Lennox 45H83 Limit Switch preventing ice buildup on the

preventing ice buildup on the coil

Common Questions for Technicians What is the difference between the black and red faucet handles

it is a fixed brass component

or the burner shutting down shortly after startup due to a lost vacuum signal

Can I bypass the 1004303 rollout switch for testing

Lennox 45H83 Limit Switch preventing ice buildup on theThe Lennox 45H83 Limit Switch is a critical OEM replacement part engineered for high temperature thermal protection within residential and commercial HVAC systems. As an automatic reset limit switch, this component is factory calibrated to trip between 200F and 230F, effectively interrupting the electrical circuit to the burner or heating elements if internal temperatures exceed safe operating parameters. Designed for 24V or 240V control circuits,