What MFD capacitor do I need for my ICP AC?

The correct replacement for ICP model RGS240STAA0AAAA — 440V Rated | 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 RGS240STAA0AAAA — 440V Rated | 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 45+5 MFD for RGS240STAA0AAAA — 440V Rated | Ships Today

Name: ICP Dual Run Capacitor 45+5 MFD for RGS240STAA0AAAA — 440V Rated | Ships Today
Brand: ICP
SKU: 1183001
Price: 32.44 USD
Availability: InStock

SKU: 1183001 Brand: ICP

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Overview

This OEM dual-run capacitor (part #1183001) is a critical electrical component for the ICP/Tempstar/Heil RGS240STAA0AAAA rooftop unit. Rated at 45+5 MFD and 440 volts, it stores and delivers the phase-shifted current required to start and run both the compressor and condenser fan motor. A failing capacitor is one of the most common causes of an HVAC system that hums but won't start, trips the breaker, or short-cycles. Because the dielectric inside degrades over time and with heat exposure, replacement with a genuine OEM-spec part restores reliable startup torque and protects the compressor windings from premature failure.

Specifications

Spec	Value
Part Number	1183001
Type	Dual-Run Capacitor
Brand	ICP (Tempstar / Heil)
Capacitance	45 + 5 MFD
Voltage	440 VAC
Tolerance	±6%

Compatibility

Engineered as a direct-fit replacement for the ICP/Tempstar/Heil RGS240STAA0AAAA gas/electric rooftop package unit. Also serves equivalent ICP-family condensing units using the same dual-run capacitor specification.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter; capacitors can hold a lethal charge.
Access — Remove the service panel covering the electrical compartment.
Document — Photograph all terminal connections (HERM, FAN, C) before disconnecting.
Remove — Discharge the old capacitor across its terminals with an insulated resistor, then disconnect leads and unfasten the mounting strap.
Install — Mount the new capacitor, reconnect each lead to its matching terminal per your photo.
Test — Restore power and confirm the compressor and fan start smoothly.

Signs You Need a Replacement

Unit hums but the compressor or fan won't start
Visible bulging or leaking on the capacitor top
Hard starting, short-cycling, or warm air output
Capacitance reading outside the 45+5 MFD ±6% range

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 45+5 MFD ...

$32.44

Frequently Asked Questions

Does this Capacitor fit my ICP RGS240STAA0AAAA — 440V Rated | Ships Today?

Yes. This is the factory-specified OEM capacitor for the ICP RGS240STAA0AAAA — 440V Rated | 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 RGS240STAA0AAAA — 440V Rated | 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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