{"product_id":"icm2805a-furnace-control-board-nordyne-903106-624631-replacement","title":"Nordyne 903106 \u0026 624631 Replacement ICM2805A Furnace Control Board","description":"\u003ch1 class=\"n6owBd awi2gc\"\u003eICM Controls ICM2805A Gas Furnace Control Board\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/h1\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003cdiv class=\"otQkpb\" role=\"heading\"\u003e\n\u003cbr\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eThe 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.\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003ch2 class=\"otQkpb\" role=\"heading\"\u003eKey Features\u003c!--TgQPHd|||[]--\u003e\n\u003c\/h2\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eDirect OEM Replacements:\u003c\/strong\u003e 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.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eNoisy Relay Resolution:\u003c\/strong\u003e 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.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eComprehensive Safety Circuit Interlocks:\u003c\/strong\u003e Monitors safety devices continuously, actively assessing rollout switches, limit controls, and pressure parameters to guarantee 100% immediate gas shutoff upon an ignition safety failure.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eOnboard Self Diagnostics:\u003c\/strong\u003e 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.\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003ch2 class=\"otQkpb\" role=\"heading\"\u003eProduct Details \u0026amp; Specifications\u003cbr\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/h2\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e ICM Controls\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e ICM Controls\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003ePart Number: \u003c\/strong\u003eICM2805A\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e ICM2805A\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eUPC: \u003c\/strong\u003e800442013992\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eShipping Weight: 2.5\u003c\/strong\u003e lbs\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eLine Voltage Input: \u003c\/strong\u003e120\/240 VAC @ 60 Hz\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eGas Valve Output Rating:\u003c\/strong\u003e 1A @ 24 VAC\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eInducer Motor Rating:\u003c\/strong\u003e 4A @ 120 VAC\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eHot Surface Ignitor Output:\u003c\/strong\u003e 5A @ 120 VAC\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eHeat Blower Contact Rating:\u003c\/strong\u003e 5A, 1\/2 HP @ 250 VAC\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eCool Blower Contact Rating:\u003c\/strong\u003e 10A, 2 HP @ 240 VAC\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eHumidifier Output:\u003c\/strong\u003e 0.5A @ 24 VAC\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eElectronic Air Cleaner Terminal: \u003c\/strong\u003e1A @ 120 VAC\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003e\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e Hot Surface Ignition (HSI)\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003ch2 class=\"otQkpb\" role=\"heading\"\u003e🛠️ HVAC Depot Pro Tip\u003c!--TgQPHd|||[]--\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003eAlways remember to disconnect the master circuit breaker or high-voltage emergency service switch before accessing the furnace vestibule blower section. \u003cstrong class=\"rQesXe MPyX\"\u003eTake a clear digital picture\u003c!--TgQPHd|||[]--\u003e\u003c\/strong\u003e 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.\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003ch2 class=\"otQkpb\" role=\"heading\"\u003eCross-Reference\u003c!--TgQPHd|||[]--\u003e\n\u003c\/h2\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eNordyne Kit Part Number: 903106-Kit\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eNordyne Legacy Component: 624631\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eNordyne Revision Part: 624631-B\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eWhite-Rodgers Replacement Equivalent: 50T35-730\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eEmerson Equivalent Control Line: 50T35-743\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eJohnstone Supply Catalog Identity: L45-909\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003c!--TgQPHd|||[]--\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd|||[]--\u003e\u003c\/div\u003e\n\u003ch2 class=\"otQkpb\" role=\"heading\"\u003eModel Compatibility\u003c!--TgQPHd|||[]--\u003e\n\u003c\/h2\u003e\n\u003cul class=\"KsbFXc U6u95\"\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eG3RC Series (Suffixes: ALL, 060, 080, 100)\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eG4RC Series (Suffixes: 045, 060, 075, 090, 110)\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eG5RL Series (Suffixes: ALL, E-060, E-080, E-100)\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eG6RA Series (Suffixes: 045C, 060C, 072C, 096C, 120C)\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\n\u003cspan class=\"iNqyIf\"\u003eM2RL Series (Suffixes: A-045, A-060, A-075, A-090)\u003c!--TgQPHd|||[]--\u003e\u003c\/span\u003e\u003c!--TgQPHd|||[]--\u003e\n\u003c\/li\u003e\n\u003cli class=\"Z1qcYe\"\u003e\u003cspan class=\"iNqyIf\"\u003eM3RL Series (Suffixes: ALL, 060, 080, 100)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ICM","offers":[{"title":"Default Title","offer_id":52755202212203,"sku":"ICM2805A","price":195.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/ICM2812-kit-2.jpg?v=1785950690","url":"https:\/\/tophvacparts.com\/products\/icm2805a-furnace-control-board-nordyne-903106-624631-replacement","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}