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What to Do if Your Furnace Doesn’t Blow Air

In Northern Virginia, furnace problems are more than just a simple matter of inconvenience. If your furnace breaks down in the middle of winter, it could turn your home into an icebox until the service technician can get a look at it. Naturally, if your furnace isn’t blowing air at all, it’s the sign of a problem in immediate need of correcting. Here’s what to do if your furnace doesn’t blow hot air.

Four common causes you can check to determine why your furnace isn’t blowing hot air.

  • Thermostat: Make sure your thermostat is on and programmed to the proper temperature. A simple fix for your system is to ensure the system is set to heat and not air conditioning. Also, make sure the fan is programmed to “Auto” instead of “On.” If the temperature settings are programmed correctly, you can check the breaker box to determine if the circuit breaker has been tripped. These are simple steps, but they could explain a lot. If it’s a simple matter of the wrong setting or that the circuit breaker was tripped accidentally, it will save you a lot of grief. It may also suggest whether or not the thermostat is malfunctioning, giving the repairmen a good place to start.
  • Pilot Light: If you’ve got a gas furnace blowing cool air, check that your pilot light hasn’t gone out. First, try relighting the pilot light. If it stays lit, problem solved. If the light doesn’t stay lit, there could be an issue with gas-flow. Make sure the gas valve on your furnace is turned to the On position. If your pilot light won’t stay lit, the thermocouple — the copper rod that controls the gas flow and hits the flame — needs to be replaced. You can replace the thermocouple yourself or hire a professional to assist you.
  • Furnace Malfunction: If the furnace is on and apparently functioning but the air itself isn’t blowing, you’re likely looking at an internal malfunction. It’s probably the fan motor, which may have overloaded and thus isn’t running the fan to blow hot air into your system. In some cases, the fan belt may be broken or the fan itself may be misaligned in some way. Another possible cause is that a leak has sprung up in your ducts somewhere or there is a blockage in the system. In both cases, the flow of air will be severely restricted, perhaps even stopped entirely.
  • Check Air Filter: Though an unlikely cause for your furnace not blowing air, another possible explanation could be that your air filter is clogged with dust and debris that’s restricting air flow through your system. Make sure to change your filter every three months to prevent buildup.

Whatever the potential cause is for your furnace not blowing air, shut off the furnace to prevent strain on the system and contact a qualified service representative. Throughout Northern Virginia, furnace repair is handled by the experts at Oasis Heating, Air Conditioning & Refrigeration, Inc. Our trained professionals will pinpoint the problem and recommend repairs to get your furnace back on its feet as quickly as possible. Call us today or fill out our online form to schedule an appointment.

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