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WHITE-RODGERS 21D83M-843 OEM Replacement Integrated Furnace Control Board - OEM Replacement Integrated Furnace Controls
WHITE-RODGERSOEM Replacement Integrated Furnace Controls

WHITE-RODGERS 21D83M-843 OEM Replacement Integrated Furnace Control Board

The WHITE-RODGERS 21D83M-843 is an OEM replacement integrated furnace control board designed to control humidifiers. It operates at 25V AC and is a direct replacement for Lennox systems, with manufacturer part number…

SKU 3G-OTH-70166

Also listed as: 21D83M843 · 21D83M 843

Brand
WHITE-RODGERS
Item
21D83M-843 OEM Replacement Integrated Furnace Control Board
Part Number
21D83M-843
Category
OEM Replacement Integrated Furnace Controls
Available to Order
Also known as:21D83M-843WHITE-RODGERS
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
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Technical Specifications

WHITE-RODGERS
Manufacturer Part Number
21D83M-843
Type
Integrated, Compatible Brand Lennox/White-Rodgers, 25 V
AC
25V
Product Type
Replacement Control Board
Items Controlled
Humidifiers
Replacement for OEM Brands
Lennox

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WHITE-RODGERS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WHITE-RODGERS 21D83M-843 is an OEM replacement integrated furnace control board designed to control humidifiers. It operates at 25V AC and is a direct replacement for Lennox systems, with manufacturer part number 21D83M-843.

Frequently Asked Questions

What is the WHITE-RODGERS 21D83M-843 replacement control board used for?

The WHITE-RODGERS 21D83M-843 is an OEM replacement integrated furnace control board used to control humidifiers in HVAC systems. It is designed as a direct replacement for Lennox equipment, operating at 25V AC to manage humidifier functions reliably.

What are the specifications of the WHITE-RODGERS 21D83M-843 control board?

The WHITE-RODGERS 21D83M-843 is a replacement control board that operates at 25V AC. It controls humidifiers and replaces OEM part number 21D83M-843 for Lennox systems. The board is an integrated furnace control designed for direct compatibility with Lennox HVAC units.

Where to buy the WHITE-RODGERS 21D83M-843 control board worldwide?

You can source the WHITE-RODGERS 21D83M-843 control board through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations, ensuring you receive the correct OEM replacement part for Lennox systems.

How to install the WHITE-RODGERS 21D83M-843 control board?

Installation of the WHITE-RODGERS 21D83M-843 control board requires disconnecting power, removing the old Lennox board, and mounting the replacement. Ensure wiring matches the 25V AC humidifier circuit. Follow standard HVAC safety practices and consult the Lennox system manual for specific connections.

Used in

Common applications for WHITE-RODGERS
Commercial rooftop units — White-Rodgers 36H32-304 universal ignition gas valve for 230,000 BtuH single-stage heating sections
Industrial makeup air heaters — White-Rodgers 36H64-463 dual-stage gas valve for staged combustion control up to 300,000 BtuH
Residential furnaces — White-Rodgers 36G22-254 universal ignition gas valve rated at 140,000 BtuH for direct spark or hot surface ignition
HVAC fan control — White-Rodgers 90 372S1 SPDT fan-control relay with 120V AC coil for blower switching
Industrial control panels — White-Rodgers 4E944 surface-mounted DPDT relay rated 15 A at 277V AC for load switching
Light commercial heating — White-Rodgers 36H33-412 single-stage gas valve rated at 300,000 BtuH for high-capacity burners
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WHITE-RODGERS Products

3G Electric supplies WHITE-RODGERS oem replacement integrated furnace controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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