Before replacing the board, count the LED blinks — the error code tells you what actually failed. Sometimes it’s a $15 fuse, not a $140 board.
607436-05 – CONTROL BOARD (23C48)
$403.50
Lennox 23C48 (607436-05) ignition control board. OEM replacement for Lennox, Ducane, and Armstrong furnaces. Replaces earlier 607436-03 and 607436-06 revisions.
10226 Plano Rd, Suite 104, Dallas TX 75238
Questions? Call or text (214) 340-9421
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
Description
If your furnace won’t ignite, shows error codes, or the blower won’t start, the control board controls all of it. The 23C48 (part number 607436-05) is a Lennox OEM ignition control board for Lennox, Ducane, and Armstrong furnaces. Replaces earlier board revisions and related Lennox part numbers.
Specs: OEM Lennox ignition control board, LED diagnostics
Replaces: 607436-03, 607436-05, 607436-06, 103217-02, 103217-03, 16C81, 27P19, 85W79
Fits: Lennox, Ducane, and Armstrong gas furnaces using 607436-series control boards
Need help? See our Furnace Not Heating Guide.
In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.
