Lennox 25J30 Limit Switch ensuring the venting system is

ensuring the venting system is clear before allowing the gas valve to open

Can this contactor be used for resistive heating loads

Common Questions: Will the 20197313 replace my metal-cased 20197306

38" WC (Water Column) pressure rating

verify the MFD rating on your motor's nameplate before installation

Lennox 25J30 Limit Switch ensuring the venting system isThe Lennox 25J30 is a heavy duty, disc style OEM furnace limit switch engineered for high precision thermal monitoring in residential and light commercial air handlers. This SPST normally closed control is a direct drop in replacement for the Lennox 25J3001 and is critical for maintaining safe plenum temperatures. Designed with an automatic reset function, the switch triggers a circuit break when temperatures reach the 155F cutout point, effectively