What amp contactor do I need for my Tempstar system?

The correct replacement for Tempstar model TCH042AKA1 — 1-Pole 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 TCH042AKA1 — 1-Pole 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 Contactor for TCH042AKA1 — 1-Pole 35A 24V Coil | Ships Today

Name: Tempstar Contactor for TCH042AKA1 — 1-Pole 35A 24V Coil | Ships Today
Brand: Tempstar
SKU: 1050839-GEN
Price: 24.95 USD
Availability: InStock

SKU: 1050839-GEN Brand: Tempstar

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Overview

This is a genuine OEM single-pole definite purpose contactor (part #1050839) for the Tempstar TCH042AKA1 heat pump. The contactor acts as the electrically controlled switch that powers the compressor and condenser fan motor whenever the thermostat calls for operation. A 24-volt control signal energizes the magnetic coil, which closes a 35-amp line-voltage contact to feed the outdoor unit. With thousands of cycles per cooling season, the contacts gradually pit, arc, and can weld shut. Watch for a unit that hums but won't start, a buzzing or chattering noise at the disconnect, contacts stuck closed so the compressor runs continuously, or scorched terminals. Swapping the contactor is a quick, affordable repair that restores reliable starting.

Specifications

Spec	Value
Part Number	1050839
Type	Definite Purpose Contactor, 1-Pole
Brand	Tempstar (ICP / Heil)
Contact Rating	35 Amps
Coil Voltage	24 VAC
Poles	1
Fits Model	TCH042AKA1

Compatibility

Engineered as a direct-fit replacement for the Tempstar TCH042AKA1 condensing unit. It also fits many ICP-family outdoor units — Heil, Comfortmaker, Arcoaire, and Keeprite — that originally used a 1-pole 35A 24V contactor. Verify pole count, amp rating, and coil voltage against your existing part before installing.

Installation Guide

Safety First — Disconnect power at the 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 contactor.
Document — Photograph every wire and terminal before disconnecting anything.
Remove — Label and disconnect the line, load, and 24V coil wires, then unbolt the old contactor.
Install — Mount the new contactor and reconnect each wire exactly as photographed.
Test — Restore power, call for cooling, and confirm the contactor pulls in cleanly with the compressor and fan energizing.

Signs You Need a Replacement

Outdoor unit hums or buzzes but the compressor won't start
Contacts pitted, burnt, or welded closed (unit runs nonstop)
Visible arcing or melted terminals
Intermittent cooling or short-cycling

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 for TCH042AKA...

$24.95

Frequently Asked Questions

Does this Contactor fit my Tempstar TCH042AKA1 — 1-Pole 35A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the Tempstar TCH042AKA1 — 1-Pole 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 TCH042AKA1 — 1-Pole 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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