When the temperature drops to extreme levels, a malfunctioning gas furnace can be a significant inconvenience and a potential safety concern. Several factors can contribute to a gas furnace stopping working in extreme cold, and it’s essential to identify the root cause to restore heat effectively. In this comprehensive guide, we’ll explore the common issues, troubleshooting steps, and solutions to get your gas furnace back up and running during the coldest weather.
What Causes a Gas Furnace to Stop Working in Extreme Cold?
1. Is the Pressure Switch Faulty?
A faulty pressure switch is a common culprit when a gas furnace stops working in extreme cold. The pressure switch monitors the airflow in the venting system and ensures proper combustion. If there are restrictions in the venting or issues with the vacuum hoses, the pressure switch may fail, causing the furnace to shut down.
2. Are There Condensation Issues?
Condensation problems can also lead to a gas furnace malfunctioning in extreme cold. If the condensate drainage system is not functioning correctly, the condensate can back up into the inducer, causing the pressure switch to drop out and the furnace to shut off.
3. What Other Components May Be Affected?
In addition to the pressure switch and condensation issues, other components can also be affected by extreme cold temperatures, leading to furnace malfunction. These include problems with airflow, the inducer motor, the thermostat, and electrical connections.
How to Troubleshoot a Gas Furnace That Stopped Working in Extreme Cold
1. How to Check the Venting System and Vacuum Hoses?
Start by inspecting the venting system for any blockages or restrictions, such as debris, ice, or improper installation. Next, check the vacuum hoses for signs of moisture or ice buildup, as this can cause the pressure switch to fail.
2. How to Inspect the Condensate Drainage System?
Ensure the condensate trap is not backing up into the inducer, which can cause the pressure switch to drop out. Check for any blockages or freezing in the condensate lines and verify that the drainage path is clear and properly plumbed.
3. What Other Components Should Be Checked?
Inspect the airflow by checking the air filter and ductwork for any issues. Verify that the inducer motor is turning on, and check the thermostat and electrical connections for any problems.
Additional Considerations for Gas Furnaces in Extreme Cold
What If the Furnace is Fueled by Propane?
If your furnace is fueled by propane, extremely cold temperatures can slow down the rate at which liquid propane changes to gas, potentially causing the furnace to stop working. Consider insulating the propane tanks or taking other measures to maintain the propane supply.
Reference:
- Why Is My Furnace Not Keeping Up With The Cold Weather?
- Heater works sporadically, seems to stop working at freezing temperatures
- 6 Common Furnace Problems in Cold Weather
By following these troubleshooting steps and addressing the potential issues, you can effectively diagnose and resolve the problem causing your gas furnace to stop working in extreme cold weather. Remember to prioritize safety and consider seeking professional assistance if you’re unsure about any of the repairs or maintenance required.
