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For technicians troubleshooting hydronic mixing control issues
making it suitable for both chilled water and low-pressure steam applications
it integrates a redundant solenoid valve with a high-capacity pressure regulator to maintain stable manifold pressure across varying inlet conditions
By providing real-time system feedback
Lennox 21W14 Control Board 328140-751 For technicians troubleshooting hydronic mixingThe Lennox 21W14 Control Board (OEM 101029 01) is an essential Direct Spark Ignition (DSI) Integrated Control Board designed for high performance gas furnaces. This replacement ignition control board operates on a 24VAC circuit at 50 60 Hz, managing critical combustion cycles including flame sensing, gas valve regulation, and combustion blower motor timing. Engineered for precise microprocessor control, the 21W14 eliminates the need for standing pilot
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