What MFD capacitor do I need for my ICP AC?

The correct replacement for ICP model RGS300LRFA0AAAA — 45+5 MFD 440V | 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 RGS300LRFA0AAAA — 45+5 MFD 440V | 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 Dual Run Capacitor for RGS300LRFA0AAAA — 45+5 MFD 440V | Ships Today

Name: ICP Dual Run Capacitor for RGS300LRFA0AAAA — 45+5 MFD 440V | Ships Today
Brand: ICP
SKU: 1183001
Price: 32.44 USD
Availability: InStock

SKU: 1183001 Brand: ICP

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Overview

This is a genuine OEM dual run capacitor (part #1183001, capacitor plate assembly) for the ICP / Tempstar / Heil RGS300LRFA0AAAA system. A dual run capacitor stores and delivers the electrical charge needed to keep both the compressor and the condenser fan motor running smoothly. Rated at 45+5 MFD and 440 volts, it provides the continuous torque your motors need under load. When a run capacitor weakens or fails, you'll see hard starting, a humming compressor that won't turn over, a condenser fan that spins slowly or not at all, and breaker trips. Capacitors are the single most common cause of no-cool service calls, and replacing this inexpensive part often restores full operation in minutes.

Specifications

Spec	Value
Part Number	1183001
Type	Dual Run Capacitor
Brand	ICP
Capacitance	45 + 5 MFD
Voltage	440V (compatible with 370V)
Shape	Round

Compatibility

Direct OEM fit for ICP / Tempstar / Heil / Comfortmaker / Heil model RGS300LRFA0AAAA and related RGS300 series units. Always confirm the MFD and voltage rating against your existing capacitor before installing.

Installation Guide

Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter. Capacitors hold a charge.
Access — Remove the condenser service panel.
Document — Photo all wires before disconnecting; note HERM, FAN, and C terminals.
Discharge — Safely discharge the old capacitor across the terminals with an insulated resistor.
Remove — Disconnect leads and loosen the mounting strap; lift out the old capacitor.
Install — Mount the new capacitor, reconnect leads per your photo (HERM to compressor, FAN to fan, C to line).
Test — Restore power and verify the compressor and fan start normally.

Signs You Need a Replacement

Compressor or fan hums but won't start
Condenser fan spins slowly or stalls
Bulging, leaking, or burst capacitor top
Intermittent cooling and breaker trips

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 Dual Run Capacitor for RGS30...

$32.44

Frequently Asked Questions

Does this Capacitor fit my ICP RGS300LRFA0AAAA — 45+5 MFD 440V | Ships Today?

Yes. This is the factory-specified OEM capacitor for the ICP RGS300LRFA0AAAA — 45+5 MFD 440V | 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 RGS300LRFA0AAAA — 45+5 MFD 440V | 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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