Lennox 42J07 Limit Switch When diagnosing furnace limit switch

When diagnosing furnace limit switch tripping issues in Goodman or Amana units

technicians should verify the solenoid valve coil 120V rating and lead length match the existing actuator to ensure optimal performance and code compliance during installation

Using it on larger shafts will lead to binding or mechanical failure

necessitating a partial drain of the isolated circuit

Engineered for high-performance mechanical environments

Lennox 42J07 Limit Switch When diagnosing furnace limit switchAs an HVAC technician, you know that a reliable Lennox 42J07 Limit Switch is non negotiable for system safety and performance. This genuine OEM replacement part is an auto reset limit switch engineered to monitor internal plenum temperatures in a variety of Lennox residential and commercial units. Specifically designed as an L220 40F limit switch, it features a fixed temperature setting that triggers the circuit at a high limit of 220F and resets once