Westinghouse
Thermostat or control short cycling
Furnace cycles on and off rapidly (every 1–5 minutes) without maintaining temperature.
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Possible Causes
Thermostat located near heat source or supply register, Thermostat anticipator or cycle rate set incorrectly, Loose thermostat wiring causing intermittent call, Oversized furnace for the space
How to Fix / Troubleshooting
Steps:
- Check thermostat location; it should be away from direct sunlight, supply registers, and exterior doors.
- Ensure thermostat is firmly mounted and level (for older mechanical models).
- Inspect thermostat wiring for loose connections at both thermostat and furnace.
- Review thermostat settings for cycle rate or heat anticipator; adjust according to 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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