the Thermostat...

Kiawah · 10-04-2015, 05:31 PM

Could be a bad thermostat

Freedom7 · 10-04-2015, 07:03 PM

I'm not sure how to test Thermostat. I'll see if I can find some "how to" information to troubleshoot it. Thanks

Kiawah · 10-05-2015, 06:32 AM

I just had similar problem when first trying to use the rear furnace this season, which turned out to be a bad thermostat. I know it originally worked, because I was in RedBay when built and saw it being checked.

Called Tiffin, and they walked me thru checking voltages on the heater and thermostat. It was obvious that the furnace was never getting power to turn on. New thermostat on it's way.

Freedom7 · 10-05-2015, 07:32 AM

I will "attempt" to check Thermostat. Both furnaces will not come on, but I really don't know what wires to check. Might just order new Thermostat anyway.
Is it easy to install?

luvlabs · 10-05-2015, 07:51 AM

Having two thermostats fail in the same mode is highly unusual. You can try rebooting them by either removing the cover and the small fuse or using the 12V switch by the door and turning it off. Wait a minute or two and turn the 12v back on.

It almost sounds like someone pulled the fuses for both furnaces since you are getting nothing when you switch to heat. Locate your 12v fuse panel and check the furnace fuses.

FreedomDream · 10-05-2015, 08:27 AM

Your thermostats are working or the heat pumps would not be coming on.

When the thermostat triggers the furnace, the blower is the first thing that starts working. The blower not only moves the hot air to the coach but also provides a source of combustion. If the blower fails to come on the rest of the sequence doesn't either. If the blowers are not coming on the problem is electrical and you need to find a bad fuse since this is a 12 volt system only.

If the blower comes on but no heat, then the problem could be no LP gas. Since BOTH are acting the same way, I would suspect they are not getting gas or someone pulled both fuses and I cannot think of a reason why anyone would do that.

Good luck and let us know how things work out.

Freedom7 · 10-05-2015, 03:04 PM

Problem Solved!

I "learned" that the Furnace is part of the Hydra-Hot system. There is no Furnace. My instruction manual states to turn on Furnace Heater to get heat. It didn't mention to turn on the Hydra-Hot Deisel switch first. Well, I must first turn on the Deisel Heater button on the Hydra-Hot control panel in addition to setting the Thermastat... Thanks for your replies and help...