![Lennox 21J99 Control Board, DSI specifications — New England Supply House [NESH-SPECTABLE-V1]](http://newenglandsupplyhouse.com/cdn/shop/files/nesh-21j99-specs.png?v=1794089147&width=1445)
This Lennox 21J99 DSI control board is a genuine Lennox replacement ignition control board for compatible furnaces. It directs the ignition sequence, including the ignitor and gas valve, to light the burners safely. Confirm this part number against your equipment's parts list before ordering.
Specifications
| Part Number | 21J99 |
|---|---|
| Brand | Lennox |
| Type | Control Board |
| Ignition Type | DSI |