What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model T4A418GKA100 – 1-Pole 30A 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 T4A418GKA100 – 1-Pole 30A 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 Contactor for T4A418GKA100 – 1-Pole 30A 24V w/ Shunt | Ships Today

Name: Tempstar Contactor for T4A418GKA100 – 1-Pole 30A 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 is a genuine OEM single-pole contactor (part number 1172472) for the Tempstar T4A418GKA100 condensing unit. It is a 1-pole, 30-amp contactor with a 24-volt control coil and an integrated auxiliary shunt. The contactor acts as the main high-voltage switch for the outdoor unit: when the thermostat calls for cooling, the 24V coil energizes and closes the contacts, feeding line voltage to the compressor and condenser fan. A failed contactor is the single most common reason an outdoor unit goes completely dead while the indoor system still appears to function. Typical failures include pitted or welded contacts from arcing, an open or weak coil, audible chatter, or ants and debris that prevent the contacts from closing cleanly.

Specifications

Spec	Value
OEM Part Number	1172472
Type	Definite Purpose Contactor, with shunt
Brand	Tempstar
Poles	1 (Single-Pole)
Contact Rating	30 Amps
Coil Voltage	24 VAC
Fits Model	T4A418GKA100

Compatibility

This is the factory-specified contactor for the Tempstar T4A418GKA100 air conditioner and many other ICP-family (Tempstar, Heil, Comfortmaker) units that call out OEM part 1172472. Verify the number stamped on your current contactor before ordering.

Installation Guide

Safety First – Disconnect power at the outdoor disconnect and breaker, then confirm zero voltage with a multimeter.
Access – Remove the condenser service panel to reach the control box.
Document – Take a clear photo of every wire before disconnecting.
Remove – Slide the line, load, and coil wires off the terminals and unbolt the old contactor.
Install – Mount the replacement, reconnect each lead exactly as photographed, including the shunt.
Test – Restore power and verify the contactor pulls in and the unit starts on a cooling call.

Signs You Need a Replacement

Condenser stays off while the thermostat calls for cool.
Humming or buzzing with no compressor start.
Burned, pitted, or welded contact surfaces.
Contactor chatters or only partially closes.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. 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 Contactor for T4A418GKA...

$32.00

Frequently Asked Questions

Does this Contactor fit my Tempstar T4A418GKA100 – 1-Pole 30A 24V w/ Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar T4A418GKA100 – 1-Pole 30A 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 T4A418GKA100 – 1-Pole 30A 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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