What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCA448AKB1 — 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 TCA448AKB1 — 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 35A Contactor for TCA448AKB1 — 24V Coil | Ships Today

Name: Tempstar 1-Pole 35A Contactor for TCA448AKB1 — 24V Coil | Ships Today
Brand: Tempstar
SKU: 1050839-GEN
Price: 29.95 USD
Availability: InStock

SKU: 1050839-GEN Brand: Tempstar

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Overview

This is the genuine OEM single-pole contactor (part number 1050839) for the Tempstar TCA448AKB1 condensing unit. Rated at 35 amps with a 24-volt control coil, this contactor is the electromechanical switch that energizes the compressor and condenser fan motor whenever the thermostat calls for cooling. When the 24V coil is energized, the armature pulls in and closes the high-voltage line to the compressor; when the call ends, the contactor drops out and opens the circuit. Because the contacts arc and pit on every cooling cycle, contactors are one of the most common AC failure points — over time they burn, weld, or chatter. Typical symptoms include a buzzing outdoor unit, a compressor that won't start, or a system that won't shut off due to welded contacts. Replacing a worn contactor early protects the costly compressor from damaging low-voltage operation.

Specifications

Spec	Value
Part Number	1050839
Type	Single-Pole (1P) Definite Purpose Contactor
Brand	Tempstar (ICP / Heil)
Rating	35 Amps
Coil Voltage	24 VAC
Poles	1

Compatibility

Designed for the Tempstar TCA448AKB1 condensing unit and other ICP/Heil/Comfortmaker air conditioners using a 1-pole 35A 24V definite purpose contactor. Verify pole count, amperage, and coil voltage against your existing part before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
Access — Remove the service panel to expose the contactor.
Document — Photograph every wire on the line, load, and coil terminals before disconnecting.
Remove — Label or transfer wires one at a time, then unscrew the old contactor from its mount.
Install — Mount the new contactor and reconnect each wire to the matching terminal per your photo.
Test — Restore power and confirm the contactor pulls in cleanly and the compressor and fan start.

Signs You Need a Replacement

Loud buzzing or humming from the outdoor unit
Pitted, burned, or welded contacts
Compressor fails to start on a cooling call
Unit won't shut off when the thermostat is satisfied

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 35A Contactor fo...

$29.95

Frequently Asked Questions

Does this Contactor fit my Tempstar TCA448AKB1 — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCA448AKB1 — 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 TCA448AKB1 — 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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