What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCA018AKA5 — 24V Coil | 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 TCA018AKA5 — 24V Coil | 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 25A Contactor for TCA018AKA5 — 24V Coil | Ships Today

Name: Tempstar 1-Pole 25A Contactor for TCA018AKA5 — 24V Coil | Ships Today
Brand: Tempstar
SKU: 1050699-GEN
Price: 26.95 USD
Availability: InStock

SKU: 1050699-GEN Brand: Tempstar

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Overview

This genuine OEM single-pole definite-purpose contactor (part number 1050699) is the switching relay for the Tempstar TCA018AKA5 condensing unit. Rated at 25 amps with a 24-volt control coil, it energizes the compressor and condenser fan motor whenever the thermostat calls for cooling. The 24V coil pulls the contacts closed to pass line voltage to the compressor, then releases them when cooling demand ends. Because the contacts arc each time the unit cycles, contactors are a wear item that eventually pits, burns, or welds. A failing contactor is among the most common causes of an outdoor unit that won't start, won't stop, or buzzes loudly.

Specifications

Spec	Value
Part Number	1050699
Description	Contactor 1P 25A 24V
Type	Single-pole (1-pole) definite purpose
Contact Rating	25 Amps
Coil Voltage	24 VAC
Poles	1
Brand	Tempstar (ICP / Heil)
Fitment	OEM direct replacement

Compatibility

Engineered for the Tempstar TCA018AKA5 air conditioning condensing unit and the broader ICP/Heil/Comfortmaker family that uses a 1-pole 25A 24V contactor. This part also fits the closely related TCA018AKC4, TCA018AKC3, and TCA018AKB1 revisions. Verify your existing contactor is single-pole with a 24V coil before ordering.

Installation Guide

Safety First — Shut off power at the outdoor disconnect and confirm zero voltage with a multimeter across the line terminals.
Access — Remove the service panel on the condensing unit to expose the control box.
Document — Photograph every wire on the contactor (line, load, and 24V coil) before disconnecting.
Remove — Label and pull the spade connectors, unscrew the old contactor from the bracket, and set it aside.
Install — Mount the new 1050699 contactor, then transfer each wire to the matching terminal per your photo.
Test — Restore power and call for cooling. Confirm the contactor pulls in cleanly and the compressor and fan start without chatter.

Signs You Need a Replacement

Outdoor unit won't start even though the thermostat calls for cooling
Loud buzzing, humming, or chattering from the contactor
Pitted, burned, or welded contacts visible on inspection
Compressor won't shut off because contacts have fused closed

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 1-Pole 25A Contactor fo...

$26.95

Frequently Asked Questions

Does this Contactor fit my Tempstar TCA018AKA5 — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCA018AKA5 — 24V Coil | 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 TCA018AKA5 — 24V Coil | 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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