Description
When a Carrier HK42FZ furnace board dies, the ICM282B lets you get the system back up and running, saving you a long search for OEM parts. It’s built specifically to replace popular Carrier boards like HK42FZ004/007/008/009/011/013/016/034 and 325878-751, that can control gas valves, ignitors, blower motors, humidifier and air cleaner.
Key Features & Benefits
All-In-One Furnace Control
Runs the gas valve, ignitor, blower motor, inducer, humidifier, and electronic air cleaner from a single board, giving you a single control panel and reducing extra add-on controls.
Microprocessor-Based Precision
Uses a microprocessor to manage ignition and blower timing, giving more consistent starts, run cycles, and safety responses than older mechanical or relay-only controls.
Safety Protection
Designed for 100% gas shutoff if ignition fails and includes reverse-polarity and brownout protection, helping guard the furnace and improve safety when wiring or power conditions aren’t ideal.
LED Diagnostics
LED diagnostics lights flash clear fault codes, so you can quickly identify ignition, flame-sense, or safety-switch issues.
Thermostat and Twinning Compatibility
Compatible with any standard 24 VAC thermostat and can be twinned with another ICM282B, allowing two matching furnaces to run together from a single thermostat when the system is designed for a twinned setup.
Frequently Asked Questions
| Is it safe to use this board on all Carrier HK42FZ-series furnaces? | It’s intended for Carrier furnaces that list those exact HK42FZ part numbers. If your furnace’s OEM board number isn’t on the ICM282B replacement list, don’t assume coverage. Verify by model/serial and the official parts list. |
| Can I use this on Bryant/Payne units that shipped with HK42FZ boards? | Carrier family applies. Many Bryant/Payne models used the same HK42FZ boards; if the original part number matches ICM’s listed replacements, the ICM282B is commonly used there as well. Confirm via parts list/cross-ref. |
| Are there wiring/timing differences if I swap an old ICM282A for a ICM282B? | You can drop in the ICM282B for ICM282A. Distributors list the 282B as replacing ICM282A/ICM282. Wire per the diagram and observe the same safety/lockout behavior. |
| Can I use it in any edge-case applications (different blower sizes, accessories, etc.) as long as loads stay within ratings? | It’s a fixed-speed (single-stage) gas furnace IFC that switches the gas valve, HSI (120 VAC), inducer, and PSC blower taps, plus 24 VAC humidifier and 120 VAC EAC outputs. Stay within the published relay ratings and use a standard 24 VAC thermostat. (No communicating stats. Twinning is ICM282B-to-ICM282B only.) |
