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a 13A15 vent protector should be used to prevent blockage from the elements
The set point is adjusted using the visible dial on the face of the control
requiring a replacement Carrier HH12ZB250
The Lennox 27H87 Limit Switch is a critical OEM safety component engineered for precise thermal management in high-performance heating systems
Using a switch with an incorrect rating can cause the unit to run under unsafe conditions or fail to ignite entirely
Lennox 18M84 Limit Switch Els PW 17895 a 13A15 vent protector shouldProfessional grade Lennox 18M84 limit switches are critical safety components designed to regulate internal furnace temperatures and protect heat exchangers from thermal stress. This OEM Lennox limit control features a 3 inch insertion depth and is factory calibrated for an auto reset range of 230 260F. As a normally closed switch, it breaks the electrical circuit to the gas valve if the plenum temperature exceeds the 260F threshold, typically caused
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