What MFD capacitor do I need for my ICP AC?

The correct replacement for ICP model WFML110C066B1 — Oval | 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 WFML110C066B1 — Oval | 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 WFML110C066B1 — Oval | Ships Today

Name: ICP Run Capacitor 7.5 MFD 370V for WFML110C066B1 — Oval | Ships Today
Brand: ICP
SKU: 1170643
Price: 24.64 USD
Availability: InStock

SKU: 1170643 Brand: ICP

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Overview

This genuine OEM oval run capacitor (part number 1170643) is engineered for the ICP/Tempstar/Heil WFML110C066B1 gas furnace. Rated at 7.5 MFD and 370 volts, the capacitor provides the steady phase shift the blower motor needs to start and run efficiently. A run capacitor stores and releases electrical energy on every cycle; when it weakens or fails, the blower motor draws excessive current, overheats, hums without starting, or stops moving air entirely. Replacing a tired capacitor restores full airflow, protects the motor windings, and keeps the furnace running at rated efficiency. This oval-bodied capacitor is sealed for long service life and includes the factory strap mounting profile for a secure, vibration-resistant fit.

Specifications

Spec	Value
Part Number	1170643
Type	Single Run Capacitor (Oval)
Brand	ICP / Tempstar / Heil
Capacitance	7.5 MFD
Voltage	370V
Mounting	Oval strap
Fitment	OEM Replacement

Compatibility

Designed as a direct OEM replacement for the ICP WFML110C066B1 furnace and shared across the ICP family of brands including Tempstar, Heil, Comfortmaker, and Day & Night equipment that uses the 1170643 capacitor. Always confirm the MFD and voltage rating 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. Capacitors hold a charge — discharge across the terminals with an insulated resistor before touching.
Access — Remove the furnace blower compartment service panel.
Document — Photograph all wire connections before disconnecting.
Remove — Loosen the mounting strap, unplug the spade terminals, and lift out the old oval capacitor.
Install — Mount the new capacitor in the strap and reconnect the terminals exactly per your photo.
Test — Restore power and confirm the blower starts promptly and runs smoothly without humming.

Signs You Need a Replacement

Blower motor hums but will not start.
Weak or reduced airflow from the registers.
Visible bulging, leaking, or a swollen capacitor top.
Motor overheats and trips on thermal overload.

Shipping & Returns

Ships same day on orders placed 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...

$24.64

Frequently Asked Questions

Does this Capacitor fit my ICP WFML110C066B1 — Oval | Ships Today?

Yes. This is the factory-specified OEM capacitor for the ICP WFML110C066B1 — Oval | 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 WFML110C066B1 — Oval | 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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