When it’s cold outside, you need heat inside. The last thing you need is for your furnace to blow cold air, especially if you have small children or elderly people in your home. While there are multiple reasons why your furnace may be blowing cold air instead of warm, there are a few quick and fairly easy things you can try yourself to get the heat going for you and your family.
The first thing you should do is try rebooting your heating system. Because modern furnaces are computer-controlled, there could be a glitch preventing fuel from being delivered. Try turning the furnace switch to “Off,” then wait 30 seconds for the system to reboot and see if this solves the problem. If not, it’s time to look more deeply.
The second thing you should try is a series of checks, based around the four major components that keep a furnace working properly. These components are the fuel system, the burners, the fan and the duct work.
Just like with any mechanical system, if one component isn’t working properly the whole system may malfunction. Depending on the type of furnace you have, one or more of the following issues could be the reason your furnace is blowing cold air instead of warm air to heat your home. Conduct a quick series of checks against the following:
Fuel provides heat for your furnace. Without it, only cool air will blow. On gas furnaces, gas supply valves must be open to allow fuel to light the burners. Electric furnaces must be switched on at the breaker panel for the furnace “On/Off” switch.
If your air filter is old and clogged, it can block the airflow and even shut down the furnace burner.
If a condensate hose is plugged or the reservoir float valve will not open, the switch won’t let the burners light, whether the fan is blowing or not.
If you have a gas furnace, the burner may become clogged. Additionally, a bad gas valve, bad thermocouple or faulty electronic ignition can keep your fuel supply from being delivered to the burners.
Bad ductwork can inhibit airflow even if your furnace is in tip-top shape. It may not be all the ductwork, but if you are experiencing more warmth in one area of your house than another, it could very well be the ductwork is poorly installed or faulty.
While there are other possibilities, these should cover the basis. If you run through this series of checks and your furnace is still blowing cold air instead of warm, give us a call. Our fully-licensed and certified technicians will get the job done right, guaranteed. And even if you do get heat flowing into your home, an A#1 Air tune-up will ensure your furnace continues to run at maximum efficiency. Contact us now for one of our great offers on a complete heating tune-up, including our Tune-Up for Tots Special