Westinghouse
Thermostat or control short cycling
The furnace cycles on and off rapidly (every 1–5 minutes) without maintaining temperature.
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Possible Causes
Thermostat located near a heat source or supply register, Thermostat anticipator or cycle rate set incorrectly, Loose thermostat wiring causing an intermittent call, Oversized furnace for the space
How to Fix / Troubleshooting
Steps:
- Check the thermostat location; it should be away from direct sunlight, supply registers, and exterior doors.
- Ensure the thermostat is firmly mounted and level (for older mechanical models).
- Inspect thermostat wiring for loose connections at both the thermostat and furnace.
- Review thermostat settings for cycle rate or heat anticipator; adjust according to the thermostat manual for gas forced-air systems.
- If short cycling persists, a professional should evaluate furnace sizing and ductwork.
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Repair Difficulty
Easy
2/5
Required Part
Wall Thermostat
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