What are the specs for this Control Board?

The correct replacement for ICP model WAHM424A1 — OEM Air Handler Board | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your ICP equipment which lists the model number WAHM424A1 — OEM Air Handler Board | Ships Today.

ICP

ICP Fan Coil Control Board for WAHM424A1 — OEM Air Handler Board | Ships Today

Name: ICP Fan Coil Control Board for WAHM424A1 — OEM Air Handler Board | Ships Today
Brand: ICP
SKU: 1172975
Price: 188.44 USD
Availability: InStock

SKU: 1172975 Brand: ICP

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Overview

This is a genuine OEM fan coil control board (part number 1172975) for the ICP / Tempstar / Heil WAHM424A1 air handler. The control board is the brain of the fan coil — it receives 24V thermostat calls, sequences the blower motor, manages the electric heat relays and time delays, and coordinates the low-voltage safety circuit. When the board fails, the system may not respond to thermostat calls, the blower may run continuously or not at all, electric heat staging may misbehave, or the unit may show no operation despite a healthy transformer and motor. Power surges, lightning, and failed relays or solder joints are the most common causes of board failure.

Specifications

Spec	Value
Part Number	1172975
Type	Fan Coil / Air Handler Control Board
Brand	ICP (Tempstar / Heil)
Control Voltage	24V
Function	Blower sequencing, relay & heat staging control
Fit	OEM Direct Replacement

Compatibility

Direct OEM replacement for the ICP WAHM424A1 fan coil air handler. It also fits the broader WAHM424 series and other ICP/Tempstar/Heil/Comfortmaker fan coil units originally equipped with the 1172975 control board. Verify the part number printed on your existing board before ordering.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before servicing.
Access — Remove the air handler service panel to expose the control box.
Document — Photograph every wire and terminal connection on the existing board before disconnecting anything.
Remove — Label and disconnect the low-voltage and line-voltage leads, then unscrew the board from its standoffs.
Install — Mount the new board on the standoffs and reconnect every wire to the matching terminal per your photo.
Test — Restore power and run a thermostat call to confirm correct blower operation, heat staging, and relay sequencing.

Signs You Need a Replacement

System does not respond to thermostat calls despite good power and transformer
Blower runs continuously or will not start at all
Electric heat stages erratically or fails to energize
Visible scorch marks, burnt relays, or a burnt-electronics odor on the board

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

ICP Fan Coil Control Board for W...

$188.44

Frequently Asked Questions

Does this Control Board fit my ICP WAHM424A1 — OEM Air Handler Board | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP WAHM424A1 — OEM Air Handler Board | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the control board on my ICP WAHM424A1 — OEM Air Handler Board | Ships Today?

Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.

My HVAC system is completely dead. What could be wrong?

Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.

Is this control board compatible with Bryant or Payne too?

Many ICP parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my ICP control board?

OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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