What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCH448AKA1 — 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 TCH448AKA1 — 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 TCH448AKA1 — 24V Coil | Ships Today

Name: Tempstar 1-Pole 35A Contactor for TCH448AKA1 — 24V Coil | Ships Today
Brand: Tempstar
SKU: 1050839-GEN
Price: 32.95 USD
Availability: InStock

SKU: 1050839-GEN Brand: Tempstar

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Overview

This OEM single-pole 35-amp contactor (Tempstar part number 1050839) is the high-voltage switch that powers the compressor and outdoor fan on the TCH448AKA1 heat pump. When the thermostat calls for cooling or heating, the 24V coil pulls the contacts closed and sends line voltage to the compressor; when the call ends, the contacts open. Contactors are one of the most common failure points in outdoor units — the contacts pit, burn, and weld over thousands of cycles. A failing 35A contactor shows up as a unit that won't start, a chattering or humming sound, or contacts that stick closed so the compressor runs continuously. Replacing it with the correct OEM 1-pole, 24V-coil part restores clean, reliable switching.

Specifications

Spec	Value
Part Number	1050839
Type	1-Pole Contactor
Brand	Tempstar (ICP / Heil)
Rating	35 Amps
Coil Voltage	24V
Poles	1
Fitment	OEM

Compatibility

Built for the Tempstar TCH448AKA1 heat pump and used across ICP-family condensing units (Tempstar, Heil, Comfortmaker, ICP) calling for OEM part 1050839. Verify the amp rating, pole count, and 24V coil on your existing contactor before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the outdoor unit's service panel to expose the contactor.
Document — Photograph all line, load, and 24V coil wires before disconnecting.
Remove — Transfer wires one at a time, or label them, then unscrew the old contactor from its bracket.
Install — Mount the new 1-pole 35A contactor and reconnect each wire exactly per your photo.
Test — Restore power and confirm the contactor pulls in and the compressor/fan start on a thermostat call.

Signs You Need a Replacement

Outdoor unit won't start or hums without engaging
Loud chattering or buzzing from the contactor
Pitted, burnt, or welded contacts
Compressor runs nonstop because contacts are stuck 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 35A Contactor fo...

$32.95

Frequently Asked Questions

Does this Contactor fit my Tempstar TCH448AKA1 — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCH448AKA1 — 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 TCH448AKA1 — 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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