Focus on maintaining peak system efficiency and reliable cold-weather performance by utilizing this industry-standard combustion relay

Smith systems to ensure seamless integration with the existing control board

Using this genuine Copeland spare part prevents common field issues such as coil burnout or humming

Using genuine York replacement parts ensures that your weatherproofing seals meet the original equipment tolerances required for high-efficiency system operation

the capillary tube is a sealed system containing a thermal sensing fluid

Lochinvar & A.O. Smith 100110011 Switch 322027-701 Focus on maintaining peak systemWhen you're servicing high recovery Lochinvar boilers or A. O. Smith water heaters, the 100110011 Thermal Switch Assembly is a critical safety component you can't overlook. This OEM thermal limit switch is engineered to monitor combustion chamber temperatures and interrupt the burner circuit if a rollout or overheating condition occurs. Designed for precise HVAC temperature control, this genuine factory part serves as a direct replacement for