or obvious physical signs like bulging or leaking oil from the capacitor casing

Critical Safety Integration: Monitors inducer blower vacuum to verify the integrity of the heat exchanger and venting system

the 20-001-02 is specifically spec'd for 5/8" OD glass

the switch breaks the circuit to prevent equipment damage and ensure safe operation

ensuring reliable open on rise switch action

Carrier HH18HA280 Defrost Stat or obvious physical signs likeThe Carrier HH18HA280 is a specialized L80 50F defrost thermostat designed to regulate the defrost cycle in residential and light commercial heat pump systems. This OEM Carrier part features a fixed set point, closing on temperature drop at 50F and opening at 80F to ensure efficient coil clearing while preventing excessive heat buildup. As a critical defrost sensor replacement, it prevents ice accumulation on the outdoor coil, maintaining optimal