What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCA042AKC4 — Single Pole Definite Purpose | 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 TCA042AKC4 — Single Pole Definite Purpose | 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 1-Pole 35A 24V for TCA042AKC4 — Single Pole Definite Purpose | Ships Today

Name: Tempstar Contactor 1-Pole 35A 24V for TCA042AKC4 — Single Pole Definite Purpose | Ships Today
Brand: Tempstar
SKU: 1050839-GEN
Price: 24.95 USD
Availability: InStock

SKU: 1050839-GEN Brand: Tempstar

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This OEM single-pole definite purpose contactor (part 1050839) is the switching relay that energizes the compressor and condenser fan motor on your Tempstar TCA042AKC4 condensing unit. Rated for 35 amps with a 24V coil, it closes when the thermostat calls for cooling, delivering line voltage to the outdoor components. The contact points arc on every cycle and eventually pit, burn, or weld shut. Common failure symptoms include a unit that won't start, a buzzing or chattering outdoor unit, or a compressor that runs continuously because the contacts have fused closed.

Specifications

Spec	Value
Part Number	1050839
Type	Definite Purpose Contactor
Brand	Tempstar
Poles	1 (Single Pole)
Contact Rating	35 Amps
Coil Voltage	24V

Compatibility

Direct OEM replacement for the Tempstar TCA042AKC4 condensing unit. The 1050839 contactor is also shared across many ICP-family condensers (Heil, Comfortmaker, Carrier, Bryant) using the same control circuit. Verify your existing contactor's amp and coil-voltage rating before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter at the contactor terminals.
Access — Remove the condensing unit's service panel to expose the control area.
Document — Photograph all wiring before disconnecting anything.
Remove — Note line, load, and 24V coil terminal positions, then transfer wires one at a time to the new contactor and unscrew the old unit from its mount.
Install — Mount the new contactor and reconnect every wire exactly per your photo.
Test — Restore power, call for cooling, and confirm the contactor pulls in and the unit starts cleanly.

Signs You Need a Replacement

Outdoor unit buzzes or hums but the compressor/fan won't start.
Visibly pitted, burned, or melted contact points.
Compressor runs nonstop because the contacts have welded closed.
Chattering or rapid clicking when the thermostat calls for cooling.

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 Contactor 1-Pole 35A 24...

$24.95

Frequently Asked Questions

Does this Contactor fit my Tempstar TCA042AKC4 — Single Pole Definite Purpose | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCA042AKC4 — Single Pole Definite Purpose | 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 TCA042AKC4 — Single Pole Definite Purpose | 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.

Menu