What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCA748GKA200 — 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 TCA748GKA200 — 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 1-Pole Contactor for TCA748GKA200 — 30A 24V w/Shunt | Ships Today

Name: Tempstar 1-Pole Contactor for TCA748GKA200 — 30A 24V w/Shunt | Ships Today
Brand: Tempstar
SKU: 1172472-GEN
Price: 26.95 USD
Availability: InStock

SKU: 1172472-GEN Brand: Tempstar

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Overview

This genuine OEM 1-pole, 30 amp contactor with shunt (part number 1172472) is the line-voltage switch that energizes the compressor and condenser fan on the Tempstar TCA748GKA200. When the thermostat calls for cooling, a 24-volt signal pulls in the coil and the single-pole contact closes to deliver power, while the built-in shunt maintains the parked/return path on the unswitched leg. After tens of thousands of cycles the contact point burns, pits, or welds, and the coil can open. Symptoms include a unit that hums but won't start, a compressor that runs nonstop from welded contacts, chattering or buzzing, and burnt or pitted terminals. Replacing the worn 1-pole 30A contactor restores clean, reliable switching and protects the compressor from voltage-related damage.

Specifications

Spec	Value
Part Number	1172472
Type	1-Pole Definite Purpose, w/Shunt
Brand	Tempstar (ICP/Heil)
Contact Rating	30 Amps
Poles	1
Coil Voltage	24 VAC
Fits Model	TCA748GKA200

Compatibility

Built as the factory replacement for the Tempstar TCA748GKA200 condenser. This 1-pole 30A 24V contactor with shunt also fits matching ICP, Heil, and Comfortmaker condensing units on the same platform. Confirm the pole count, amp rating, 24V coil, and shunt configuration against your original before installing.

Installation Guide

Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage at the contactor with a multimeter.
Access — Remove the condenser service panel to reach the control compartment.
Document — Photograph every line, load, and 24V coil connection before disconnecting.
Remove — Label and disconnect the leads, then unscrew the old contactor from the bracket.
Install — Mount the new 1-pole contactor and reconnect each wire exactly per your photo, keeping the shunt leg correct.
Test — Restore power, call for cooling, and confirm the contactor pulls in and the compressor and fan run.

Signs You Need a Replacement

Unit hums or buzzes but won't start.
Compressor runs continuously from welded contacts.
Pitted, burnt, or melted contactor terminals.
Chattering coil or intermittent cooling.

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day hassle-free 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 Contactor for TC...

$26.95

Frequently Asked Questions

Does this Contactor fit my Tempstar TCA748GKA200 — 30A 24V w/Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCA748GKA200 — 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 TCA748GKA200 — 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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