Help! My thermostat only works sometimes? — Heating Help: The Wall
Do You Have a Mercury Thermostat? Here's What to Know
I have an old Honeywell (Mercury) heat-only thermostat. Any recommendations how to wire this? I was expecting to see a red and white wire. Thanks! : r/Nest
What You Need to Know About Smart Thermostats and C-Wire - Gearbrain
Honeywell Round Mercury Free Thermostat T87N1000 - The Home Depot