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.
LB-91097C – IGNITION CONTROL REPLACEMENT KIT (17W82)
$425.97
Lennox 17W82 (LB-91097C) ignition control replacement kit. Replaces multiple older Lennox furnace boards including 21L890 and 72K79. Complete kit with harness.
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm | In-Store Pickup Only
Description
If your furnace won’t ignite, shows error codes, or the blower won’t start, the control board controls all of it. The 17W82 is a Lennox ignition control replacement kit that comes with everything needed to swap out older Lennox furnace boards. Includes wiring harness and hardware for a complete installation.
Specs: Complete replacement kit with harness, OEM Lennox
Replaces: 17W82, 21L890, 37K56, 72K79
Fits: Lennox furnaces requiring LB-91097C ignition control kit
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.
