Frequent on/off cycling wastes energy and stresses components. Here's what causes it and when to get help.
Get Same-Day DiagnosisRestricted airflow causes overheating and automatic shutdown.
Thermostat near heat source or draft causes incorrect readings.
Blocked vents, dirty components, or fan issues cause overheating.
Furnace too large for home heats quickly, shuts down, repeats.
Dirty or failing sensor doesn't detect flame properly.
Electronic controls malfunction causing erratic operation.
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