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HoosierDaddy · 11-25-2007, 12:09 AM

Hi Tom,
Check the furnace exhaust outlet. I once had wasps build a nest in mine. I also had an igniter not work and I'm sure I cleaned and adjusted it from inside the coach...The end of the furnace could be opened up to access it. That was on my 1978 which had three Suburban furnaces. I'm not sure how your 1990 may differ but hopefully the concepts are similar.

11-25-2007, 12:09 AM	#3
HoosierDaddy Senior Member Join Date: Mar 2006 Location: Indiana Posts: 424	Hi Tom, Check the furnace exhaust outlet. I once had wasps build a nest in mine. I also had an igniter not work and I'm sure I cleaned and adjusted it from inside the coach...The end of the furnace could be opened up to access it. That was on my 1978 which had three Suburban furnaces. I'm not sure how your 1990 may differ but hopefully the concepts are similar. __________________ 1993 Newell 45'#316, 1976 Trans Am 455, 1967 GTO, 1953 Chevrolet 3105 (panel truck),1952 Chevrolet 3600,1969 Airstream Overlander. Always fixing something!