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When replacing an expired coil
it maintains strict timing and contact resistance specifications essential for modern high-efficiency combustion systems
For contractors performing a failed blower motor replacement
Proper installation of this OEM Lennox furnace part is essential for maintaining strict safety standards and preventing heat exchanger damage
Trane SWT4230 Limit Switch 318172-701 When replacing an expired coilThe Trane SWT4230 Limit Switch is a genuine OEM replacement part engineered for high temperature circuit protection in residential and commercial heating systems. Classified as an L215F limit switch, this SPST (Single Pole Single Throw) thermal cut off is designed to open an electrical circuit when the sensor detects a temperature rise reaching 215F. This precise interruption prevents heat exchanger damage and ensures safe operation within the supply
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