What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model T4H418GKA100 — 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 T4H418GKA100 — 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 T4H418GKA100 — 24V Coil w/Shunt | Ships Today

Name: Tempstar 1-Pole 30A Contactor for T4H418GKA100 — 24V Coil w/Shunt | Ships Today
Brand: Tempstar
SKU: 1172472-GEN
Price: 34.00 USD
Availability: InStock

SKU: 1172472-GEN Brand: Tempstar

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Overview

This OEM 1-pole, 30-amp definite purpose contactor (part 1172472) with a 24V coil and shunt is the primary switching relay for the Tempstar T4H418GKA100 condensing unit. When the thermostat calls for cooling, the 24-volt coil pulls the contactor closed, sending line voltage to the compressor and condenser fan motor. The integrated shunt provides a current path that keeps low-voltage control circuits energized as designed. Contactors are high-wear parts: their contacts pit, burn, and weld over thousands of cycles. A failed contactor is one of the most common no-cool service calls — the outdoor unit goes silent, or in a welded-contact failure, the compressor runs continuously and won't shut off.

Specifications

Spec	Value
OEM Part Number	1172472
Type	Definite Purpose Contactor (w/ Shunt)
Brand	Tempstar (ICP / Heil)
Contact Rating	30 Amp
Poles	1-Pole
Coil Voltage	24V

Compatibility

Designed for the Tempstar T4H418GKA100 and compatible ICP/Heil/Comfortmaker condensing units calling for the 1172472 contactor. Verify pole count, amp rating, and 24V coil against the contactor currently installed before swapping.

Installation Guide

Safety First — Disconnect power at the breaker and pull the outdoor disconnect. Verify zero voltage across the contactor terminals with a multimeter.
Access — Remove the unit's electrical access panel.
Document — Photograph every line, load, and coil wire before disconnecting.
Remove — Note wire positions, disconnect the spade terminals, and unscrew the failed contactor from its mounting.
Install — Mount the new contactor and reconnect each wire exactly per your photo, confirming the 24V coil leads land correctly.
Test — Restore power and confirm the contactor pulls in on a cooling call and drops out cleanly when satisfied.

Signs You Need a Replacement

Outdoor unit completely silent on a cooling call (no pull-in)
Buzzing, chattering, or humming from the contactor
Compressor won't shut off due to welded contacts
Visibly pitted, burned, or melted contact surfaces

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...

$34.00

Frequently Asked Questions

Does this Contactor fit my Tempstar T4H418GKA100 — 24V Coil w/Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar T4H418GKA100 — 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 T4H418GKA100 — 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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