York 025-41101-000 Crankcase Heater or blocked return air grilles

or blocked return air grilles that cause heat to build up beyond the 155°F threshold

making it an essential high limit switch for safeguarding HVAC equipment against overheating while ensuring automated system resets once safe operating temperatures are achieved

Disconnect power to the furnace and use a multimeter to check for continuity across the two terminals

this restrictor plate ensures the air-fuel ratio remains consistent with manufacturer specifications

60 inches of water column set point

York 025-41101-000 Crankcase Heater or blocked return air grillesThe York 025 41101 000 Crankcase Heater is a critical belt type heater engineered to prevent refrigerant migration and maintain optimal oil viscosity in commercial compressors. Operating at 480 Volts with a 70 Watts power rating, this heater ensures that liquid refrigerant does not accumulate in the crankcase during the off cycle, mitigating the risk of liquid slugging and terminal bearing failure upon startup. Designed for precision fitment, this