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Ask Our Technician: Furnace Turns On Frequently

IMG 7343 150x150 Ask Our Technician: Furnace Turns On Frequently

Glen J., AAA Heating & Air Conditioning Senior Technician

Q:  We recently moved into a newly built house and noticed that our furnace turns on and off frequently.  It will quickly get the house to the temperature we want it and shut off, but then turn back on again shortly afterward to start heating again.  Is this something we should be concerned about?  — Samuel Z., Maple Valley

A. It is possible that the furnace the builder put in the house is improperly sized.  Quite surprisingly, many homes, both new and old, have furnaces that are too large or too small for the space.  If the furnace is too small, it will run constantly because it is trying to keep up with the demands for heat that are put on it.  However, if a furnace is too large, it heats the home quickly and then shuts off quickly.  Because it is an inconsistent heat, the temperature falls soon, and the furnace is forced to come back on briefly to put out more heat.  It sounds like that could possibly be the problem at your home.  I would recommend scheduling a service technician to perform a full diagnostic on your furnace to determine if that truly is the cause or if there is more to the issue.  I would be happy to come out and take a look at it for you.  Just call our Kent Heating and Air Conditioning office at 253-630-9224 and they can set up an appointment for you.

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One Response to “Ask Our Technician: Furnace Turns On Frequently”

  1. Scott W January 8, 2012 9:10 am
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    My furnace dose not run consistently , the tempreture falls futher than it should and may or may not turn on. I have to turn the heat switch off than on to make the furnace kick on. The brand of furnace i have is a Janitrol. I bought a new Digital thermastat thinking the problem was the thermastat but its not. Any ideas of the problem ? Thankyou……..Scott W

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