ICP Run Capacitor 7.5 MFD 370V for RGS300HDFA0AAAA — Ships Today

Overview

This OEM run capacitor with mounting plate, ICP part number 1183001, provides the steady phase shift that keeps the PSC blower motor in your RGS300HDFA0AAAA furnace running smoothly and efficiently. Rated at 7.5 MFD and 370V, the capacitor stores and releases energy to maintain proper torque on the motor's run winding. A weak or failed run capacitor is one of the most common HVAC failures: as the capacitor drifts out of tolerance or shorts, the blower motor draws excess current, runs hot, hums without starting, or stops entirely — which in a furnace can trigger a high-limit shutdown. Replacing a tired capacitor is an inexpensive way to restore full airflow and protect the more expensive blower motor from premature burnout.

Specifications

Compatibility

Direct OEM replacement for the ICP/Tempstar/Heil RGS300HDFA0AAAA furnace and equivalent RGS300-series units marketed under Comfortmaker and Arcoaire. Confirm the MFD and voltage rating stamped on your existing capacitor before installing; a 370V capacitor may be used to replace a 370V or lower-rated unit of the same MFD.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker, then discharge the capacitor across its terminals with an insulated resistor and verify zero voltage with a multimeter.
2. Access — Remove the blower compartment service panel.
3. Document — Photograph the capacitor wiring before disconnecting.
4. Remove — Pull the spade terminals, loosen the mounting plate band/screw, and remove the old capacitor.
5. Install — Secure the new capacitor in the plate and reconnect the leads to the correct terminals per your photo.
6. Test — Restore power, call for blower operation, and confirm the motor starts quickly and runs without humming.

Signs You Need a Replacement

• Blower hums but will not start or is slow to start.
• Weak airflow or motor overheating and tripping the limit.
• Bulged, leaking, or swollen capacitor case.
• Capacitance reads outside ±6% of 7.5 MFD on a meter.

Shipping & Returns

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