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Nordyne 903106 & 624631 Replacement ICM2805A Furnace Control Board

Nordyne 903106 & 624631 Replacement ICM2805A Furnace Control Board

Low stock: 3 left

Regular price $195.55 USD
Regular price Sale price $195.55 USD
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Shipping calculated at checkout.

Nordyne & Miller Replacement Specs

  • Direct Nordyne Replacement. Replaces 903106 and 624631 series boards in Nordyne, Miller, and Intertherm G3–G6 and M-series furnaces.

  • 2 HP Blower Support. Features high-capacity 30A relays for heavy-duty 240V cooling blowers.

  • Diagnostic LED Interface. Onboard LEDs provide clear flash codes for fast troubleshooting of safety and ignition faults.

  • USA-Made Quality. Proudly manufactured in the USA by ICM Controls for maximum reliability and safety.

  • Microprocessor accuracy coordinates precise ignition timings to eliminate intermittent burner ignition lockouts.

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Specifications

Product Details & Specifications

  • Brand: ICM Controls
  • Manufacturer: ICM Controls
  • Part Number: ICM2805A
  • SKU: ICM2805A
  • UPC: 800442013992
  • Shipping Weight: 2.5 lbs
  • Line Voltage Input: 120/240 VAC @ 60 Hz
  • Gas Valve Output Rating: 1A @ 24 VAC
  • Inducer Motor Rating: 4A @ 120 VAC
  • Hot Surface Ignitor Output: 5A @ 120 VAC
  • Heat Blower Contact Rating: 5A, 1/2 HP @ 250 VAC
  • Cool Blower Contact Rating: 10A, 2 HP @ 240 VAC
  • Humidifier Output: 0.5A @ 24 VAC
  • Electronic Air Cleaner Terminal: 1A @ 120 VAC
  • Ignition Type: Hot Surface Ignition (HSI)

description

ICM Controls ICM2805A Gas Furnace Control Board


The ICM Controls ICM2805A is an engineered direct-hire original equipment manufacturer (OEM) replacement furnace control board designed explicitly for 80+ and 90+ model gas furnaces. This micro-processor based component regulates fundamental automated cycles, safely orchestrating the operation of the hot surface ignitor, gas valve, inducer draft motor, and the main circulating blower. Engineered for compatibility across specific Nordyne equipment families, this module provides seamless form, fit, and functional execution within G3, G4, G5, G6, M2, and M3 series residential furnace platforms. This replacement board utilizes advanced system software engineered to properly optimize safety timings and airflow controls for counterflow and downflow applications.

Key Features

  • Direct OEM Replacements: Engineered to seamlessly drop into critical applications, the ICM2805A provides a standard physical and electrical profile to replace old or obsolete furnace control modules without modifications.
  • Noisy Relay Resolution: Features high-quality copper contacts and specialized heavy-duty relays designed to isolate electrical arc frequencies, permanently resolving humming, clicking, or chatter issues caused by aged components.
  • Comprehensive Safety Circuit Interlocks: Monitors safety devices continuously, actively assessing rollout switches, limit controls, and pressure parameters to guarantee 100% immediate gas shutoff upon an ignition safety failure.
  • Onboard Self Diagnostics: Integrates a clear red diagnostic LED array to accelerate troubleshooting by generating explicit error flash codes to signal lockouts, flame sensing faults, or incorrect supply polarity.

Product Details & Specifications

  • Brand: ICM Controls
  • Manufacturer: ICM Controls
  • Part Number: ICM2805A
  • SKU: ICM2805A
  • UPC: 800442013992
  • Shipping Weight: 2.5 lbs
  • Line Voltage Input: 120/240 VAC @ 60 Hz
  • Gas Valve Output Rating: 1A @ 24 VAC
  • Inducer Motor Rating: 4A @ 120 VAC
  • Hot Surface Ignitor Output: 5A @ 120 VAC
  • Heat Blower Contact Rating: 5A, 1/2 HP @ 250 VAC
  • Cool Blower Contact Rating: 10A, 2 HP @ 240 VAC
  • Humidifier Output: 0.5A @ 24 VAC
  • Electronic Air Cleaner Terminal: 1A @ 120 VAC
  • Ignition Type: Hot Surface Ignition (HSI)

🛠️ HVAC Depot Pro Tip

Always remember to disconnect the master circuit breaker or high-voltage emergency service switch before accessing the furnace vestibule blower section. Take a clear digital picture of all the existing field wiring connections and multi-pin molex harnesses on your original board before separating any terminals. Transfer each terminal wire individually to the matching terminal point on the replacement board to avoid cross-wiring the line and neutral polarity. Once safely installed, apply power and perform a visual check using your multimeter across terminals R and C to verify a stable 24 VAC secondary transformer output voltage before initiating a thermostat heating demand.

Cross-Reference

  • Nordyne Kit Part Number: 903106-Kit
  • Nordyne Legacy Component: 624631
  • Nordyne Revision Part: 624631-B
  • White-Rodgers Replacement Equivalent: 50T35-730
  • Emerson Equivalent Control Line: 50T35-743
  • Johnstone Supply Catalog Identity: L45-909

Model Compatibility

  • G3RC Series (Suffixes: ALL, 060, 080, 100)
  • G4RC Series (Suffixes: 045, 060, 075, 090, 110)
  • G5RL Series (Suffixes: ALL, E-060, E-080, E-100)
  • G6RA Series (Suffixes: 045C, 060C, 072C, 096C, 120C)
  • M2RL Series (Suffixes: A-045, A-060, A-075, A-090)
  • M3RL Series (Suffixes: ALL, 060, 080, 100)

Specification

Refund policy

Refund & Return Policy

Last Updated: June 2026

At HVAC Parts & Equipment Depot, customer satisfaction is important to us. This Refund & Return Policy explains how returns, exchanges, and refunds are handled for purchases made through TopHVACParts.com.

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

  • The item must be unused, uninstalled, and in its original condition.
  • The item must be returned in its original packaging.
  • Model numbers and serial numbers must match the original purchase records.
  • Proof of purchase or order confirmation is required.

Non-Returnable Items

The following items are not eligible for return or refund:

  • Installed or used parts.
  • Products showing signs of installation, modification, or damage caused after delivery.
  • Items missing original packaging.
  • Sale or clearance items.
  • Special-order or custom-order products.
  • Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

support@tophvacparts.com

Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

  • Refunds will be issued to the original payment method.
  • Processing typically takes 7–14 business days after approval.
  • Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

  • Our shipping error,
  • A defective product,
  • A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.

Celest G.
Verified Customer
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