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Dual Frequency: Designed to operate efficiently at both 50Hz and 60Hz frequencies
The York S1-025-29083-002 is an automatic reset switch
Always verify your regulator model number before installation
Enhanced System Safety: Proper sequencing prevents heat exchanger overheating by ensuring the fan remains active during the cool-down cycle
Always verify the valve series on the nameplate before installation
Lennox 87H90 Limit Switch Dual Frequency: Designed to operateThe Lennox 87H90 Limit Switch is a critical OEM furnace replacement part engineered for precise thermal regulation within high performance heating systems. This primary limit control features a 1. 75 inch insertion length and operates on an automatic reset logic, making it essential for maintaining safe internal plenum temperatures. As a veteran technician knows, this SPST (Single Pole Single Throw) safety device is designed to open on rise at 190F
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