What amp contactor do I need for my Lennox system?

The correct replacement for Lennox model OEM Lennox Contactor 40A 1.5-Pole 24V Coil — Y9370 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 Contactor 40A 1.5-Pole 24V Coil — Y9370.

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 Contactor 40A 1.5-Pole 24V Coil — Y9370

Name: OEM Lennox Contactor 40A 1.5-Pole 24V Coil — Y9370
Brand: Lennox
SKU: LNX-Y9370
Price: 28.95 USD
Availability: InStock

SKU: LNX-Y9370 Brand: Lennox

$28.95 $38.95

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The genuine OEM Lennox Y9370 is a definite-purpose contactor (Mars 17415 equivalent) rated at 40 amps, 1.5 pole, with a 24-volt control coil and screw lugs. It acts as the electrical switch that energizes your outdoor condensing unit's compressor and fan motor whenever the thermostat calls for cooling, opening and closing hundreds of times per season under high current loads.

Common failure symptoms: If the Y9370 contactor fails, you may notice the outdoor unit won't start, a chattering or buzzing sound at the contactor, pitted or burned contacts, welded contacts that keep the compressor running continuously, or a system that trips the breaker. Insects and corrosion frequently damage the contact points over time.

Why OEM matters: A genuine Lennox Y9370 is built to the exact voltage, amperage, and coil specifications your system was engineered around, ensuring reliable pull-in, proper contact pressure, and full service life. Aftermarket substitutes with mismatched coil voltage or contact ratings can cause premature failure, short-cycling, or damage to your compressor. Installing the correct OEM part protects your Lennox equipment and your warranty.

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 Contactor 40A 1.5-Pol...

$28.95

Frequently Asked Questions

Does this Contactor fit my Lennox OEM Lennox Contactor 40A 1.5-Pole 24V Coil — Y9370?

Yes. This is the factory-specified OEM contactor for the Lennox OEM Lennox Contactor 40A 1.5-Pole 24V Coil — Y9370. 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 Contactor 40A 1.5-Pole 24V Coil — Y9370?

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 Contactor 40A 1.5-Pole 24V Coil — Y9370

Shipping Information

Return Policy

Frequently Asked Questions