Luxaire
Short Cycling
Furnace cycles on and off frequently (short cycling) without reaching set temperature.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Oversized furnace, Dirty flame sensor causing dropout, Thermostat located near heat source, Restricted airflow
How to Fix / Troubleshooting
Safety: Repeated short cycling can stress components. Address causes promptly.
Steps to check:
- Filter and vents: Replace filter and open all vents.
- Thermostat location: Ensure thermostat is not near supply registers, space heaters, or direct sunlight.
- Clean flame sensor: With power off, remove and clean the flame sensor as described earlier.
If short cycling continues, a technician should check temperature rise, gas input, and thermostat anticipator or cycle settings.
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Repair Difficulty
Medium
3/5
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