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kreipe's avatar
kreipe
Explorer
Oct 13, 2014

Dou Thermo Furnace burner and fan going but no heat.

I've got a Duo Therm model 90030-812 C and have a recent and unusual issue. The blower comes on and the furnace fires about 5 seconds later and stays lit (you can hear it). The problem is that the ...
kreipe's avatar
kreipe
Explorer
Oct 13, 2014
Thanks guys. I just removed it from the RV and I see a small hole where the exchanger meets the burner box.

So I'm guessing the issue was caused because blower air was flowing into and affecting the combustion air.

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