White-Rodgers™ 21V51U-843 Universal Hot Surface Ignition ControlWhite-Rodgers™ 21V51U-843 Universal Hot Surface Ignition Control
White-Rodgers™ 21V51U-843 Universal Hot Surface Ignition Control
White-RodgersSKU: 760298

White-Rodgers™ 21V51U-843 Universal Hot Surface Ignition Control

$284.38
Low Stock (3)

White-Rodgers™ Hot Surface Ignition Control, Universal, Accessory Type: Hot Surface Ignition Control, 15-1/2 in Lead Length, 15-1/2 in Probe Length, 25 VAC, 530 mA, 1/4 in Spade Terminal and Molex Plug Electrical Connections, Liquid Propane/Natural Gas , 17 s Igniter Warm-Up, 5-1/4 in Width, 1-1/4 in Depth, 8 in Height, Import

Shipping policy

Orders placed by 2:00pm EST will ship same day, except on holidays.

More Details

Product overview
  • 16-pin variable speed circulator output for ECM
  • Dipswitch selectable for OEM applications two-speed inducer output, two stage gas valve output
  • Pushbutton fault history retrieval
  • Furnace status LED - tri-color (green, red and amber)
  • Heat fan off delay (dipswitch selectable), fan on delay for cooling
  • -40 to 175 deg F
  • 2-stage gas valve output
  • 3 A fuse protection
  • Pressure switch inputs and monitoring
  • Flash microprocessor with non-volatile memory
  • Flame current measurement points
  • 1.5 A valve relay
  • 2.2 FLA to 3.5 LRA inducer relay
  • 14.5 FLA to 25 LRA circulator relay
  • 1 a max at 120 VAC humidity
  • 1 a max at 120 VAC electronic air cleaning
  • 4 a max at 132 VAC ignitor relay
  • 0.3 uA DC max current for flame detection
  • 0.1 uA DC min current for flame detection
  • 100 M ohm leakage resistance, 3 speed PSC blower motor systems
Specifications
Manufacturer Part Number 21V51U-843
UPC 786710540714
Overall Dimensions 4-3/8 in W x 1-1/4 in D x 5-9/16 in H
Material n/a
Domestic or Import Import
End Style n/a
Type Universal
ADA Compliance n/a
Warning Professional installation required
Standards and Approvals CSA Certified
Resources
Delivery & Returns

Orders will ship same day if received by 2pm EST.

Upcoming holiday closures: May 25, 2026

All returns are inspected on receipt; credit is issued after condition is confirmed. Credit is issued only for items returned in original, saleable condition after inspection.

FINAL SALE ITEMS ARE NOT ELIGIBLE FOR RETURNS OR EXCHANGES.

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