How to tell if your system is compatible

• To check your system’s compatibility before purchasing a Nest thermostat, use our online Compatibility Checker. • To get a custom wiring diagram for installation, simply follow Nest app’s thermostat installation instructions. • Nest thermostats are designed to work with most 24V systems, even older systems. They work with all common fuel types including natural gas, oil, and electricity. • It’s important to check that your system is compatible. Your system may work with both the Nest Thermostat E and the Nest Learning Thermostat, or only one of them. Tips for using the compatibility checker

The online Compatibility Checker has full instructions, but here are some additional tips.

How to turn your system's power off

This protects you and avoids blowing a fuse in your equipment.

There may be a switch on your system or near your system that looks like a regular light switch. If your system doesn’t have a switch, turn off power to it at the breaker or fuse box.

How to test that system power is off

Change the temperature on your thermostat by at least 5 degrees.

• If it’s winter, turn up the temperature to turn on heating. • If it’s summer and you have system cooling, turn down the temperature. • Wait at least 5 minutes to see if your system turns on (you’ll need to wait because many systems have a built-in delay).

Tip: You can listen for your system to turn on, or put your hand near a vent to feel if there’s warm or cool air coming through.

How to remove your thermostat’s cover

Some covers simply pull off, while others need to be unscrewed.

If you have an older thermostat there may be a mid-plate that also needs to be removed to expose the wires.