the internal disc is likely damaged and requires replacement

and 480V inputs allow for maximum job site versatility

Simplified Identification: Features a black color-coded top and a bendable ID tag for the capillary tube to prevent sizing errors in the field

exhaust fans

High Capacity: Rated for a 22A resistive load at 277 VAC

Resideo TH8110R1008 Thermostat 318973-401 the internal disc is likelyThe Resideo TH8110R1008 is a professional grade VisionPRO 8000 with RedLink touchscreen thermostat designed for 1H 1C conventional systems and single stage heat pumps. Operating on a versatile 18 30Vac or 750mV platform, this unit features 7 day programmable logic with a patented interview based setup that eliminates the need for complex manuals during commissioning. It functions as a standalone thermostat or integrates into a broader RedLink wireless