FIG. 1Photo not availableControl board
PART NUMBER / MADE BY WHITE RODGERS
21M51U-843Universal Two-Stage HSI Integrated 3-Speed (PSC) Furnace Control Kit (White Rodgers 21M51U-843)
Replaces 2 other part numbers.
This part is out of stock right now, so it cannot be added to the cart.
- Free standard shipping over $49
- 30-day returns on unused parts
- PO and tax-exempt orders: request a quote
Replaces these part numbers
If your old part shows one of these numbers, this part is listed as its replacement.
- 50M61-843
- R43207-001
Match these numbers
- 01Part number: listed as a replacement for yours
- 02Ignition type: same as your furnace
- 03Wiring: photo every wire first
Turn off power at the breaker and the disconnect before you start. Not sure? Call a licensed HVAC tech.
Specifications
| Part type | Control board |
|---|---|
| Part number | 21M51U-843 |
| Made by | White Rodgers |
| Ignition type | Intermittent Hot Surface Pilot |
| Stages | 2 |
| Operating temp | -40° to 175°F |
| Humidity range | 5% to 93% Relative Humidity (Non-Condensing) |
| Width | 5-1/4" |
| Height | 8" |
| Depth | 1-1/4" |
| Type | Control board |