What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model T4A318GKD100 — 24V w/ Shunt | 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 T4A318GKD100 — 24V w/ Shunt | 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 1-Pole 30A Contactor for T4A318GKD100 — 24V w/ Shunt | Ships Today

Name: Tempstar 1-Pole 30A Contactor for T4A318GKD100 — 24V w/ Shunt | Ships Today
Brand: Tempstar
SKU: 1172472-GEN
Price: 32.00 USD
Availability: InStock

SKU: 1172472-GEN Brand: Tempstar

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Overview

This OEM Tempstar 1-Pole 30A Contactor with 24V coil and shunt (part number 1172472) is the switching relay that energizes the compressor and condenser fan in your T4A318GKD100 system. When the thermostat calls for cooling, the 24-volt coil pulls in the contacts to pass line voltage to the compressor. Contactors wear out from arcing, pitting, and welded or chattering contacts. Failure symptoms include a unit that won't start, buzzing at the contactor, intermittent cooling, or contacts that stick closed and keep the compressor running. The integrated shunt matches the OEM circuit for correct operation.

Specifications

Spec	Value
Part Number	1172472
Type	Definite Purpose Contactor (with shunt)
Brand	Tempstar (ICP / Heil)
Poles	1-Pole
Contact Rating	30 Amps
Coil Voltage	24V
Fitment	OEM direct replacement

Compatibility

Factory-correct contactor for the Tempstar T4A318GKD100 condensing unit and matching ICP/Heil/Tempstar models that originally used part 1172472.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the electrical access panel on the condensing unit.
Document — Photograph all line, load, and 24V coil wiring before disconnecting.
Remove — Disconnect the leads, unscrew the old contactor from its mount, and lift it out.
Install — Mount the new contactor and reconnect each lead to the matching terminal per your photo.
Test — Restore power, call for cooling, and confirm the contactor pulls in cleanly and the compressor/fan energize.

Signs You Need a Replacement

Loud buzzing or chattering at the contactor
Pitted, burned, or welded contacts
Compressor won't start on a cooling call
Contacts stick closed and the unit won't shut off

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. 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 1-Pole 30A Contactor fo...

$32.00

Frequently Asked Questions

Does this Contactor fit my Tempstar T4A318GKD100 — 24V w/ Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar T4A318GKD100 — 24V w/ Shunt | 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 T4A318GKD100 — 24V w/ Shunt | 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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