What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model T4H318GKA100 — 24V Coil 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 T4H318GKA100 — 24V Coil 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 T4H318GKA100 — 24V Coil w/ Shunt | Ships Today

Name: Tempstar 1-Pole 30A Contactor for T4H318GKA100 — 24V Coil w/ Shunt | Ships Today
Brand: Tempstar
SKU: 1172472-GEN
Price: 26.00 USD
Availability: InStock

SKU: 1172472-GEN Brand: Tempstar

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Overview

This genuine OEM single-pole 30-amp definite purpose contactor (Tempstar part 1172472) is the electrical switch that powers the outdoor unit's compressor and condenser fan. It has a 24V control coil and an integrated shunt for the start circuit. When the thermostat calls for cooling, the 24V coil pulls the contacts closed and sends line voltage to the compressor. Pitted, welded, or chattering contacts are one of the most common no-cool service calls. Symptoms of a failing contactor include the outdoor unit not starting, a loud buzzing or humming at the contactor, contacts that stick closed so the unit never shuts off, or visibly burned and pitted contact points.

Specifications

Spec	Value
Part Number	1172472
Type	Single-Pole Definite Purpose Contactor
Brand	Tempstar (ICP / Heil family)
Contact Rating	30 Amp
Poles	1
Coil Voltage	24V
Feature	Integrated Shunt
Fitment	OEM Direct Replacement

Compatibility

Direct-fit replacement for the Tempstar T4H318GKA100 condensing unit and other ICP, Heil, and Comfortmaker platform units using the same 1-pole 30A 24V contactor with shunt. Confirm coil voltage (24V) and amp rating before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the condenser service panel to expose the contactor.
Document — Photograph every wire and terminal position before disconnecting.
Remove — Label and disconnect all leads, then unscrew the contactor from its mounting bracket.
Install — Mount the new contactor and reconnect each wire to the matching terminal per your photo.
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 fails to start on a cooling call.
Loud buzzing, humming, or chattering at the contactor.
Contacts stuck closed — unit runs continuously.
Burned, pitted, or welded contact points.

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...

$26.00

Frequently Asked Questions

Does this Contactor fit my Tempstar T4H318GKA100 — 24V Coil w/ Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar T4H318GKA100 — 24V Coil 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 T4H318GKA100 — 24V Coil 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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