Rheem-Ruud 47-21663-09 Limit Switch this limit switch is engineered

this limit switch is engineered to monitor outdoor ambient or coil temperatures

Constructed from high-durability materials to withstand the corrosive environment of high-temperature combustion exhaust

Can I use an aftermarket universal limit switch instead of this York OEM part

check your local codes

Rheem-Ruud 47-21663-09 Limit Switch this limit switch is engineeredThe Rheem Ruud 47 21663 09 Limit Switch is a critical safety component designed for precise thermal regulation within HVAC equipment. This SPST normally closed switch features a fixed open temperature of 150F and a fixed close temperature of 120F, ensuring reliable high limit protection for the heat exchanger. As a green color coded general purpose control, it operates with an automatic reset function, eliminating the need for manual intervention