What amp contactor do I need for my Lennox system?

The correct replacement for Lennox model OEM Lennox FirstChoice Contactor 2-Pole 30A 24V — Y4624 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 FirstChoice Contactor 2-Pole 30A 24V — Y4624.

My AC clicks but the compressor does not turn on. What is wrong?

Clicking from the outdoor unit without the compressor starting usually means a worn contactor. The contactor is the relay that sends power to the compressor. When its contacts are pitted or worn, it clicks but cannot establish a solid electrical connection. Other symptoms: visible pitting or burn marks on the contactor face, AC works intermittently, or buzzing from the contactor.

Lennox

OEM Lennox FirstChoice Contactor 2-Pole 30A 24V — Y4624

Name: OEM Lennox FirstChoice Contactor 2-Pole 30A 24V — Y4624
Brand: Lennox
SKU: LNX-Y4624
Price: 28.95 USD
Availability: InStock

SKU: LNX-Y4624 Brand: Lennox

$28.95 $38.95

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The genuine OEM Lennox Y4624 is a FirstChoice EC30224-EW double-pole contactor rated at 30 amps with a 24-volt control coil. When the thermostat calls for cooling, the 24V coil pulls in and both poles close simultaneously, switching line voltage to the compressor and condenser fan in your Lennox outdoor unit. The two-pole design breaks both legs of the line, providing complete circuit isolation for the compressor when the system is off.

Like all contactors, the Y4624 is a high-cycle wear item. Watch for these failure symptoms: the outdoor unit fails to start, the compressor and fan buzz but never engage, loud chattering at the contactor, welded or pitted contacts that keep the compressor energized, or visible arcing and burn marks on the terminals.

Installing the OEM Lennox Y4624 ensures exact 30A/24V ratings and factory-correct coil and terminal specifications for your Lennox system. Generic replacements may not match the coil pull-in characteristics or contact durability Lennox engineered for, risking short life and callbacks. This is a genuine, direct-fit part.

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 FirstChoice Contactor...

$28.95

Frequently Asked Questions

Does this Contactor fit my Lennox OEM Lennox FirstChoice Contactor 2-Pole 30A 24V — Y4624?

Yes. This is the factory-specified OEM contactor for the Lennox OEM Lennox FirstChoice Contactor 2-Pole 30A 24V — Y4624. 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 contactor on my Lennox OEM Lennox FirstChoice Contactor 2-Pole 30A 24V — Y4624?

Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Open condensing unit panel. Step 3: Photograph ALL wiring on the contactor. Step 4: Label each wire with tape. Step 5: Disconnect wires and remove old contactor. Step 6: Mount new contactor, reconnect wires matching your photo. Step 7: Restore power and test.

My AC clicks but the compressor won’t turn on. What’s wrong?

Clicking from the outdoor unit without the compressor starting = worn contactor. The contactor sends power to the compressor. When its contacts are pitted, it clicks but can’t make solid contact. Look for: visible pitting/burn marks on the contactor face, intermittent operation, or buzzing.

Is this contactor 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 contactor?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

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 FirstChoice Contactor 2-Pole 30A 24V — Y4624

Shipping Information

Return Policy

Frequently Asked Questions