Any RV/Camper techs here?

I recently bought a 1996 Lite Craft popup truck camper and everything is in great condition! One problem though, when I'm plugged into 110AC everything works but when I'm running on the battery the furnace won't work. The blower motor is a DC motor so I know it's drawing power from the battery, even when I'm plugged into 110AC. So when I switch my converter to "battery" and turn the furnace on, the blower motor kicks on but not at full power and struggles then the furnace won't light. And yes it's a new fully charged battery so I'm lost with why the furnace won't run on the battery?[Dunno] I went to Camping World but they want $100 just to diagnose the problem[Rant1]. So if anyone here can think of what's going on or knows how to fix it....I'd buy you a steak dinner!!!

Yes, I work in the trailer industry and work on campers and living quarters, etc.

Quote:

Originally Posted by opie011

One problem though, when I'm plugged into 110AC everything works but when I'm running on the battery the furnace won't work.

Do you have a meter? Is it getting power at the furnace in DC?
Is the fuse blown going to the furnace?

Quote:

Originally Posted by opie011

The blower motor is a DC motor so I know it's drawing power from the battery, even when I'm plugged into 110AC.

Not necessarily. In fact it shouldn't be. It should be running off the AC/DC converter.
Sounds like a bad fuse or connection in/from the converter.

Quote:

Originally Posted by opie011

So when I switch my converter to "battery" and turn the furnace on, the blower motor kicks on but not at full power and struggles then the furnace won't light.

You really need to check your connections and ground including at the battery and fuse panel as well as at the furnace. The furnace can not light for a few reasons. It needs DC power of at least 12v for the furnace to light even on AC setting. If the motor isn't running at full power, it is probably not getting full power.(check connections and voltage) If the thermocouple is bad it will keep it from lighting as well.

Quote:

Originally Posted by opie011

And yes it's a new fully charged battery so I'm lost with why the furnace won't run on the battery?[Dunno] I went to Camping World but they want $100 just to diagnose the problem[Rant1]. So if anyone here can think of what's going on or knows how to fix it....I'd buy you a steak dinner!!!

Try the above, it you still can't figure it our PM me.

Camping World is a business whose whole purpose is to make money. Their average mark up on parts is about 30% over MSRP. Then if you become a member you can get parts there for MSRP. There are better choices.

PM sent Osprey[Beer]

This thread exemplifies why this board is great.

Folks helping folks.

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