There can be several different reasons why your furnace is blowing cold air. Before you call a heating and air conditioning repair company, there are a few things you check yourself to determine whether this is the cause of the problem.

  1. Does the furnace blow cold air constantly? When the furnace first turns on, the air will not instantly be warm. It takes time to force out the existing air in the duct work, which can feel cool before warm air follows. If it does not warm up, then you need to continue troubleshooting the problem.
  2. Is the fan set to the “on” position? If you fan is set to the “on” position, it will continue to run, even when the furnace is not generating warm air. Since the air is not being heated, it will feel cold.
  1. Is the thermostat turned on and set the desired temperature? This might seem like a “no-brainer,” but it is still something you will want to check to verify because the AC could be turned on by mistake.
  2. Is the pilot light lit? If you have a gas furnace, verify the pilot light is lit. If not, even though the furnace might run, it will not create warm air. WARNING: Before attempting to relight the pilot light, shut off the gas and ventilate the room. It is best to wait a few hours to ensure all the gas has been removed from the surrounding air.
  3. Does the furnace unit seem hot when you touch the exterior? The furnace could be overheating and shutting down because it is not getting proper air flow. If it is, the furnace filter is most likely clogged and needs to be replaced.

After checking the above items, and if none of these resolves your cold air issue, then it is time to call in a professional, as there could be certain parts and components inside the furnace that have worn out and need to be replaced. Call Kaiser Air Conditioning at (805) 988-1800, now, to schedule repair service today!