What amp contactor do I need for my Lennox system?

The correct replacement for Lennox model OEM Lennox FirstChoice Contactor 1-Pole 30A 24V — Y4623 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 1-Pole 30A 24V — Y4623.

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 1-Pole 30A 24V — Y4623

Name: OEM Lennox FirstChoice Contactor 1-Pole 30A 24V — Y4623
Brand: Lennox
SKU: LNX-Y4623
Price: 28.95 USD
Availability: InStock

SKU: LNX-Y4623 Brand: Lennox

$28.95 $38.95

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The genuine OEM Lennox Y4623 is a FirstChoice EC30124-EW single-pole contactor rated at 30 amps with a 24-volt control coil. This electromechanical switch energizes when the thermostat calls for cooling, closing its contacts to send line voltage to the compressor and condenser fan motor in your Lennox outdoor unit. As the electrical heart of the condenser's switching circuit, a healthy contactor is essential for consistent, reliable cooling.

Contactors wear out over time. Common failure symptoms include a unit that won't start, an outdoor fan and compressor that hum but won't engage, chattering or buzzing from the control panel, pitted or burned contacts, and a stuck contactor that keeps the compressor running even after the thermostat is satisfied. Insects and debris lodging in the contacts are also frequent culprits.

Choosing the OEM Lennox Y4623 guarantees the correct 30A/24V ratings, coil pull-in voltage, and terminal layout for your Lennox equipment. Aftermarket substitutes can differ in coil sensitivity and contact rating, leading to premature failure or nuisance trips. This factory-spec part drops in for a direct, worry-free replacement.

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 1-Pole 30A 24V — Y4623?

Yes. This is the factory-specified OEM contactor for the Lennox OEM Lennox FirstChoice Contactor 1-Pole 30A 24V — Y4623. 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 1-Pole 30A 24V — Y4623?

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 1-Pole 30A 24V — Y4623

Shipping Information

Return Policy

Frequently Asked Questions