Performance Issue
Furnace Short Cycling?
Frequent on/off cycling wastes energy and stresses components. Here's what causes it and when to get help.
Get Same-Day DiagnosisCommon Causes & Solutions
Dirty Air Filter
DIY FixRestricted airflow causes overheating and automatic shutdown.
Solution: Replace the air filter and monitor for improvement.
Thermostat Location Issues
DIY FixThermostat near heat source or draft causes incorrect readings.
Solution: Relocate thermostat or address heat source/draft.
Overheating
Call ProBlocked vents, dirty components, or fan issues cause overheating.
Solution: Professional inspection of heat exchanger and airflow.
Oversized Furnace
Call ProFurnace too large for home heats quickly, shuts down, repeats.
Solution: Professional assessment; may require system replacement.
Flame Sensor Issues
Call ProDirty or failing sensor doesn't detect flame properly.
Solution: Professional cleaning or replacement.
Faulty Control Board
Call ProElectronic controls malfunction causing erratic operation.
Solution: Professional diagnosis and board replacement if needed.
When to Call a Professional
- Filter replacement didn't fix the issue
- Cycling happens more than 3-4 times per hour
- You notice uneven heating in your home
- Energy bills have increased significantly
- The furnace makes noise when cycling
Related Issues
Current Offers
Deals & Savings
REPAIR SAVINGS
$100 OFF
Furnace or Boiler Repair
Save $100 on any furnace or boiler repair service. Diagnostic fee credited toward repair.
Always Available