Northstar igloo furnace

Hi, if you don't have a bug screen over the exhaust port it might have a wasp nest. A dirt dobber nest or some other in it. Also check the inside air outlet. Something might be blocking it. I had sort of the same last year in first start up. Also there is a air flow switch that might be stuck hope this helps.

Thanks for the suggestions driftwood. I will take a look at these potential problem areas. Hopefully the problem is minor.

Hope so too, I've already used the heat last weekend was in the upper 30's I also don't have a screen over the port but last summer I fired up the furnace just to make sure no bugs decided to settle in the heater. I know lame , but forgot to get a screen when I visited a RV supply business .good luck in your find. Jeff

Is the fan coming on when the thermostat closes ? When the fan comes on the sail switch should close and after a time delay the ignition operates and fires the gas...

Is it trying to light, but not? Or just not blowing/ trying to light at all

When I turn thermostat up, nothing happens. The fan makes no attempt to come on. Again, the only thing that happens is the "diagonistic" light flashes.

Check your 12 Volt power going to the furnace, is the fuse in the panel blown, is the circuit breaker in the furnace in the tripped position.

Sounds like a power problem.

Thanks wood hog...going to check power tomorrow and will update.

Thanks for the help on furnace everyone. The problem ended up being a bad circuit board. Again, thanks for the help!