What MFD capacitor do I need for my Lennox AC?

The correct replacement for Lennox model OEM Lennox Dual Run Capacitor 70/7.5 MFD 370V — 89M88 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 Lennox equipment which lists the model number OEM Lennox Dual Run Capacitor 70/7.5 MFD 370V — 89M88.

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.

Lennox

OEM Lennox Dual Run Capacitor 70/7.5 MFD 370V — 89M88

Name: OEM Lennox Dual Run Capacitor 70/7.5 MFD 370V — 89M88
Brand: Lennox
SKU: LNX-89M88
Price: 18.95 USD
Availability: InStock

SKU: LNX-89M88 Brand: Lennox

$18.95 $24.95

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The genuine OEM Lennox 89M88 is a dual run capacitor rated at 70+7.5 MFD, 370V, in a round can. It houses two capacitors in one unit — the 70 MFD side serves the compressor and the 7.5 MFD side serves the outdoor condenser fan motor — supplying the running charge and phase shift both motors require to operate efficiently in your Lennox system.

Common failure symptoms: A compressor or fan that hums without starting, a condenser fan spinning slowly or not at all, tripped breakers, weak or no cooling, and repeated clicking during start-up attempts. A domed, swollen, or leaking capacitor top confirms the part has failed. Exposed to constant heat, capacitors are one of the most common HVAC components to wear out and a frequent source of no-cool complaints.

Why OEM matters: The 89M88 is built to Lennox's exact 70+7.5 MFD and 370V ratings, ensuring your motors get the precise torque and current they were designed for. Non-OEM capacitors can drift out of tolerance, run motors hot, and shorten compressor life. Fitting the genuine factory part keeps your Lennox equipment operating at full rated efficiency.

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

OEM Lennox Dual Run Capacitor 70...

$18.95

Frequently Asked Questions

Does this Capacitor fit my Lennox OEM Lennox Dual Run Capacitor 70/7.5 MFD 370V — 89M88?

Yes. This is the factory-specified OEM capacitor for the Lennox OEM Lennox Dual Run Capacitor 70/7.5 MFD 370V — 89M88. 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 Lennox OEM Lennox Dual Run Capacitor 70/7.5 MFD 370V — 89M88?

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 Lennox 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 Lennox 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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OEM Lennox Dual Run Capacitor 70/7.5 MFD 370V — 89M88

Shipping Information

Return Policy

Frequently Asked Questions