How do I find my 1F78, 1F72, 1F73, 1F79 thermostat type number?
Remove the front cover from the wall plate.
TYPE or MODEL Number is located on the inside of front cover.
Links to information for 70 Series Digital Thermostats:
Replacement Homeowner's Manual/Installation Instructions
Frequently Asked Questions (FAQ's) - 70 Series thermostat operation