Lennox 203543, 42J0501 Limit Switch, Auto and similar items

Lennox 203543 / 42J0501 Limit Switch is a dependable OEM replacement safety control designed for compatible HVAC equipment. This auto reset limit switch is rated L170-40F and helps protect the system from excessive temperature conditions by interrupting operation when needed and automatically resetting when temperatures return to the proper range. It is an ideal replacement for a worn, damaged, or malfunctioning switch and helps maintain safe, reliable equipment performance. Key Features Genuine Lennox replacement part Part Numbers: 203543 and 42J0501 Product Type: Limit Switch Auto reset design Rated at L170-40F Helps protect HVAC equipment from overheating Supports safe and reliable system operation Ideal replacement for a faulty or worn safety switch Specifications Brand: Lennox Part Number: 203543 Alternate Part Number: 42J0501 Product Type: Limit Switch Reset Type: Auto Reset Temperature Rating: L170-40F Application: HVAC safety control Compatible Models: Fits 12 models Compatible Models GCS16-030-75 GCS16-030-75-02 GCS16-036-90 GCS16-036-90-03 GCS16-150-270 GCS16-150-270-01 GCS16R-036-90-03 GCS20-036-90-02 Why Choose This Item Choose this Lennox limit switch for a reliable replacement that helps restore proper temperature safety protection and dependable HVAC performance. With its auto reset function and L170-40F rating, this switch is built to support safe operation and consistent system function. Its compatibility with 12 models makes it a practical solution for repair, maintenance, and replacement needs