Question about Honeywell Programmable Thermostat Heater

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Furnace blows cold air

The furnace turns on but the thermostat will not heat past 66 degrees and only blow cold air

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  • Chandler Ede
    Chandler Ede May 11, 2010

    Can you give us any make and model number of the heating system?

  • Robotinner May 11, 2010

    this may not be a Stat problem but let me ask if the filter is clean?

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Sometimes the fans kicks in by time ---or by heat...even if the heat cycles dont starts . Is this gas or electric,, name brand,.... model # ect...ect..

Posted on Dec 19, 2009

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Check and make sure the filter is clean. This sounds like a restriction in the system. If the unit has central cooling make sure ther indoor evaporator coil is clean at the furance.The unit may be cycling the burners on and off at the high heat limit , fan/limit control. You can also eliminate the thermostst from the furance. Turn power off at the furnace and disconnect the wiring from the thermostat. Jumper the red and white wire together. Turn the furnace back on. The furance should run in the heating mode. Try this and see if the problem is still there.

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well ? Does It get cold @ 66 Degrees? And If so.. Aint 66 degrees cold?

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