Lennox 88K30 Tstat/Sensor the P100AP-4 pressure switch is

the P100AP-4 pressure switch is cross-compatible with the P100AP-4C

this RIB relay provides reliable switching for pilot duty loads

Featuring Encapsulated Electronics and 4kV surge protection

this 3-foot rigid tube facilitates the intake of air into the detection chamber to ensure rapid smoke identification

Common Questions How do I wire the RIBMN24C for a normally open application

Lennox 88K30 Tstat/Sensor the P100AP-4 pressure switch isThe Lennox 88K30 is a critical OEM defrost thermostat designed to regulate the defrost cycle in residential heat pump systems. Engineered to prevent evaporator coil icing, this sensor features a specific 70 42F temperature calibration. It is designed to close the circuit at 42F to initiate the defrost sequence and open at 70F once the coil is clear, ensuring the system returns to heating mode efficiently. This genuine 88K3001 replacement part is a