How To Make Sure Your Thermostat is Working Properly

Posted by on 9/23/2018


The thermostat is the very heartbeat and control center of any HVAC system. It is very important to make sure your thermostat is working properly. The thermostat will control the HVAC unit and cut it on and off per a preselected temperature. There are several types of thermostats that are available to insure that your unit is being controlled accurately. Today’s digital offerings are much more accurate than the old mercury switch thermostats. Also with the development of smart thermostats these thermostats are more developed and accurate than ever before. Regardless of the type of thermostat you have there are a couple of factors that can influence the proper and accurate operation and performance of your thermostat. We will look at some of the most important factors.


Thermostat Calibration.


When calibrating wall thermostats, you will need to remember some of the more modern thermostats and smart thermostats do not have any calibration. This is because of the electronic digital technology that these thermostats use. This digital technology provides some very accurate temperature readings. Older thermostats such as the round Honeywell thermostats and other models rely on a mercury bulb sensor that will cut the HVAC unit on and off. This thermostat could be tilted slightly in one direction to help to calibrate the mercury switch. If you have one of these older thermostats it would be a great idea to switch to a digital model. You can easily change these over yourself.


Thermostat Locations.


Most of the thermostats are located about chest high on an interior wall of your home. They are usually located in a part of the home where it is not effected by drafts or other unusual temperature conditions such as direct sunlight. There are however some good place and bad place to place a thermostat.


Good thermostat locations include:


  • In the living room or dining room.
  • About five feet from the floor on an interior wall.                           
  • In a position where the thermostat will be in a natural air flow.                 
  • In a central location of the home.


Bad Thermostat Locations:


  • On an exterior wall of a building.
  • Where drafts from an exterior door will affect the reading.
  • Above or in the line of airflow from a heating or cooling air supply register.
  • In direct sunlight.
  • On a wall shared with a hot space such as
  • In a kitchen bath or entry hallway.
  • Behind an open door or behind furniture.
  • Next to air ducts or concealed pipes.
  • Do not place next to lamps or lights that


We know that for our HVAC units to operate properly and efficiently we will need an accurate thermostat. A faulty thermostat or a poorly placed thermostat will not allow for the HVAC unit to operate at peak performance. This will raise the energy cost over time. By following these simple suggestions to insure the thermostat is working properly will help you to cut energy cost and save you money.

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