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Heating problem the heater in the central heating is not getting turn on but the fresh air and cooling i can still turn on

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The tstat sounds like it is not connecting the white and red terminals which is usually the heat cycle if it is a gas furnace if so to check I take tstat cover off and jump white terminal to red terminal this is the standard heat position the unit should fire the heat cycle if not a gas funace let me know what type of unit you have hope this helps

Posted on Jan 11, 2009

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If it's "dual fuel" like heat pump with gas heat, the heat on the heat-pump side won't "feel" warm in the extreme temperatures we've seen in much of the country lately.....2nd stage gas will feel MUCH warmer. If purely electric, 1st stage heat may be off due to a manually resettable high limit switch/ bad heat contactor (giant relay), or a misapplied or defective thermostat. NOTE: if somebody recently painted OR wallpapered, AND it's a mercury-bulb T-stat, It HAS to be level and the connections must be tight!

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My central heat won't turn on. It's on automatic and won't turn on. When turned to On and Heat, it just blows cold air.


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Have a Amana a/c heater central furnace. Model number PGA30R0452A. The a/c part works fine. The heater part does not turn on sometimes. We have to keep turning it on and off to get to work. No matter what...


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1 Answer

The heater in my central heating is not getting turn on but the fresh air and cooling is getting turn on


Check the pilot light.Older standing pilot systems use thermocouples to verify the pilot is burning before the gas valve opens.If the pilot wont stay lit replace the thermocouple.
Newer systems light the pilot.On a call for heat the igniter lights the pilot. When the heat is verified the gas valve opens . Some systems use an circuit board with flashing led lights to help troubleshooting.

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1 Answer

Central air and heating, not cooling


Need to have checked out by a diagnostic ac man.

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