Replacing the Batteries in a Thermostat Is a Quick and Easy DIY Task – Sobieski Services | DE, NJ, PA, MD

Replacing the Batteries in a Thermostat Is a Quick and Easy DIY Task

If the digital display of your thermostat has gone blank, or it’s telling you to replace the batteries, use this guide to make easy work of a simple task.

Batteries Not Included

Many thermostats still use batteries, while others draw power from your home’s electrical or HVAC system. The typical battery-powered dial, switch, digital or programmable thermostat is going to take regular AA or AAA alkaline batteries, a button-style 3V lithium battery or a 9-volt battery. If you don’t know which kind of batteries your thermostat requires, you’ll soon find out.

It’s a good idea to change the thermostat battery each year on a scheduled date. The first day of fall season is a good choice. You might also want to change the batteries of your carbon monoxide (CO) detectors too. Before starting, gather a few simple tools, such as a short one-foot level and a screwdriver set.

  • First, turn off the thermostat.
  • Gently slide the thermostat housing up and off the wall mount plate. If it doesn’t slide up/off or up/back-tilt, you can probably just pull it off.
  • Look at the back of the thermostat to see what kind of battery is required. You may need a screwdriver to carefully pry the battery out or to remove the cover.
  • Note the direction of the plus and negative signs for AA and AAA batteries, and insert the new batteries in the appropriate slot.
  • Gently wiggle the mount plate to see if it’s still firmly mounted to the wall. If it’s loose, tighten it as needed with a screwdriver.
  • If you have an old thermostat that uses mercury, handle it very carefully. Mercury is a dangerous neurotoxin and should be handled or disposed of safely. In fact, you might consider upgrading to an energy-saving programmable thermostat.

At Sobieski Services, Inc., our goal is to help our customers in Delaware, Pennsylvania, Maryland and New Jersey learn more about energy and home comfort issues – especially HVAC and plumbing issues – so that they can save money and live in healthier, more comfortable homes.

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