21M51U-843 – CONTROL BOARD (2-STAGE, PSC)

Name: 21M51U-843 - CONTROL BOARD (2-STAGE, PSC)
Brand: Universal
SKU: 21M51U-843
Price: 337.70 USD
Availability: InStock

SKU 21M51U-843·Replaces 1006225, 100869-03, 10207708 +79

$337.70

In-store price · paid at counter

Low Stock at our Dallas counter

Tested before you leave. Free at the counter.

Visit our Dallas counter to purchase

10226 Plano Rd, Suite 104 · Dallas TX 75238

Call (214) 340-9421 Get directions

Open now · Closes 7pm·Mon–Fri 10am–7pm · Sat 10am–3pm

Free part testingBench-tested at the counter

27,000+ in stockToday, on the shelf

4.9 · 512 reviewson Google

Since 199828 years on Plano Rd

Free Part Testing

27,000+ In Stock

4.9 Stars · 512+ Reviews

Since 1998

🏪 In-Store Pickup Only — We do not offer shipping or online ordering. Visit our Dallas location to purchase.

In Stock

Visit our Dallas store to purchase

Call (214) 340-9421 Get Directions

In Stock — Pick Up at Our Dallas Store

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 21M51U-843 is a universal replacement for 2-stage gas furnaces using PSC (standard) blower motors. Replaces hundreds of OEM boards with built-in LED diagnostics.

Specs: 2-stage, PSC motor compatible, universal integrated furnace control, LED diagnostics, by White-Rodgers

Replaces: 1006225, 100869-03, 10207708, 10207712, 10207713, 1148167, 18381, 18384, 18M34, 20300001, 20300003, 21M51-495, 21M51U-843, 265903, 39M26, 43207001, 44957001, 449573, 46M99, 50A51-210, 50A51-211, 50A51-215, 50A51-225, 50A51-235, 50A51-242, 50A51-243, 50A51-405, 50A51-495, 50M51-242, 50M51-495, 50M61-120, 50M61-288, 50M61-289, 50M61-495, 50M61-843, 542767, 62798, 63W26, 83L93, 872670, CNT01308, CNT02184, CNT03077, CNT05122, CNT06424, CNT07566, CNT1308, CNT2184, CNT6424, D330934P01, D330937P01, D340021P01, D341418P01, D341418P02, D344301P01, KIT15943, KIT17858, PCB00114, PCB00115, PCB00116, PCBBF114, PCBBF115, PCBBF116, PCBBF120, PCBBF125, PCBBF149, PCBBF149S, R43207001, R44957-001, R44957001, S1-03101290000, S1-03101909000, S1-03102954000, S1-03103009000, S1-03109117000, S1-03109168000, S1-33102954000, S1-33103009000, S1-33109117000, S1-33109168000, TUD100R948J0, X13650839010, Y4151

Fits: Universal — most 2-stage PSC motor furnaces. Lennox: 18M34, 39M26, 46M99; and many other brands

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.