Thermostat Troubleshooting – Battery Replacement

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Thermostat Troubleshooting – Battery Replacement

When the Replace Battery warning beings to flash, it typically means you have a couple of months before the batteries will deplete.

Honeywell 4000 series (Th4110D/ TH4210D)

“REPLACE BATT” flashes

  • To remove and replace the batteries, pull at the bottom of the thermostat to remove it from the wallplate.
  • Once removed, turn the thermostat over and insert 2 fresh AA batteries, and then reinstall the thermostat on the wallplate.

Honeywell 6000 series (TH6110D/ TH6220D/ TH6320U)

“REPLACE BATTERY” flashes

  • Press and pull to remove the battery holder at the top right of the thermostat.
  • Insert 2 fresh AA batteries and then reinstall battery holder.
  • It is suggested to replace the batteries once a year. If batteries are inserted within two minutes, the day and time will not have to be reset.

Honeywell 8000 series (TH8110U/ TH8320U/ TH8321U)

“LO BATT” flashes

  • Grasp thermostat and pull to remove the thermostat from the wallplate.
  • Insert 3 fresh AAA batteries and reinstall the thermostat on the wallplate. It is suggested to replace the batteries once a year.

Please contact us today regarding troubleshooting your thermostat.