Why Won’t Your Heating System Turn ON?

January 23, 2023

The heating system supports you during winter by ensuring health and comfort. It provides filtered, fresh, and warm air, helping to prevent health risks. However, a poorly maintained or neglected HVAC system may fail to deliver this comfort.


Skipping annual heating services in Lawrenceville, GA, can deteriorate your heating unit. The worst outcome of a neglected heater is that it may stop turning on altogether. Below are steps to help identify why your heating system might not be working.


Heating System Not Turning On



Check All the Switches and Settings


If your heating system isn’t turning on, verify that all switches are in the correct position. Ensure the main power supply is on, the thermostat is set to heating mode, the fan is on “Auto” mode, the circuit breaker hasn’t tripped, and the gas valve is open.


Adjust the thermostat by increasing the temperature by 5 degrees to see if the system responds. If the thermostat doesn’t respond, schedule a repair service for professional assistance.


Verify the Pilot Light


Check if the pilot light is igniting the flame properly. The flame should be blue—yellow or red flames indicate potential gas leaks. If the pilot light isn’t working, the gas supply may be insufficient, the valve may be damaged, or the light may be dirty.


Turn off the main power and gas supply, clean the pilot light using sandpaper as per the manual, and restart the system. If the issue persists, hire a professional for HVAC repair in Lawrenceville, GA.


Clean Your Heating System


Accumulated dirt can block air vents, drain lines, and condensers, often due to a dirty air filter. Replace your air filter every 60–90 days. Use tools like a vacuum, water hose, and cleaning spray to maintain a clean furnace. Regular maintenance can prevent operational issues.


Inspect Heating Components


Faulty components like a cracked heat exchanger, broken ignitor, or damaged capacitor may prevent your system from turning on. Overheated furnaces can degrade blower capacitors. If components are damaged, consult a technician for heating services in Alpharetta or nearby areas.


Inform the HVAC Professional


If you’ve inspected the system and tried troubleshooting without success, it’s time to contact a professional. Air Master Heating and Air Inc. offers long-term warranties and effective heating and cooling services. Call (770) 691-1475 to have your HVAC system expertly repaired.


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