The White-Rodgers 3L09-19 Limit Switch is a mission-critical safety component designed for precise high-limit protection in forced-air heating systems

and PGB series

Will this replace the HH12ZA260

please refer to the AM-731 linkage kit

and P331-2217

Trane FUS0762 Fuse Link The White-Rodgers 3L09-19 Limit SwitchThe Trane FUS0762 is a high limit thermal fuse link designed for critical thermal protection within Trane and American Standard residential and commercial HVAC units. Rated at 98C (240F), this OEM replacement part acts as a fail safe safety mechanism, effectively interrupting the electrical circuit when internal temperatures exceed safe operating parameters. Failure to replace a tripped or oxidized fuse link can lead to system wide failures or safety