What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model T4A660GKA100 — 24V Coil | Ships Today 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 Tempstar equipment which lists the model number T4A660GKA100 — 24V Coil | Ships Today.

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.

Is this contactor compatible with Bryant or Payne systems too?

Many Tempstar parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Tempstar

Tempstar 2-Pole 40A Contactor for T4A660GKA100 — 24V Coil | Ships Today

Name: Tempstar 2-Pole 40A Contactor for T4A660GKA100 — 24V Coil | Ships Today
Brand: Tempstar
SKU: 1172786-GEN
Price: 32.95 USD
Availability: InStock

SKU: 1172786-GEN Brand: Tempstar

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Overview

This OEM 2-pole definite-purpose contactor (part number 1172786) is the switch that powers the compressor and condenser fan motor in your Tempstar T4A660GKA100 air conditioner. Rated at 40 amps with a 24-volt control coil, it pulls its contacts closed when the thermostat calls for cooling, sending line voltage to the outdoor unit. Contactors take heavy electrical wear because the contacts arc each time they open and close, making them a frequent failure point. Common symptoms include a unit that won't start, a steady hum or chatter at the contactor, pitted or burned contacts, or an outdoor unit that runs nonstop even after cooling is satisfied.

Specifications

Spec	Value
OEM Part Number	1172786
Type	Definite Purpose Contactor
Poles	2-Pole
Contact Rating	40 Amps
Coil Voltage	24 VAC
Brand	Tempstar (ICP / Heil)
Fits Model	T4A660GKA100

Compatibility

A direct OEM replacement for the Tempstar T4A660GKA100 condensing unit. The 1172786 contactor is used across many ICP-family outdoor units (Tempstar, Heil, Comfortmaker, and related Carrier-engineered platforms). Confirm the number printed on your existing contactor before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter before touching any wiring.
Access — Remove the electrical access panel on the condensing unit.
Document — Photograph all wire connections to match them exactly on the new contactor.
Remove — Move the line, load, and 24V coil wires one at a time, then unscrew the old contactor from its mounting bracket.
Install — Mount the new contactor, reconnect each wire per your photo, and verify the 24V coil leads are landed correctly.
Test — Restore power, call for cooling, and confirm the contacts pull in and the compressor and fan start.

Signs You Need a Replacement

Outdoor unit won't start or only buzzes when cooling is called
Loud humming, chattering, or clicking at the contactor
Visibly pitted, burned, or welded contacts
Compressor and fan keep running after the thermostat is satisfied

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.

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

Tempstar 2-Pole 40A Contactor fo...

$32.95

Frequently Asked Questions

Does this Contactor fit my Tempstar T4A660GKA100 — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar T4A660GKA100 — 24V Coil | Ships Today. 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 Tempstar T4A660GKA100 — 24V Coil | Ships Today?

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 Tempstar 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 Tempstar 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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