
607436-05 – CONTROL BOARD (23C48)
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
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.
Cross-reference numbers
This part replaces the following OEM and aftermarket numbers:
- 103217-02
- 103217-03
- 10321703
- 16C81
- 27P19
- 607436-03
- 607436-05
- 607436-06
- 85W79
Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.




