Goodman
Short Cycling
Furnace cycles on and off frequently (every few minutes) 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 filter, Thermostat anticipator or cycle rate set incorrectly, High limit opening due to airflow issues
How to Fix / Troubleshooting
Safety: Turn off power before accessing internal components.
Steps:
- Replace filter: Install a clean filter to ensure proper airflow.
- Check vents: Open all supply and return vents.
- Thermostat settings: For mechanical thermostats, adjust the heat anticipator according to furnace control current. For digital thermostats, set the cycles-per-hour or differential per manufacturer guidelines.
- Observe limit trips: If burners shut off but blower continues, the high limit may be opening. Address airflow restrictions and have a technician check temperature rise.
If short cycling continues, a professional should evaluate furnace sizing and duct design.
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Repair Difficulty
Medium
3/5
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