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My York gas furnace blows cold air every now and then. I…

Customer Question
My York gas furnace...

My York gas furnace blows cold air every now and then. I turn down the thermostat to shut it off. I wait about 30 seconds then turn up the thermostat and 9 out of 10 times it blows warm air when it comes on. My Suburban propane dealer tech has NO idea why. He told me to see if there is a recall on the system. Please help me! Vicki

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Thermostat is set correctly. All filters were cleaned in October 2017.

Contractor's Assistant: Do you plan on doing the work yourself?

NO, we are not qualified. The Suburban propane tech wants to do it if I can find out what is wrong with it.

Contractor's Assistant: Anything else we should know to help you best?

Is there a recall on the system?

Submitted: 8 months ago.Category: HVAC
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Answered in 5 minutes by:
1/1/2018
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 24,844
Experience: 40+ yrs. experience as a licensed oil & gas technician.
Verified

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

No recall on the unit. Generally when a furnace blows cold air it's because of an open limit circuit. Basically the furnace overheats. This could be due to a clogged AC coil if you have AC or undersized ductwork or possible blocked or closed vents.

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Customer reply replied 8 months ago
There is NO AC on this furnace. There are no blocked or closed vents.
HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

I'd suggest he replace the limit sensor/switch. It could be defective.

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HVAC Technician: Rick, HVAC Supervisor replied 8 months ago

There could also be an iffy connection in the limit circuit. Bot***** *****ne is blowing cold air in heat mode is a limit circuit fault.
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