ICP X-13 ECM Motor Control for WAHM424A1 — 1/2 HP Blower | Ships Today
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Overview
This is a genuine OEM X-13 ECM blower motor control (part number 1185284) for the ICP / Tempstar / Heil WAHM424A1 fan coil air handler. Rated at 1/2 HP, this constant-torque ECM (electronically commutated motor) drives the indoor blower wheel that moves conditioned air through the duct system. Unlike a standard PSC motor, the X-13 ECM runs at programmed torque settings selected by tap, delivering quieter operation, better airflow consistency, and higher efficiency. When this motor fails, you'll see weak or no airflow at the registers, intermittent blower operation, unusual noise, or a system that cools/heats but never reaches setpoint because air isn't moving. A failed module or worn bearings are the most common failure points.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1185284 |
| Type | X-13 ECM Blower Motor Control |
| Brand | ICP (Tempstar / Heil) |
| Horsepower | 1/2 HP |
| Motor Class | Constant-Torque ECM (X-13) |
| Application | Indoor Blower / Fan Coil |
| Fit | OEM Direct Replacement |
Compatibility
Direct OEM replacement for the ICP WAHM424A1 fan coil. It also fits the broader WAHM424 air handler series and other ICP/Tempstar/Heil/Comfortmaker fan coils that originally used the 1185284 1/2 HP X-13 ECM motor control. Confirm horsepower and the OEM part number on your existing motor 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 blower compartment service panel.
- Document — Photograph all power and control/tap wiring and the blower wheel set-screw position before disconnecting.
- Remove — Loosen the blower wheel set screw, slide the assembly out, then unbolt the motor from the blower housing and transfer the wheel.
- Install — Mount the new ECM motor, reinstall the blower wheel at the documented depth, and reconnect power and tap wiring per your photo.
- Test — Restore power and verify smooth start-up, correct airflow, and quiet operation at each speed tap.
Signs You Need a Replacement
- Weak airflow or no airflow at the supply registers
- Blower won't start, or starts intermittently
- Grinding, humming, or rattling noise from the blower compartment
- System runs but never reaches thermostat setpoint due to poor air movement
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