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Heat will not turn off

    1. Check the thermostat and lower the temperature setting below the current room temperature.
    2. Inspect the thermostat wiring to make sure no wires are loose or disconnected.
    3. Clean the thermostat contacts with electrical contact cleaner spray to ensure a proper connection.
    4. Test the thermostat by disconnecting it from the HVAC system. If it still runs, the thermostat is defective.
    5. Inspect the contactor relay – if stuck closed, it will allow continuous operation. Replace if faulty.
    6. Make sure the delays on the heating cycle are programmed correctly and not set too short. Adjust as needed.
    7. Check if limit switches are functioning properly and cutting off operation at the right temperatures.
    8. Examine the heat anticipator and adjust setting to match the amp draw of the heating system.
    9. Make sure the blower fan shuts off after the heating cycle ends. If not, fan control may be faulty.
    10. Call an HVAC technician if basic troubleshooting does not reveal the issue. May require control board diagnosis.
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