Why is my furnace running but blowing cold air?
Your furnace may be blowing cold air because the filter is too dirty. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack.
Why is cold air coming out my vents?
Leaks in your ductwork means that cold, unconditioned air from inside your attic gets sucked into your ductwork. That cold air mixes with the warm air from your furnace, causing the air coming from your vents to feel considerably cooler than it should.
Why is my furnace blowing cold air instead of heat?
So Why Is My Furnace Blowing Cold Air Instead Of Heat? One of the most common causes of a furnace blowing cold air is not actually a repair at all. If you notice your furnace only blows cold air on occasion but your home is still maintaining its temperature than this may be simply a setting on your thermostat.
What happens if the pilot light on my furnace does not work?
If these fail to work your furnace will only blow cold air because there is no heat source to ignite the gas coming into the furnace. For furnace burner systems that use a pilot light, you simply need to relight that pilot light. This is best done using a long match.
What should I do if my furnace is not working?
Solution: Change the setting from Cool to Heat. If the thermostat was just changed and the furnace blows cold air when it should be heating, the thermostat was either installed improperly or, more likely, it isn’t the right one for the HVAC system you have. Solution: If it was professionally installed, call back the installer.
Why do I have a bad thermostat on my gas furnace?
Bad Thermostat. Your gas furnace will blow air through the system periodically, even if you do not have the heat on. It will circulate air constantly on certain air settings too. If you turn the heat on and this circulated air is not warm after a few minutes you may have a thermostat problem.
So Why Is My Furnace Blowing Cold Air Instead Of Heat? One of the most common causes of a furnace blowing cold air is not actually a repair at all. If you notice your furnace only blows cold air on occasion but your home is still maintaining its temperature than this may be simply a setting on your thermostat.
Why does my furnace blower fan stop working?
The function of the blower fan is to blow air across the furnace’s heating coils and disperse that warmth through the air ducts. If the blower fan stops working, you have a more serious problem at hand.
What to do if your air ducts are not working?
The first thing to do is check the vents in the room for any kind of obstruction. This can be furniture, bedding, or even the damper itself being closed. If you find closed or blocked vents, clear them away and feel for air flow. If the air begins flowing, you’re all set!
How does a furnace work and what does it do?
A furnace consists of a motor fan that blows air across heating coils, thus warming the air. This warm air is dispersed through the ducts of a household heating system to bring occupied living areas to the desired temperature.
