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Common Questions: Can I use this for intermittent starting applications
In the Lochinvar and A
How do I know if the nozzle temp switch is failing
What are the symptoms of a failing S1-024-24778-700
but the primary venting cause should also be addressed
Lennox 20J83 Limit Switch Common Questions: Can I useThe Lennox 20J83 Limit Switch (Model 20J8301) is an essential HVAC OEM replacement part engineered for precise thermal management in high efficiency furnaces. This single pole, single throw (SPST) automatic control is factory calibrated to actuate at 165F, effectively breaking the circuit to prevent heat exchanger damage or unsafe operating conditions. Once the plenum temperature cools to 135F, the switch automatically resets, restoring normal system