Clip Transcript For:
Thermostat Installation
computer-generated transcript - may not be 100% accurate
" Hi, I'm Bob Vila from Home Again. Have you ever wondered how the thermostats in your house work? Inside your thermostat is a small glass vial filled with mercury. This is attached to a metal coil that expands when the heat rises and contracts when it gets cooler. The mercury moves back and forth as a result of the change in the temperature causing your boiler to turn on or off. To ensure this works properly, always level the mounting plate when installing. I'm Bob Vila. Good luck with your home improvement project. "