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requiring a replacement Lennox limit switch
This unit is a universal replacement for most dryers using HSI systems
If the metallic seats and springs show no signs of scale build-up
The 1172644 is primarily used in ICP
the 601129F is designed solely for Hot Surface Ignition (HSI) systems and cannot be used in intermittent pilot or direct spark applications
Lennox 73K20 Limit Switch 326058-755 requiring a replacement Lennox limitThe Lennox 73K20 Limit Switch is a critical safety component designed for furnace high limit protection and temperature regulation in residential HVAC systems. As an OEM Lennox replacement part, this switch features a 3 inch insertion depth and operates on a 130 160F automatic reset logic. It is engineered to monitor heat exchanger temperatures, maintaining a normally closed circuit that opens upon reaching the 160F high limit threshold to prevent
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