Winter has begun, and the temperatures have dropped considerably in states like Connecticut. In chilly mornings and nights, a working furnace feels like a true blessing with its comfy warm air. However, that entire cozy feeling can vanish into thin air if the same unit starts blowing cold air.
There are many reasons a furnace starts blowing the cold air, despite the fact that the system is switched on. This post will discuss all the possible reasons why your furnace has started freezing you out with cold air in the coldest season.
If your furnace is not blowing warm air, it could be due to a dirty and grubby air filter. If you haven’t cleaned and replaced the air filter in a while, be prepared for this outcome. When the air filter can’t let the required air pass, it results in overheating inside the furnace, leading to the burner shutdown.
If your furnace blows cold air due to overheating, you should switch it off immediately. Running an overheated furnace can lead to some serious fault that only experts service of furnace repair in Fairfield, CT, can resolve.
Malfunctioning Pilot or Valve
If you are using an old furnace, you may start getting cold air due to the pilot shutting down because of a gust of air. You need to relight the pilot to get the furnace back in order. If you are not comfortable doing it yourself, consider calling an expert to relight the pilot flame and identify and fix why it keeps getting extinguished.
Problem with the Electronic Ignition
If you use any latest electronic furnace, it may undergo an ignition malfunction resulting in the unit blowing out cold air. These new furnace units use hot surface ignition and intermittent pilot lights that consist of multiple parts. A fault in any of those components can set off a cascade reaction, resulting in shutting down the whole furnace.
If it is an electronic ignition malfunction, you don’t have any other option but to call for a seasoned furnace repair experts.
Faulty Flame Sensor
Many times a furnace takes the right start but soon starts throwing cold air. This usually happens because the flame sensor within the unit doesn’t work properly. For instance, a worn-out sensor or the one buried in grime can continuously shut down the burner. If the furnace air is turning warm to cold as you start it, have its flame sensor inspected by professionals for cleaning or replacement.
The thermostat may also cause your furnace to turn cold. For instance, a thermostat setting changed from AUTO to FAN can cause the furnace to work just with the blower fan with the switched-off burner. Moreover, a newly installed but incompatible thermostat may also wrongly adjust the furnace setting where it starts blowing out cold air.
Celco Heating and Air Conditioning is a reliable contractor for all HVAC services and repairs in Fairfield, CT. Our experts have sufficient experience in troubleshooting all sorts of residential furnace problems.