We can help better in this case if you can give us the make and model of both the furnace and the fridge.
Many of us can help you troubleshoot the issues but we do not know your exact camper. Getting us the make/model numbers on the items lets up look up that model and give better advice.
Most all of the furnaces have electronic ignition, so there is no pilot light to light. You said,
how do you light the furnace? I can turn the heat on and it all kicks on. But it doesn’t get hot so how do you light the furnace?
In this case, all kicks on needs to be broken down into,
When the call for heat comes on as you moved the T stat to call for heat, does the blower run?
There is a time delay from the time the blower turns on until the gas burner fires off. How long did you wait for the heat to come out? The gas burner running does make a different sound added to the blower already running.
The furnace nameplate is often inside the outdoor cover. Find the outside cover and remove the 4 screws. The blower motor should appear and the make/model will be there. Take pics of it too, they really help.
On the fridge, here we need to make/model to help better as well. And pics of the outside back of the fridge with the vent cover off helps too. Before we tell you something that does not fit your fridge, find the make/model number. On the fridges, the name tag is often inside the fridge compartment on the left or right side by the door gasket.
Some of the really old fridges light the gas burner different. Need to know which you have. You mentioned when on electric,
Also how do you light the fridge? When the fridge is plugged in through electric it does not turn on so I’m guessing maybe the condenser is junk? How can I test to figure it out?
If this is still the original RV fridge, there is no gas compressor like a normal home fridge. These RV fridges are gas absorption fridges and have no motor in them. They actually create heat to work inplace of making cold. Odd I know, but they is how they work. They can take up to 8 hours to cool down the fridge compartment once started if they are working right. But they can be tested they are working long before that. Can't tell yet if yours is going bad or not.
Hope this helps
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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