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Is the A421AEC-02 a direct swap for the older A419 series
and Coleman control circuits
and Payne furnace systems
800 in-lbs—a significant upgrade for heavy-duty drive systems
Flexible Installation: The 6' capillary allows for the control box to be mounted away from the sensing point for easier accessibility
Lochinvar & A.O. Smith 100171948 Gas Valve Kit 326058-758 Is the A421AEC-02 a directThe Lochinvar & A. O. Smith 100171948 Gas Valve Kit is a critical OEM component engineered specifically for the Knight WH199 wall mount boiler and compatible high efficiency water heaters. This assembly serves as the primary regulator for fuel delivery, ensuring precise negative pressure gas valve operation required for clean combustion and stable flame signals. Designed to interface directly with the Smart System control board, the kit includes the
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