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It should be inspected or replaced if the actuator shows signs of hysteresis
Check the flame signal strength using a multimeter set to microamps (µA)
Operating on a 24V supply
When troubleshooting "no heat" calls
Lennox 74H01 Potential Relay 318518-761 It should be inspected orThe 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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