What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCH448AKA3 — 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 TCH448AKA3 — 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 TCH448AKA3 — 35A 24V Coil | Ships Today

Name: Tempstar 1-Pole Contactor for TCH448AKA3 — 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 is a genuine OEM single-pole definite purpose contactor (part number 1050839) for the Tempstar TCH448AKA3 heat pump. The contactor is the electrically operated switch that energizes the compressor and condenser fan motor whenever the thermostat calls for cooling or heating. When the 24-volt control coil is energized, the contacts close and pass line voltage to the outdoor unit. Rated for 35 amps with a 24V coil, this 1-pole contactor is one of the most common failure points in any outdoor condensing unit. Symptoms of a failing contactor include a unit that will not start, chattering or buzzing at the outdoor unit, pitted or welded contacts, and a humming compressor that never engages.

Specifications

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

Compatibility

Engineered as a direct-fit replacement for the Tempstar TCH448AKA3 heat pump. This contactor is also used across many ICP-family outdoor units, including Heil, Comfortmaker, and other Tempstar models that share the 35A / 24V single-pole platform. Always confirm the part number on your existing contactor before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect box and breaker, then verify zero voltage with a multimeter.
Access — Remove the outdoor unit service panel.
Document — Photograph all wires before disconnecting anything.
Remove — Note line, load, and 24V coil terminal positions, then transfer wires one at a time off the old contactor and unbolt it from the bracket.
Install — Mount the new contactor and reconnect each wire to the matching terminal per your photo.
Test — Restore power and confirm the contacts pull in and the compressor and fan start on a cooling call.

Signs You Need a Replacement

Outdoor unit hums or buzzes but the compressor never starts.
Visible pitting, burning, or welded-together contacts.
Unit randomly fails to start on a thermostat call.
Chattering noise from the contactor when energized.

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 TCH448AKA3 — 35A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCH448AKA3 — 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 TCH448AKA3 — 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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