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Old 10-12-2014, 06:00 PM   #1
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1973 Argosy 24
x , Missouri
Join Date: Mar 2014
Posts: 2
furnace won't blow hot

I have a 73 argosy 24. I have never had any experience with gas furnaces. I got the pilot light to stay lit, the fan kicks on when i turn on the thermostat but i don't ever get any hot air to blow. Any suggestions?

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Old 10-12-2014, 06:25 PM   #2
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1997 30' Excella
1961 26' Overlander
1954 22' Flying Cloud
1981 28' Airstream 280
San Antonio , Texas
Join Date: Jul 2009
Posts: 1,400
It sounds like the gas valve is not opening. Also if this is the original Suburban furnace STOP trying to light it. These furnaces have been known to explode and at the very least put out carbon monoxide. Take it out, replace it with a modern one and be safe.

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Old 10-12-2014, 07:29 PM   #3
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1979 Argosy Minuet 6.0 Metre
Spruce Grove , Alberta
Join Date: Jul 2013
Posts: 35
Had a similar issue this year. Checked everything over, pulled the furnace, and it blew hot on the workbench. Turns out it was the regulator. New purchase two seasons ago. Put on another one from the pile (advantages to being a pack rat), and the 20year old standby worked perfect.
Life would be so boring, if it weren't for some gremlins in heating, electrical and plumbing systems.
Good luck
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Old 10-13-2014, 08:13 AM   #4
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Livingston , Texas
Join Date: Nov 2012
Posts: 58
Your problem could be any number of possibilities from low voltage, to a bad limit switch, to a bad sail switch, to a gas supply issue, to .......

If you do a web search of for "trouble shooting a suburban RV furnace" on Yahoo you should see a listing "Suburban furnace and service manual from BR Wholesale RV and Marine", which will take you to a PDF that has a trouble shooting guide and chart. FWIW there isn't a step in the chart that says "replace furnace because it is old"
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