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When troubleshooting "no heat" calls
It should be inspected or replaced if the actuator shows signs of hysteresis
As a technician-grade differential air pressure switch
Operating on a 24V supply
Specifically engineered for use with J Series Electric Zone Valves
Lennox 74H01 Potential Relay 318518-761 When troubleshooting "no heat" callsThe Lennox 74H01 Potential Relay is a mission critical OEM replacement part designed for high torque motor starting applications in residential heating and commercial air conditioning systems. Engineered to manage compressor start up cycles, this potential type motor starting relay features a normally closed (SP N. C.) contact configuration that effectively removes the start capacitor from the circuit once the motor reaches sufficient back
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