Hands-On Learning, Powering America Forward

Diagnosing and Replacing Sequencers

 

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 microcredential trains HVAC technicians to accurately diagnose and replace sequencers in electric heating systems. Learners will identify wiring errors, recognize common failure modes such as shorted coils or faulty contacts, and practice replacing sequencers with the correct specifications. The course emphasizes safe electrical practices, manufacturer compliance, and reliable system restoration.

Learning Objectives:

  • Diagnose faulty sequencers by testing coils and contact operation.

  • Identify wiring configurations and verify correct connections.
  • Recognize common failure modes such as shorted coils, contacts not closing, or contacts not opening.
  • Replace sequencers with models of the same current rating and manufacturer specifications.
  • Test system operation after installation to confirm heating sequence integrity.

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

 

Learn HVAC contactor diagnosis and replacement for safe system performance

 

Workforce Development

Safe HVAC contactor replacement and troubleshooting to ensure system efficiency

At ImmerseLearn, we train HVAC technicians to troubleshoot and repair critical electrical components in heating systems with precision and safety. This microcredential provides practical training in sequencer diagnostics and replacement.

How this course strengthens workforce skills:

Sequencer Diagnostics −
Learn to test coil resistance and contact continuity, identifying electrical failures and sequence timing issues.
Wiring Verification +
Practice verifying and labeling wiring connections to ensure correct installation and avoid miswiring errors.
Failure Mode Identification +
Understand how to detect shorted coils, stuck-open contacts, and contacts that fail to close.
Replacement and System Testing +
Develop the ability to select the correct sequencer by current rating, install it safely, and confirm proper heating operation after replacement.

By completing this microcredential, HVAC technicians will build the skills needed to troubleshoot, replace, and maintain contactors safely and effectively, ensuring system reliability. Learn more in our HVAC Training Course to gain real-world HVAC skills.