ICP Blower Run Capacitor for RGS303SRFA0AAAA — 7.5 MFD 370V | Ships Today

Overview

This genuine OEM run capacitor (part number 1183001) provides the steady phase shift the blower motor needs to run smoothly on ICP, Heil, and Tempstar gas furnaces including the RGS303SRFA0AAAA. Rated at 7.5 MFD and 370 volts, the capacitor stores and releases energy to keep the PSC blower motor's start and run windings in proper electrical phase, delivering full torque and quiet, efficient airflow across the furnace heat exchanger.

Capacitors are one of the most common HVAC failure points. As the dielectric degrades, capacitance drifts out of spec and the motor draws excess current, runs hot, hums, struggles to start, or trips on overload. A bulging or leaking can, or a reading well below the 7.5 MFD rating, is a clear sign the part has reached the end of its life. Replacing it with the correct OEM-rated capacitor restores rated airflow and protects the more expensive blower motor from premature failure.

Specifications

Compatibility

Fits the RGS303SRFA0AAAA and other ICP / Heil / Tempstar / Comfortmaker gas furnaces specifying the 1183001 run capacitor. Confirm the MFD and voltage rating printed on your existing capacitor before ordering; a higher voltage rating is acceptable but the MFD value must match.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage, then safely discharge the old capacitor across its terminals through a resistor before handling.
2. Access — Remove the blower-compartment service panel to expose the capacitor.
3. Document — Photograph the terminal wiring before disconnecting any leads.
4. Remove — Pull the spade connectors, loosen the mounting strap, and lift out the old capacitor.
5. Install — Secure the new 7.5 MFD capacitor in the strap and reconnect each lead to the matching terminal per your photo.
6. Test — Restore power, call for heat, and confirm the blower spins up quickly and runs without humming or hesitation.

Signs You Need a Replacement

• Blower motor hums but is slow to start or will not start
• Visibly bulging, swollen, or leaking capacitor can
• Measured capacitance well below the 7.5 MFD rating
• Motor overheating or tripping the limit during blower operation

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.