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Carrier Factory Authorized Parts HK35AC002 OEM Phase Monitor Relay – Three-Phase HVAC Equipment Protection Control

Carrier Factory Authorized Parts HK35AC002 OEM Phase Monitor Relay – Three-Phase HVAC Equipment Protection Control

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Factory replacement part number BRD04939

  • Trane BRD04939 OEM Electronic Circuit Board

  • Trane / American Standard OEM replacement component

  • Electronic circuit board for compatible HVAC equipment

  • Equipment-specific factory replacement application

  • Designed for compatible HVAC electrical control systems

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Specifications

Key Features & Function

  • Brand:
    Trane / American Standard
  • Part
    Number: BRD04939
  • OEM
    electronic circuit board
  • Equipment-specific
    replacement component
  • Designed
    for compatible HVAC electrical systems
  • Supports
    the equipment's assigned electronic control functions
  • Factory
    replacement part identification
  • Intended
    for professional HVAC service and repair

 

description

The Factory Authorized Parts™ HK35AC002 is an OEM phase monitor relay designed for compatible Carrier HVAC equipment. This electrical control component monitors three-phase power conditions and helps protect equipment against improper phase conditions that could affect motor and compressor operation.

The HK35AC002 phase monitor relay is used in HVAC systems requiring phase monitoring as part of their electrical protection and control sequence. Proper phase monitoring helps reduce the risk of equipment damage caused by conditions such as phase loss, phase reversal, or voltage imbalance, depending on the relay's specific protective functions.

Designed for professional HVAC maintenance and repair, this factory replacement component is intended for equipment specifically requiring Carrier part number HK35AC002.

Key Features & Function

  • Brand: Carrier Factory Authorized Parts™
  • Part Number: HK35AC002
  • OEM phase monitor relay
  • Designed for compatible three-phase HVAC equipment
  • Monitors incoming electrical phase conditions
  • Supports HVAC electrical protection and control functions
  • Helps protect connected motors and compressors when integrated into the equipment's safety circuit
  • Equipment-specific replacement component
  • Designed for compatible commercial HVAC applications
  • Factory Authorized Parts replacement identification

Product Details & Key Specifications

Specification

Details

Brand

Carrier / Factory Authorized Parts

Manufacturer Part Number

HK35AC002

Product Type

Phase Monitor Relay

Common Name

Phase Monitoring Relay / Phase Protection Relay

Electrical Application

Three-Phase Power Monitoring

Primary Function

Electrical Phase Condition Monitoring

Equipment Application

Compatible HVAC Equipment

Phase Loss Protection

Verify manufacturer specifications

Phase Reversal Protection

Verify manufacturer specifications

Voltage Imbalance Protection

Verify manufacturer specifications

Operating Voltage Range

Verify manufacturer specifications

Output Contact Rating

Verify manufacturer specifications

Trip / Reset Characteristics

Verify manufacturer specifications

Mounting Configuration

Verify original relay

Replacement Type

OEM Service Component

Installation

Qualified HVAC Technician / Electrician

🛠️ HVAC Depot Pro Tip

When replacing the Carrier HK35AC002, verify the exact OEM part number and electrical specifications before ordering.

Part Number: HK35AC002

Component: Phase Monitor Relay

Application: Three-Phase HVAC Electrical Protection

A phase monitor relay is not interchangeable with every other three-phase protection relay. Different models may have different voltage ranges, sensing functions, output contact configurations, and reset requirements.

Before replacing the relay, verify the incoming supply voltage, phase sequence, equipment wiring, and manufacturer-approved control requirements.

Important: The exact operating voltage, supported protection functions, and trip thresholds for HK35AC002 have not been independently confirmed. These should be verified against the manufacturer's technical documentation before publishing more specific electrical claims.

Electrical testing and installation should be performed by qualified personnel following appropriate lockout/tagout procedures.

Equipment / Model Compatibility

The Carrier Factory Authorized Parts HK35AC002 is intended for compatible HVAC equipment specifically requiring this OEM phase monitor relay.

Potential applications include:

  • Compatible Carrier commercial HVAC equipment
  • Select three-phase air-conditioning systems
  • Select commercial rooftop HVAC units
  • Three-phase equipment requiring HK35AC002

Before ordering, confirm the complete equipment model number, serial number, original phase monitor identification, electrical supply voltage, and control wiring configuration.

Compatibility Note: Exact equipment model numbers and electrical operating specifications have not been independently confirmed.

 

Specification

Refund policy

Refund & Return Policy

Last Updated: June 2026

At HVAC Parts & Equipment Depot, customer satisfaction is important to us. This Refund & Return Policy explains how returns, exchanges, and refunds are handled for purchases made through TopHVACParts.com.

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

  • The item must be unused, uninstalled, and in its original condition.
  • The item must be returned in its original packaging.
  • Model numbers and serial numbers must match the original purchase records.
  • Proof of purchase or order confirmation is required.

Non-Returnable Items

The following items are not eligible for return or refund:

  • Installed or used parts.
  • Products showing signs of installation, modification, or damage caused after delivery.
  • Items missing original packaging.
  • Sale or clearance items.
  • Special-order or custom-order products.
  • Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

support@tophvacparts.com

Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

  • Refunds will be issued to the original payment method.
  • Processing typically takes 7–14 business days after approval.
  • Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

  • Our shipping error,
  • A defective product,
  • A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.

Celest G.
Verified Customer
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