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Troubleshooting a Gas Furnace - Furnace Repair

By Bob Formisano, About.com

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PROBLEM: Gas Furnace Blower Does Not Turn Off


Blower Does Not Turn Off - Always Running

Possible Causes

  • Thermostat set to fan continuous
  • Faulty fan limit control switch on furnace (if thermostat has no fan setting)

    Possible Repairs

  • Change thermostat fan setting
  • Reset or replace furnace fan limit control switch

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