What amp contactor do I need for my Lennox system?

The correct replacement for Lennox model OEM Lennox Contactor — 37656 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 — 37656.

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 — 37656

Name: OEM Lennox Contactor — 37656
Brand: Lennox
SKU: LNX-37656
Price: 28.95 USD
Availability: InStock

SKU: LNX-37656 Brand: Lennox

$28.95 $38.95

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The genuine OEM Lennox 37656 contactor is the electromechanical switch responsible for delivering line voltage to the compressor and condenser fan motor in your Lennox outdoor unit. Each cooling call from the thermostat energizes the contactor's coil, snapping the contacts closed to start the system. Because it switches high inrush current every cycle, the 37656 is a routine wear item that keeps your air conditioner or heat pump running dependably.

Common failure symptoms: Watch for pitted or welded contacts, a loud hum or buzz from the outdoor unit, a coil that fails to energize, or ants and debris fouling the contacts. Telltale signs include the condenser not starting, the fan or compressor running when it shouldn't, or the unit cycling erratically during peak heat.

Why OEM matters: The 37656 is matched to the precise coil voltage and contact amperage your Lennox system demands. A factory-correct contactor ensures clean, reliable switching and proper current handling, shielding your expensive compressor from chatter and voltage instability. Choosing OEM over a universal substitute preserves rated performance and helps protect your Lennox 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 — 37656

$28.95

Frequently Asked Questions

Does this Contactor fit my Lennox OEM Lennox Contactor — 37656?

Yes. This is the factory-specified OEM contactor for the Lennox OEM Lennox Contactor — 37656. 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 — 37656?

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 — 37656

Shipping Information

Return Policy

Frequently Asked Questions