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the 138-18-021-01 is a direct OEM replacement part that fits perfectly within the pilot assembly
For accurate thermal sensing
making it suitable for both 208/230V and 120V circuits
this kit addresses stem leaks and pressure loss without requiring a full valve body replacement
Armstrong Furnace R101432-15 Pressure Switch the 138-18-021-01 is a directThe Armstrong Furnace R101432 15 Pressure Switch is a critical safety component calibrated to a . 85" WC fixed set point. Designed for induced draft furnaces, this SPST (Single Pole Single Throw) switch monitors the pressure differential within the combustion chamber to ensure the inducer motor is moving sufficient air for safe ignition. Featuring dual 1 4" barb connections, this pressure switch provides a secure fit for standard pneumatic tubing,
