i BOUGHT a used CARRIER INFINITY THERMOSTAT. INSTALLATION seemed EASY, but the SCREEN won’t LIGHT UP, though it BEEPS.

Energizer Smart Thermostat, Programable Wi-Fi Thermostat, 5GHz & 2.4GHz, Compatible with Alexa and Google, App Control, 3.5” inch Color Touch Screen, Easy Installation, 7 Day Scheduling, Night Light

Dreo Wall Heater for Bathroom, Smart Space Heaters with ALCI Plug, 1500W, 120° Vertical Oscillation, Adjustable Thermostat, 24H Timer, Easy Installation Electric Heater for Indoor use, Bedroom, Office

10A 16A Temperature Controller Switch Electric Oven Thermostat Oven Repair Parts 180 Degree Rotation - Walmart.ca

SPRING Home Improvement Plumbing Fixtures Thermostatic Spool Valves Repair Kit Thermostat Cartridge Brass Replacement H5 - Walmart.ca

Home Improvement Plumbing Fixtures Thermostatic Spool Valves Repair Kit Thermostat Cartridge Brass Replacement - Walmart.ca