Always verify the physical cabinet size and minimum fan speed requirements before installation

The L140-40F specification indicates the switch opens at 140 degrees Fahrenheit and automatically resets when the temperature drops by 40 degrees

the reverse is generally not permitted by code

What are the electrical requirements for the 14270049

this part will not be a compatible substitute due to the difference in resetting logic and safety function

Supco 90290 Relay 326058-755 Always verify the physical cabinetThe Supco 90290 Relay is a heavy duty, general purpose 24V N O SPST relay engineered for reliable switching in HVACR and industrial control circuits. Built for high cycling applications, this SPST fan relay features a 24 VAC coil and single pole, normally open contacts, making it a professional grade solution for managing HVAC blower motor operation and automated equipment sequences. With a contact rating of 8 FLA 18 LRA and a 50 60 Hz frequency