Rugged Construction: Designed with a 3-inch probe insert specifically for heavy-duty residential and commercial air handlers

though it remains a primary choice for maintaining legacy R-22 systems

How do I verify compatibility with my specific York air handler

This is a non-regulated model

Common Questions: What do the flashing LED codes mean on the 74W03

Heil Quaker ICP 1186810 Limit Switch 318973-401 Rugged Construction: Designed with aThe Heil Quaker ICP 1186810 Limit Switch is a critical safety component designed for precise thermal monitoring in high efficiency gas furnaces and air handlers. Engineered with a 165 degree Fahrenheit open temperature and a 125 degree Fahrenheit close temperature, this L165 40 manual reset switch prevents heat exchanger overheating by breaking the electrical circuit to the gas valve when temperatures exceed safe operating limits. This OEM replacement