Bard HVAC 8402-124BX Limit Switch 321894-706 When should I replace this

When should I replace this capacitor

Common Technical Questions What is the correct capacitor rating for the Lennox 25W16

Can this unit be used for liquid pressure sensing

Replacing a depleted 100108660 magnesium anode is a critical maintenance step to prevent hydrogen gas buildup and localized pitting on the tank interior

Does this item include the mounting gaskets

Bard HVAC 8402-124BX Limit Switch 321894-706 When should I replace thisThe Bard HVAC 8402 124BX Limit Switch is a critical safety component designed for high temperature monitoring in Bard wall mount units and gas electric furnaces. Engineered with an L270 30 specification, this fixed temperature limit control is calibrated to open the electrical circuit at 270F, protecting the heat exchanger from structural damage and preventing unsafe operating conditions. The 30F differential ensures the switch resets automatically