How to Recalibrate Honeywell Thermostat

Posted by: Mas Broto
Last Udated:
How To Recalibrate Honeywell Thermostat

Honeywell thermostats are calibrated at the factory to provide the optimum temperature settings. However, there may be occasions when you need to recalibrate it. Below we’ll show you how to recalibrate your Honeywell thermostat.

Most of the time, your Honeywell thermostat hangs quietly on the wall and does its job of keeping your home comfortable. The only thing you can do with it is changing the setting a few degrees up or down. But sometimes, changing the setting doesn’t help. If you can’t get comfortable, no matter how much you change the thermostat, you may need to recalibrate it.

Several problems can be fixed by recalibrating your thermostat, such as:

  • Problems with setting up your thermostat
  • Can’t connect with the furnace or air conditioner
  • Temperature readings that are inconsistent or wrong

How to Recalibrate Honeywell Thermostat – Step-by-Step Instructions

You’ll need a tool called a recalibration wrench. These are made to fit over the hex nuts inside the Honeywell thermostat so you can make minute adjustments.

  1. Gently push on the temperature setting indicator until it shows the same reading as the thermometer on the thermostat.
  2. Remove the thermostat cover.
  3. Slip the calibration wrench under the heating coil and around the hex nut beneath the coil. The heating coil is the spiral-shaped strip of metal set to one side of the thermostat.
  4. Place a finger on the setting switch to prevent it from moving during adjustments. Turn the wrench clockwise slowly until the heating switch inside nudges away from the thermometer.
  5. Replace the cover. Move the setting indicator to a low-temperature setting. Wait 10 minutes for the cooling system to come on and stabilize the temperature.
  6. Remove the thermostat cover. Insert the calibration wrench underneath the heating coil. Steady the setting lever with your finger.
  7. Turn the wrench slowly to the right until the mercury inside the tube inches just to the left side of the indicator bar on the tube. Replace the thermostat cover.

Some of the Honeywell thermostats are directly wired to the electricity in the house. If you do something wrong, you could get an electric shock, which could hurt you or even kill you. But most of the tasks can be done safely by using the controls that come with the device.

If you don’t know how to work with home wiring or can’t figure out what model you have, call an HVAC pro before doing any work that could put you in contact with the wiring.

Some of the most trusted and reliable thermostats on the market are made by Honeywell. However, even the best technology sometimes needs to be calibrated or reset. If the temperature in your home seems off by a few degrees, if your energy bill goes up for no reason, or if your thermostat doesn’t turn on your heating or cooling system, you may need to recalibrate your Honeywell thermostat.

mas broto avatar

Mas Broto

Have been in the heating and air conditioning (HVAC) industry for over 20 years. He is person that will grow and thrive to learn more about the HVAC industry throughout his career. Mas Broto is also a blogger, who's dedicated to bringing you the best knowledge to get ahead in the game of life.

Related Posts