What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCA042AKB1 — 35A 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 TCA042AKB1 — 35A 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 Contactor for TCA042AKB1 — 35A 24V Coil | Ships Today

Name: Tempstar 1-Pole Contactor for TCA042AKB1 — 35A 24V Coil | Ships Today
Brand: Tempstar
SKU: 1050839-GEN
Price: 42.95 USD
Availability: InStock

SKU: 1050839-GEN Brand: Tempstar

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Overview

This is a genuine OEM single-pole definite purpose contactor (Part #1050839) for the Tempstar TCA042AKB1 condensing unit. The contactor is the electrically operated switch that energizes the compressor and outdoor condenser fan motor whenever the thermostat calls for cooling. Rated at 35 amps with a 24-volt control coil, it carries the high-voltage load to the compressor while being safely switched by the low-voltage thermostat circuit. When a contactor fails, the most common symptoms are a unit that won't start, buzzing or chattering at the contactor, pitted or welded contacts that keep the compressor running continuously, or burnt terminals. Replacing a worn contactor is one of the most common and cost-effective HVAC repairs.

Specifications

Spec	Value
Part Number	1050839
Type	Single-Pole (1P) Contactor
Brand	Tempstar
Current Rating	35 Amps
Coil Voltage	24V
Poles	1
Fit	OEM Replacement

Compatibility

Engineered as a direct-fit replacement for the Tempstar TCA042AKB1 air conditioner / heat pump condensing unit. This 1-pole 35A 24V contactor is also used across many ICP-family outdoor units (Tempstar, Heil, Comfortmaker) that share the same electrical platform. Always confirm the printed part number 1050839 against your existing contactor before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter before touching any wiring.
Access — Remove the condenser service/access panel to expose the contactor.
Document — Photograph all wire positions on the line, load, and 24V coil terminals before disconnecting anything.
Remove — Label and disconnect the high-voltage line/load wires and the two 24V coil wires, then unscrew the old contactor from its mounting bracket.
Install — Mount the new contactor and reconnect every wire exactly as photographed, ensuring tight terminal connections.
Test — Restore power, call for cooling, and confirm the contactor pulls in cleanly and the compressor/fan energize without buzzing.

Signs You Need a Replacement

Outdoor unit hums or buzzes but the compressor won't start.
Visibly pitted, burnt, or welded contacts.
Compressor runs nonstop because contacts are stuck closed.
Chattering or intermittent cooling caused by a weak coil.

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 Contactor for TC...

$42.95

Frequently Asked Questions

Does this Contactor fit my Tempstar TCA042AKB1 — 35A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCA042AKB1 — 35A 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 TCA042AKB1 — 35A 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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