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Old 02-15-2013, 09:14 PM   #1
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1960 22' Safari
Summerland , California
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1972 Safari heater problem

We have a problem with a 1972 safari furnace. After the furnace is started and is running for awhile the pilot shuts down causing the burner to stop and then continues to blow cool air into the space.
Anyone know about this and how to fix it.

Thanks
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Old 02-15-2013, 10:00 PM   #2
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1972 25' Tradewind
North Vancouver , British Columbia
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If it is equipped with the Suburban NT22a, there was a recall for that furnace back in the day. If it was never repaired, you may want to consider replacing it with a new model. If you're certain that it had the recall repair done, then you could explore repairing the problem you're having (I'm sorry I don't know the solution to your actual problem).
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Old 02-15-2013, 10:45 PM   #3
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Have you checked the exhaust port? It could be blocked.
If so, the high temp limit could be shutting the burner off. The sail switch may be a problem as well. You could also have a bad thermocouple.
When you light the pilot. How does the flame look?
I would start by cleaning any residue from the thermocouple. If that doesn't work. Try replacing the thermocouple. Then make sure it is in the flame if the pilot.
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Old 02-16-2013, 01:06 AM   #4
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1974 Argosy 20
2014 20' Flying Cloud
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What TG T said plus the cast iron burner may be filled with rust causing a poor flame which then starves the pilot.

Suburban no longer supports any parts for those pilot light models either.

The furnace is 41 years old now. It may be time to consider just replacing it for safety reasons. Combustion chambers rust out, the recall mentioned above may not have been done, and pilot light furnaces are a PITA vs. the new electronic ignition ones.
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Old 02-16-2013, 10:23 AM   #5
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1960 22' Safari
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Thanks so much for the info, I will check this out.

Best
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Old 02-16-2013, 10:33 AM   #6
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Quote:
Originally Posted by silverkeeper View Post
We have a problem with a 1972 safari furnace. After the furnace is started and is running for awhile the pilot shuts down causing the burner to stop and then continues to blow cool air into the space.
Anyone know about this and how to fix it.

Thanks
Could be a weak pilot light or a weak thermocouple.

Andy
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