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replace thermostat batteries-hvac systemThermostats come under a number of different categories, but whether you've got a switch-controlled or digital unit, chances are you'll have to replace thermostat batteries at some point. It's actually recommended you do this once a year. If you're unsure how to replace thermostat batteries, keep reading.

Battery Basics

The most common types of batteries you'll find in thermostats are AA, AAA alkaline batteries, or 3V disc-style lithium batteries. These batteries help to retain thermostat programming and stop the HVAC system from simple powering in the event of a power outage. Changing thermostat batteries once a year or when the digital display indicator states battery levels are low will enable the thermostat to keep working efficiently.

How to Replace Thermostat Batteries

Before you begin, you'll need a small, flathead screwdriver and the replacement batteries.

  • Detach the wall thermostat housing from it's wall-mounted plate.
  • Turn the thermostat's housing over and look for the battery slots. If the batteries are in tight, you may have to use the screwdriver to carefully pry them out so you can replace them with the new batteries.
  • Now, paying attention to the markings on the slots, insert the new batteries. If there are no markings, the plus sign should be facing up.
  • Place the thermostat back on the wall by aligning the pins on the back with the terminal screw block. You should be able to snap it back into place.

Do not install batteries you think may be damaged or show signs of corrosion or leaking, and don't recharge used batteries unless they're specifically designed to be rechargeable. If you own a digital thermostat with a display, you should see an indicator warning a month or two before batteries die. This is a sign you should replace the batteries ASAP. For more advice about how to replace thermostat batteries, or for any other HVAC-related issues, contact the experts at Gilman Heating & Cooling today. We look forward to hearing from you. Image Provided by Shutterstock.com