Feb 01 , 2019

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Our desert nights are cooler and you find your heater is coming on more often. You don’t want to feel a blast of cold air when you are expecting warm comfort.  If you are feeling cold air, it is may be due to the following reasons:

  • You may have a leaky air duct – this will happen when your heating system is unable to reach the desired thermostat temperature, your electric bill is higher than usual and your home is getting really dusty. This problem needs a professional inspection to find the leaks and provide you with the best solution.
  • The fan limit switch – if the air coming from you vents starts with a cool temperature, then warms up only to return to cool again before the fan cuts off between cycles, the fan limit switch needs adjustment. The fan is located just under the hood of your furnace and indicates when your furnace blower should come on.  When the fan limit switch is correctly set, you should never feel cold air coming from your vents when the heat is on.
  • Overheating furnace – this occurs when the furnace blows starts with hot air, then turns to cold air and finally shuts off altogether . This is probably as a result of the exchanger getting too hot causing the fan limit switch to shut off.    Check to see your air filter needs replacing and make sure all supply vents are in the open position.
  • Thermostat setting –your thermostat should be set to the “heat” position and not cool. Also check to make sure your fan is not set to the “on” position and you are using the “automatic” setting instead.   When the fan is set to “on” position, your fan will run continuously regardless if your furnace is producing heat and the air being pushed into your home will be cold.   You’ll also save money by not having the fan continuously on.

If you are still getting cold air from your unit, contact Family Air to troubleshoot your problem.  We’ll get your furnace working probably again and put you back in warm comfort!