Cleveland HVAC Blog

Can You Close Supply Registers in Unused Rooms?

Posted by Kim Nemecek on Fri, Jan 24, 2014 @ 10:44 AM

We had a call this week from a homeowner who was having trouble with her furnace. It would kick on for about 10 minutes, then unexpectedly shut off before reaching the set temperature. After another 10 minutes or so the heater would turn on again and run some more.

heating cleveland home supply registersShe mentioned that she had closed the registers in the basement and in some unused rooms. Little did she know that closing those registers caused there to be insufficient airflow moving through the furnace. This caused some of the furnace components to get too hot, which caused the furnace to shut itself off for safety. After it cooled a bit, the furnace kicked back on and the cycle continued.

Reopening some registers and adjusting others to be just halfway closed totally solved her problem, plus it kept her from further damaging her furnace.

What is the correct thing to do?

  • Some adjustments can be made to the supply registers. If one room is warmer than another, adjusting the damper a bit can help both rooms feel more comfortable. To make sure you’re not causing an airflow problem, have a technician check the static pressure to make sure there is sufficient airflow through the system.
  • Consider a zoning system. These systems install multiple thermostats in your home that allow for different set temperatures in each zone. Your furnace will only run in each zone as needed.
  • Have a home performance assessment to see if there is a reason one area of the home does not stay comfortable. We often find areas that can be sealed or insulated for an immediate improvement in comfort.

For more information about how to be comfortable in all areas of your home, contact P.K. Wadsworth Heating & Cooling. We’ve been helping Cleveland homeowners keep their homes comfortable for over 75 years.

pk wadsworth heating performance check savings


Paul WadsworthKim Nemecek works at P.K. Wadsworth Heating & Cooling. After growing up in Cleveland, she lived in Florida for many years, working at an air conditioning company there. Kim has four grown children, two grandchildren and two spoiled dogs. She lives in Solon with her husband, Todd.

The opinions and statements contained in this article are for general informational purposes only and are not instructions. Only trained, licensed and experienced personnel should attempt installation/repair. The author assumes no liability for the opinions/statements made in this article. Any individual attempting a repair or installation based on this article does so at their own risk of loss.


Topics: home performance assessment, Cleveland Home Comfort, zoning system, furnace

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