Lennox 25J30 Limit Switch This 40VA Class 2 transformer

This 40VA Class 2 transformer features inherently limited overcurrent protection

the component must be replaced once it has been activated by excessive heat

effectively preventing overheating and potential burnout

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

38" WC (Water Column) pressure rating

Lennox 25J30 Limit Switch This 40VA Class 2 transformerThe 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