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Old 01-20-2012, 01:40 PM   #1
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Carrier 58 MCB gas furnace


Have a carrier furnace that starts blowing cold air. Replaced thermostat but no change. Every time repair man comes finds no problem heat works. Found that killing breaker to furnace allows heat to work again. tired of doing that. what should I check and where next time cold air starts

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Old 01-20-2012, 02:15 PM   #2
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Carrier 58 MCB gas furnace


http://www.docs.hvacpartners.com/idc.../58mcb-4sm.pdf

Check the LED display on the furnace before resetting it next time.


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Old 01-20-2012, 02:18 PM   #3
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Carrier 58 MCB gas furnace


Quote:
Originally Posted by lojak37 View Post
Have a carrier furnace that starts blowing cold air.
How long does it run before it shuts down?
How long after it shuts down before it'll start up again?
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Old 01-20-2012, 03:54 PM   #4
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Carrier 58 MCB gas furnace


I feel like a broken record, but try removing and cleaning the flame sensor........
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Old 01-20-2012, 04:22 PM   #5
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Carrier 58 MCB gas furnace


Yeah Harley
Those drafts in the email box for copy & paste diagnostic responses make things easier..
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Old 01-24-2012, 10:05 PM   #6
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Carrier 58 MCB gas furnace


Check the condensate drain for a blockage or slow drain.
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Old 01-25-2012, 02:30 AM   #7
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Carrier 58 MCB gas furnace


Like the man says "check the diagnostics before you break the power with the breaker"

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