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- SINCE 1981 -

Serving Orange County

- SINCE 1981 -

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Saddleback Plumbing Heating & Air Blog

Furnace Short-Cycling: Why It Happens, What to Do About It

If your furnace is turning on and off rapidly, more often than it should, it is short-cycling. This is a problem since it will put extra strain on the furnace, raise heating bills, and create repair issues. If you need help with a short-cycling furnace, call on Saddleback Plumbing. We have many years of experience in Rancho Santa Margarita, CA with furnace repair, installation, and other services. With more than three decades of helping Orange County stay warm, we are the contractor you should trust for furnace repairs.

Reasons that short-cycling may occur

The bad news first: if you have a new furnace that is short cycling, the problem may be that the furnace is the wrong size for your home. Putting in a furnace that is too large for the area it is supposed to heat is a common error that amateurs make, and one of the reasons you should only entrust furnace installation to experience professionals. If this is the case with your furnace, you usually must start over and have experienced technicians put in a new furnace.

Now for reasons a furnace might short-cycle that require less drastic repairs:

  • The air filter is clogged: This is a common problem, but thankfully it’s easy to fix. Check on the furnace’s filter; if it is congested with debris, change it (and keep doing it every month when the furnace runs on a regular basis) so the furnace receives proper airflow once more. If the furnace continues to short-cycle, call for professional repairs.
  • Thermostat trouble: A malfunctioning thermostat that reads the incorrect temperatures will cause a furnace to shut off before it should. Check to see that the thermostat isn’t exposed to drafts or extra heat. In some cases, the thermostat may need to be moved to a new location.
  • The furnace is overheating: Contemporary furnaces have safety devices to prevent them from overheating. These precautions will shut off the furnace if one of the heat exchangers grows too hot. This will cause short-cycling, and is a repair you need have taken care of immediately.

Please, do not attempt to investigate any furnace short-cycling on your own. Furnaces are complex appliances, and only trained professionals should repair them. This is especially true for a natural gas furnace, the most common type found in homes today. Let Saddleback Plumbing handle the job of finding out what problems are causing your furnace to short-cycle and fix them. We are the Rancho Santa Margarita, CA furnace service professionals who will see that the job gets done right.

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