What is the difference between this PTC device and a standard start relay

the S1-029-21182-042 threads securely into the gas manifold

maintaining the integrity of the original equipment's safety circuit

Designed for high-cycle survival

this switch is the standard solution for resolving lockout codes related to over-temperature faults

Amana-Goodman 20269903 Limit Switch What is the difference betweenThe Amana Goodman 20269903 Limit Switch is a critical safety component designed for high limit temperature monitoring in residential gas furnaces and air handlers. Engineered with a 150F Cut Out (CO) setpoint and automatic reset functionality, this SPST (Single Pole Single Throw) switch ensures the heat exchanger operates within safe thermal parameters. Labeled as a L150 40F limit controller, it opens the electrical circuit to the gas valve if