ICP Blower Motor for WPH4304000RKB1 — 1/2 HP Replacement | Ships Today

Overview

This OEM 1/2 HP blower motor (part number 1188128) drives the indoor blower wheel that circulates conditioned air through your ICP/Tempstar/Heil WPH4304000RKB1 system. The motor spins the blower to deliver airflow across the heat exchanger and coil and out through the supply ducts. A failing blower motor reduces airflow, causes the system to overheat or freeze the coil, and eventually leaves you with no air movement at all. Common failure signs include a motor that hums but won't spin, loud bearing noise, intermittent shutdowns from the internal thermal overload, or weak airflow at the registers.

Specifications

Compatibility

Direct OEM fit for the ICP/Tempstar/Heil WPH4304000RKB1 and matching indoor blower assemblies. Confirm horsepower, rotation, shaft size, and mounting before installation when cross-referencing other models.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the blower compartment service panel and slide out the blower assembly.
3. Document — Photograph all motor wires, capacitor leads, and blower wheel position before disconnecting.
4. Remove — Loosen the wheel set screw, pull the wheel, disconnect leads, and unbolt the old motor from the mount.
5. Install — Mount the new motor, reinstall the blower wheel at the same depth, and reconnect leads per your photo.
6. Test — Restore power, run the blower on each speed, and confirm smooth, vibration-free operation and full airflow.

Signs You Need a Replacement

• Motor hums but the blower wheel won't turn
• Loud grinding, squealing, or bearing noise
• Weak airflow or no air from the registers
• System cycles off on thermal overload or smells hot

Shipping & Returns

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