What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCA448AKA1 — 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 TCA448AKA1 — 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 TCA448AKA1 — 35A 24V Coil | Ships Today

Name: Tempstar 1-Pole Contactor for TCA448AKA1 — 35A 24V Coil | Ships Today
Brand: Tempstar
SKU: 1050839-GEN
Price: 27.95 USD
Availability: InStock

SKU: 1050839-GEN Brand: Tempstar

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Overview

This OEM single-pole definite purpose contactor (part #1050839) is the switching relay that powers your Tempstar TCA448AKA1 condensing unit. Rated at 35 amps with a 24-volt coil, the contactor uses a low-voltage signal from the thermostat to energize the 24V coil, which pulls in the contacts and sends line voltage to the compressor and condenser fan motor. It is one of the most failure-prone parts in an outdoor unit because the contacts arc and pit with every cycle. Common failure symptoms include a humming or chattering outdoor unit, an AC that will not start, pitted or welded contacts, or a unit that runs continuously because the contacts have fused closed. Replacing a worn contactor is a fast, inexpensive repair that restores reliable starting.

Specifications

Spec	Value
Part Number	1050839
Type	Single-Pole (1P) Definite Purpose Contactor
Brand	Tempstar
Contact Rating	35 Amps
Coil Voltage	24 VAC
Poles	1
Fitment	OEM Replacement

Compatibility

Engineered as a direct OEM replacement for the Tempstar TCA448AKA1 air conditioner and related ICP/Heil/Comfortmaker platform condensing units that use the 1050839 contactor. Always confirm your existing contactor is single-pole with a 24V coil and a 35A contact rating before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter across the line terminals.
Access — Remove the service panel from the condensing unit to expose the electrical compartment.
Document — Photograph all wire positions on the old contactor before disconnecting anything.
Remove — Label and disconnect the line, load, and 24V coil wires, then unscrew the old contactor from its mounting bracket.
Install — Mount the new 1050839 contactor and reconnect each wire to the matching terminal per your photo.
Test — Restore power and confirm the contactor pulls in cleanly with no chatter and the unit starts normally.

Signs You Need a Replacement

Loud humming, buzzing, or chattering from the outdoor unit
Air conditioner will not start even though the thermostat is calling for cooling
Visibly pitted, burned, or melted contacts
Outdoor unit runs nonstop because the contacts are welded closed

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...

$27.95

Frequently Asked Questions

Does this Contactor fit my Tempstar TCA448AKA1 — 35A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCA448AKA1 — 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 TCA448AKA1 — 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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