What MFD capacitor do I need for my ICP AC?

The correct replacement for ICP model RGS300LDAA0AGAA — OEM 1183001 | 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 RGS300LDAA0AGAA — OEM 1183001 | Ships Today.

My AC hums but will not start. What part do I need?

An AC that hums but will not start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost needed to start the compressor and fan motors. When it fails, you hear the hum of the motor trying to start but it cannot overcome inertia. Other symptoms include the fan spinning slowly, the AC cycling on and off rapidly, or a visibly swollen or leaking capacitor. Replacement cost: $15 to $80 for the part, DIY in 30 minutes.

ICP

ICP Run Capacitor 7.5 MFD 370V for RGS300LDAA0AGAA — OEM 1183001 | Ships Today

Name: ICP Run Capacitor 7.5 MFD 370V for RGS300LDAA0AGAA — OEM 1183001 | Ships Today
Brand: ICP
SKU: 1183001
Price: 33.80 USD
Availability: InStock

SKU: 1183001 Brand: ICP

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Overview

This is the OEM run capacitor (part number 1183001) for the ICP / Heil / Tempstar RGS300LDAA0AGAA gas furnace. Rated at approximately 7.5 MFD / 370V, this capacitor provides the steady phase-shifted current that keeps the PSC blower motor running efficiently. A weak or failed run capacitor causes the blower motor to hum, struggle to start, overheat, or stop running entirely, which leads to poor airflow, overheating lockouts, and shortened motor life. Capacitors are an inexpensive, high-wear component and are often the root cause when a motor that otherwise tests good will not spin up.

Specifications

Spec	Value
Part Number	1183001
Type	Single Run Capacitor
Capacitance	7.5 MFD
Voltage	370V
Brand	ICP / Heil / Tempstar
Application	Furnace Blower Motor

Compatibility

Directly fits the ICP RGS300LDAA0AGAA gas furnace and related RGS-series furnaces in the ICP family (Heil, Tempstar, Comfortmaker). Confirm the OEM number 1183001 and the MFD/voltage rating printed on your existing capacitor before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker. Verify zero voltage with a multimeter and discharge the old capacitor before handling.
Access — Remove the furnace blower compartment service panel.
Document — Photograph the capacitor terminal wiring before disconnecting.
Remove — Discharge the capacitor across its terminals with an insulated resistor, disconnect the leads, and remove the mounting strap.
Install — Secure the new capacitor and reconnect the leads per your photo.
Test — Restore power and confirm the blower motor starts promptly and runs smoothly.

Signs You Need a Replacement

Blower motor hums but will not start
Motor starts slowly or runs hot
Bulging, leaking, or visibly swollen capacitor top
Weak airflow or intermittent blower operation

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 Run Capacitor 7.5 MFD 370V f...

$33.80

Frequently Asked Questions

Does this Capacitor fit my ICP RGS300LDAA0AGAA — OEM 1183001 | Ships Today?

Yes. This is the factory-specified OEM capacitor for the ICP RGS300LDAA0AGAA — OEM 1183001 | 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 capacitor on my ICP RGS300LDAA0AGAA — OEM 1183001 | Ships Today?

Difficulty: Easy (20–30 min)
Step 1: Turn off power at breaker. Step 2: Open condensing unit panel. Step 3: Photograph the old capacitor wiring (Common/Herm/Fan). Step 4: Discharge old capacitor with insulated screwdriver. Step 5: Disconnect and remove old capacitor. Step 6: Mount new capacitor, reconnect wires to matching terminals. Step 7: Close panel, restore power, test. Tools: screwdriver, needle-nose pliers.

My AC hums but won’t start. What part do I need?

An AC that hums but won’t start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost to start the compressor. When it fails, you hear humming but the motor can’t overcome inertia. Other symptoms: fan spinning slowly, AC cycling on/off rapidly, or a visibly swollen capacitor. Fix: replace capacitor ($15–$80 DIY, 30 min).

Is this capacitor 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 capacitor?

OEM strongly recommended. OEM capacitors have ±6% MFD tolerance vs aftermarket ±10%. The looser tolerance causes motor winding stress, higher temps, and shorter compressor life. Price difference is only $10–$20 — OEM is the clear value choice.

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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