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Reasons Your Furnace Overheats

The mild weather in Escondido, CA means that our winters are quite pleasant by and large, but that doesn’t mean much when your furnace overheats and shuts down. Most homes in the area use forced-air furnaces fed by gas, which is inexpensive and effective, but still runs the risk of overheating components. Modern furnaces will shut down automatically when that happens – sparing your system any damage – and if your furnace suddenly switches off for no reason, or continues to cycle on and off, you may be facing an overheated furnace.

The causes of furnace overheating are varied, but can include the following:

  • Dirty components, which increase friction and the create excessive heat. This is particularly a problem if you haven’t run your system in a while or if you haven’t changed the filter recently.
  • Hot air trapped in the furnace. Blockages can trap hot air in the chamber instead of blowing it through your home, as can faulty fan motors, closed vents and damage to the ducts themselves.
  • Individual components, overcome by stress and wear, can overheat and cause the entire system to shut down. In most cases, the problem can be fixed by replacing the faulty component, which should only be undertaken by a professional technician.
  • Short cycling, which is the furnace turning on and running for a brief period, then turning off, only to turn on again a few minutes later. In some cases, this can be caused by a malfunction within the system. In other cases, it’s because the furnace was sized improperly for the space of your home, in which case it will need to be replaced.

Luckily, most furnaces will alert you to the problem simply by shutting down. When they do, turn off the system – even if it isn’t running – and call on the professionals at Aspen Cooling & Heating to get it fixed immediately!

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