Microwaves |

About Course

Respect the Voltage. Master the Repair.

Microwaves are the most dangerous appliance in the home if mishandled, but they are also one of the most profitable to repair.

This course moves beyond guesswork to cover High-Voltage Heating Circuits, complex Door Interlock Logic, and safe discharge procedures. You will learn to diagnose failures accurately without risking your safety.

Technical Skills You Will Master:

⚡ High Voltage Circuit

Components: Magnetrons, HV Capacitors, Diodes, and Transformers.
Testing: How to test a magnetron for shorts and open filaments.
Safety: Proper capacitor discharge techniques.

🔒 Door Logic & Controls

Interlock Switches: The #1 cause of microwave failure (and blown breakers).
Smart Boards: Troubleshooting control voltage and relays.
Video Tutorials: Visual guides on latch adjustment.

🎥

Video-Heavy Curriculum

We know you need to see it to understand it. This course includes in-depth video tutorials supplementing the text, showing you exactly how to place your meter leads safely.

Already a Student?

This entire course is INCLUDED FOR FREE in the
ATA Certified Professional Program.

(If you are enrolled in the Pro program, you do not need to buy this separately.)

Course Content

Introduction
In this module, we discuss what we will be learning and will introduce you to diagrams and theories that you will be exploring during the course.

Introduction to Microwaves

08:46
Using the Diagram

00:00
Diagnostic Process

Interlocks
In this section, we dive into interlock switches and the role they play.

High Voltage (HV) Circuits
In this module, we're going to dive into the voltage that kicks the high voltage components into action.

Control Board Power
In this module, let's look at how the control board is able to stay on regardless of the door position.

Magnetron Operations
In this topic, we discuss the magnetron and its operations.

Theory of Operations
In this final section, we finally discuss the overall theory of operations and discuss a few of the complaints you might see in the field, especially if you're servicing brand new appliances.

Student Ratings & Reviews

No Review Yet

Microwaves

About Course

Respect the Voltage. Master the Repair.

Technical Skills You Will Master:

Course Content

Introduction
In this module, we discuss what we will be learning and will introduce you to diagrams and theories that you will be exploring during the course.

Introduction to Microwaves

Using the Diagram

Diagnostic Process

Interlocks
In this section, we dive into interlock switches and the role they play.

Interlock Switches

Door Circuits

High Voltage (HV) Circuits
In this module, we're going to dive into the voltage that kicks the high voltage components into action.

High Voltage Circuit

Voltage Refresher

Conventional High Voltage Configuration

4903 – Heat Relay

Diagnostic Video

Control Board Power
In this module, let's look at how the control board is able to stay on regardless of the door position.

Control Board Power

Series Circuit Refresher

Magnetron Operations
In this topic, we discuss the magnetron and its operations.

Transformer

Cap, Diode and Voltage

The Magnetron

Testing Components

Theory of Operations
In this final section, we finally discuss the overall theory of operations and discuss a few of the complaints you might see in the field, especially if you're servicing brand new appliances.

Theory of Operations

About Course

Respect the Voltage. Master the Repair.

Technical Skills You Will Master:

Course Content

Introduction In this module, we discuss what we will be learning and will introduce you to diagrams and theories that you will be exploring during the course.

Introduction to Microwaves

Using the Diagram

Diagnostic Process

Interlocks In this section, we dive into interlock switches and the role they play.

Interlock Switches

Door Circuits

High Voltage (HV) Circuits In this module, we're going to dive into the voltage that kicks the high voltage components into action.

High Voltage Circuit

Voltage Refresher

Conventional High Voltage Configuration

4903 – Heat Relay

Diagnostic Video

Control Board Power In this module, let's look at how the control board is able to stay on regardless of the door position.

Control Board Power

Series Circuit Refresher

Magnetron Operations In this topic, we discuss the magnetron and its operations.

Transformer

Cap, Diode and Voltage

The Magnetron

Testing Components

Theory of Operations In this final section, we finally discuss the overall theory of operations and discuss a few of the complaints you might see in the field, especially if you're servicing brand new appliances.

Theory of Operations

Student Ratings & Reviews

Introduction
In this module, we discuss what we will be learning and will introduce you to diagrams and theories that you will be exploring during the course.

Interlocks
In this section, we dive into interlock switches and the role they play.

High Voltage (HV) Circuits
In this module, we're going to dive into the voltage that kicks the high voltage components into action.

Control Board Power
In this module, let's look at how the control board is able to stay on regardless of the door position.

Magnetron Operations
In this topic, we discuss the magnetron and its operations.

Theory of Operations
In this final section, we finally discuss the overall theory of operations and discuss a few of the complaints you might see in the field, especially if you're servicing brand new appliances.