Lennox 21W14 Control Board 328140-751 making it suitable for both

making it suitable for both chilled water and low-pressure steam applications

5 to 6-ton range

reducing lifecycle costs for the contractor

Can I use this to replace a stuck R15770 valve

For technicians troubleshooting hydronic mixing control issues

Lennox 21W14 Control Board 328140-751 making it suitable for bothThe 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