Lennox 97L01 Limit Switch R-407A check the output at the

check the output at the gas valve connectors while the pilot is lit

Use a calibrated pressure gauge at the test port to verify the 13 to 25 Psig supply and adjust the dials to match the building’s thermal load requirements while maintaining the minimum 5 Psig deadband

do not bypass it

Industrial-Grade Construction: Features a stainless steel stem for enhanced corrosion resistance and long-term durability in high-cycle heating applications

the VT3317 is the 3-way valve body only

Lennox 97L01 Limit Switch R-407A check the output at theThe Lennox 97L01 Limit Switch is a critical OEM replacement part engineered for precise thermal regulation in Lennox gas furnaces and air handlers. This L200 30F limit switch is designed to open the electrical circuit if the heat exchanger temperature exceeds its 200F setpoint, preventing mechanical failure and ensuring safe combustion cycles. With a 30F differential for automatic reset, it provides consistent high limit protection and prevents