York S1-024-36027-000 Limit Switch 321894-706 For contractors troubleshooting frequent furnace

For contractors troubleshooting frequent furnace cycling or "limit open" fault codes

cataloged as part number 93M0401 and often identified by model 100499-01

While the internal ball bearing can handle standard operational heat

the H19AA-4 is a direct drop-in replacement for the BASO H19AA-4C

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York S1-024-36027-000 Limit Switch 321894-706 For contractors troubleshooting frequent furnaceThe York S1 024 36027 000 Limit Switch is a critical high temperature safety control designed for precise thermal management within HVAC furnaces and electric heaters. This genuine OEM replacement part is engineered to open the electrical circuit when the internal plenum temperature reaches its 160 degree Fahrenheit cutout point, effectively preventing heat exchanger damage or unsafe operating conditions. Once the system cools to the 50 degree