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While it fits a wide range of York chiller systems
or a failing blower motor rather than a defect in the switch itself
this specific sensing element is designed for 3/8" valve configurations
This sensor is specifically built for heavy-duty applications
The extended shank design is specifically optimized for modern water heaters with up to 2 inches of thick insulation
Laars Heating Systems 20430400 Rollout Switch R-134A While it fits a wideMaximize the safety and operational integrity of your heating equipment with the Laars Heating Systems 20430400 Rollout Switch. Designed specifically as a critical safety limit for Laars Mighty Stack models TL80 and TL00, this OEM component is engineered to detect abnormal burner compartment temperatures and break the safety circuit before hazardous conditions escalate. As an HVAC rollout switch featuring a manual reset, it provides a positive lockout