What is the difference between the 150 and 150S-HD

the 18C-500 series includes a non-metallic coating on the sensing element to isolate it from the water

it is primarily specified for high-volume output thermostats like the T-4002

Built with a rugged NEMA 3R enclosure to protect against rain and ice formation

York S1-028-17091-000 Drain Pan 326058-757 What is the difference betweenThe York S1 028 17091 000 is a precision engineered OEM replacement part designed specifically for York, Luxaire, and Coleman evaporator assemblies. This N coil condensate pan is manufactured to fit 17. 5 inch cabinet widths, providing a direct fit solution for technicians servicing residential split systems. Built to handle 2 row N coil configurations, the pan uses high temperature composite material to resist cracking and warping over time, ensuring