Why is my gas furnace not working but the pilot light is on

Most homeowners find out that their furnace is out of order when they turn it on at the start of winter.

  • At this time of the year, most HVAC companies are busy with other projects and might take long before attending your issue.

Therefore, you need to troubleshoot and fix these problems to restore your HVAC system to normal functioning. If your pilot light is on, but your furnace is not working, your HVAC system could be lacking gas. Check the shut-off valve located outside the house to verify that your gas supply is on. Double-check the gas supply is on by turning on another gas appliance such as the stove. If it works, your gas supply to the furnace could be shut or obstructed. A disrupted gas supply to the furnace avails little gas to the HVAC system, which doesn’t meet the minimum amount of gas necessary to ignite. Inspect the furnace for leaks. They could also inhibit the flow of gas into your system. If this is the case, you need to open all your windows, leave the house and call an HVAC professional to evaluate the situation. Check your HVAC equipment’s filters for dirt or clogs as they may inhibit airflow through your furnace. Clean all blocked registers and vents and replace the air filters to enable steady gas flow for the system’s optimal operations. Inspect your furnace’s switch and ensure it is in the ‘on’ position. Check the circuit breaker for a possible power trip. Lastly, you may want to check your thermostat and ensure it is set correctly and has no dirt and debris inside. If you can’t restore your system to normal, call an HVAC contractor to perform a thorough diagnosis and repair.


Air conditioning maintenance