Why is the Furnace Short Cycling?

If the furnace is kicking on and off frequently, it could be short cycling. If this issue isn’t fixed in a timely manner, it could cause lasting damage to the HVAC system. Generally, the heating system should be running three to six times an hour. If it’s more than that, there is usually a problem.

It doesn’t just point to one problem though, it could signal a variety of furnace problems. Homeowners can do some simple troubleshooting to see what the issue could be before calling Diamond Heating and Cooling.

Start by looking at the air filter. This is usually the culprit when the furnace starts short cycling. The good news is that it’s also the easiest to fix. If the filter hasn’t been cleaner or changed in a while, the air can’t get through, impacting the efficiency of the furnace. Changing the air filter should fix the issue right away.

If the filter isn’t the issue, it could be a problem with the thermostat instead of the unit. Check the settings to make sure they are set correctly. If the thermostat is being hit by the sun or is close to a heat source, it could turn off simply because it senses the home is too warm.

If the thermostat is set correctly, it could be one of the following issues:

  • Corroded flame sensor
  • Improperly sized heating system
  • Foreign objects in the chimney or air vents

At this point, it’s time to call Diamond Heating and Cooling. The problem is most likely with the unit, and should be fixed by an HVAC professional. Diamond Heating and Cooling can diagnose the problem and get the system running correctly. If the system is the incorrect size for the home, they can also install a brand new HVAC system.

One way to limit the issues a heating and cooling system experiences, is to get on Diamond Heating and Cooling’s HVAC maintenance plan. Visit their website to learn more about their Silver Membership Club and how it can save homeowners a ton of money on heating and cooling related expenses.


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