Hands-On Learning, Powering America Forward

Diagnosing and Replacing Contactors

 

Content Type icon

CONTENT TYPE

VR, ILV, Interactive Modules

Duration icon

DURATION

1 Hours

Target Audience icon

TARGET AUDIENCE

Technician

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COURSE DELIVERY

VR and Web-based

Credits icon

Credits : 0.1

Icons representing a four-step workflow: Learn, Assess, Evaluate, and Implement

 

About the Course:

This Diagnosing and Replacing Contactors microcredential trains HVAC technicians to safely diagnose, remove, and replace contactors in heating, ventilation, and air conditioning systems. Learners will practice identifying faulty contactors through visual inspection, electrical testing, and operational checks. The course also emphasizes correct replacement procedures, ensuring compatibility and reliable system performance.

Learning Objectives:

  • Identify common signs of contactor failure (pitting, welding, coil burnout).

  • Use multimeters and continuity tests to confirm contactor condition.
  • Follow safe lockout/tagout procedures before removal.
  • Select appropriate replacement contactors based on system specifications.
  • Install and test new contactors to verify proper system function.

Course delivered via LMS and requires an Oculus VR headset for hands-on VR simulations.

 

HVAC contactor diagnosis using a multimeter to test electrical continuity

 

Workforce Development

Technician inspecting an HVAC contactor for signs of wear and electrical failure

At ImmerseLearn, we prepare technicians to handle real-world electrical service tasks in HVAC systems. This microcredential emphasizes diagnostic accuracy, safe handling, and precise replacement.

How this course strengthens workforce skills:

Contactor Diagnostics −
Learn how to recognize electrical and mechanical wear issues through inspection and testing, reducing downtime caused by failed components.
Safe Removal Procedures +
Practice lockout/tagout steps and proper tool use for safe removal of faulty contactors.
Cause Identification +
Determine root causes of contactor failure, including overvoltage, overheating, or incorrect sizing.
Replacement and Verification +
Select correct contactors for system voltage and amperage, install them properly, and test circuits for restored operation.

By completing this microcredential, HVAC technicians will build the skills needed to troubleshoot, replace, and maintain contactors safely and effectively, ensuring system reliability. To advance your skills further, explore our HVAC Training Program for hands-on, job-ready expertise.