What amp contactor do I need for my Lennox system?

The correct replacement for Lennox model OEM Lennox Contactor w/ Auxiliary Switch — 48G59 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 w/ Auxiliary Switch — 48G59.

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 w/ Auxiliary Switch — 48G59

Name: OEM Lennox Contactor w/ Auxiliary Switch — 48G59
Brand: Lennox
SKU: LNX-48G59
Price: 28.95 USD
Availability: InStock

SKU: LNX-48G59 Brand: Lennox

$28.95 $38.95

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The genuine OEM Lennox 48G59 contactor with auxiliary switch is the electrical relay that powers the compressor and condenser fan motor in your Lennox outdoor unit. When your thermostat calls for cooling, the contactor's coil pulls its contacts closed to send line voltage to the compressor. The integrated auxiliary switch provides the additional switching your Lennox control circuit relies on for proper sequencing.

Common failure symptoms: A worn 48G59 contactor may show pitted or burned contacts, chatter or buzz loudly, or weld shut so the outdoor unit runs constantly. Failed contactors can also prevent the unit from starting at all, cause intermittent cooling, or trip breakers due to arcing at the contacts.

Why OEM matters: The authentic Lennox 48G59 is built to the exact coil voltage, amperage rating, and auxiliary-switch configuration your system requires. Generic contactors often lack the correct auxiliary contacts or ratings, leading to control faults and premature burnout. Choosing OEM ensures dependable switching and protects your compressor from damaging electrical faults.

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 w/ Auxiliar...

$28.95

Frequently Asked Questions

Does this Contactor fit my Lennox OEM Lennox Contactor w/ Auxiliary Switch — 48G59?

Yes. This is the factory-specified OEM contactor for the Lennox OEM Lennox Contactor w/ Auxiliary Switch — 48G59. 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 w/ Auxiliary Switch — 48G59?

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 w/ Auxiliary Switch — 48G59

Shipping Information

Return Policy

Frequently Asked Questions