What MFD capacitor do I need for my ICP AC?

The correct replacement for ICP model WFSR040A030A2 — Blower Motor | 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 WFSR040A030A2 — Blower Motor | 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 5 MFD 370V for WFSR040A030A2 — Blower Motor | Ships Today

Name: ICP Run Capacitor 5 MFD 370V for WFSR040A030A2 — Blower Motor | Ships Today
Brand: ICP
SKU: 1170643
Price: 22.04 USD
Availability: InStock

SKU: 1170643 Brand: ICP

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Overview

This OEM oval run capacitor with strap (part #1170643) supports the blower motor on your ICP/Heil/Tempstar WFSR040A030A2 gas furnace. Rated at 5 MFD and 370 volts, it delivers the phase-shifted current the motor needs to start and run at proper speed. When a capacitor weakens or fails the blower may hum without starting, run hot, cycle on its overload, or quit entirely — leaving you with little or no airflow. The included oval mounting strap secures the capacitor firmly inside the cabinet.

Specifications

Spec	Value
Part Number	1170643
Type	Single-Run Capacitor
Brand	ICP / Heil / Tempstar
Capacitance	5 MFD
Voltage	370V
Shape	Oval
Mounting	Oval strap included

Compatibility

Direct-fit OEM replacement for the ICP/Heil/Tempstar WFSR040A030A2 furnace and related WFSR-series models that share the same blower assembly. Always verify the MFD and voltage rating stamped on your existing capacitor before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter. A capacitor can hold a lethal charge.
Access — Remove the furnace blower service panel.
Document — Photograph all wire connections before disconnecting anything.
Remove — Discharge the old capacitor across its terminals with an insulated resistor, label and remove the wires, then unscrew the mounting strap.
Install — Mount the new capacitor with the included oval strap and reconnect the wires exactly per your photo.
Test — Restore power and confirm the blower starts immediately and runs steadily.

Signs You Need a Replacement

Blower motor hums but won't start, or starts slowly
Bulging, leaking, or burst capacitor casing
Motor overheats or trips on thermal overload
Weak or intermittent airflow from the furnace

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 5 MFD 370V for...

$22.04

Frequently Asked Questions

Does this Capacitor fit my ICP WFSR040A030A2 — Blower Motor | Ships Today?

Yes. This is the factory-specified OEM capacitor for the ICP WFSR040A030A2 — Blower Motor | 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 WFSR040A030A2 — Blower Motor | 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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