Electric Range Common Failures, Bake Element, Broil Element, and Cooktop Element Resistances This online electronics cheat-sheet contains commonly needed electrical/electronics information for Electric Ranges. *CLICK HERE TO DONATE* Oven Sensor Resistance Chart Power Input Issues and Commons Symptoms Missing or weak L1 Missing or weak L2 Missing, weak, or floating Neutral Reversed L1 and Neutral […]
How to test Different Types of Diodes Testing diodes is primarily a matter of checking the forward and reverse bias voltages. LEDs have a higher forward bias than most diodes. The high-powered ones used for lighting usually cannot be tested with the diode check function on your meter nor with a simple resistance check. The […]
Loss of a 240v Voltage Leg of an Electric Dryer What happens when a loose connection at the junction box or terminal block on an electric dryer causes one of your line voltages to drop out? Here are the equivalent circuits and how to test for this loss. Figure 1 is a simplified equivalent circuit […]
How Linear and Switching Power Supplies Work Linear and Switching Power Supplies (SMPS – switched mode power supply) are the two primary types of supplies found in Appliances, Televisions, and HVAC units., The respective design and operation of Linear vs. Switching Power Supplies is quite different. Figure 1 shows an actual linear power supply for […]
Intro – Resistor Voltages and Currents – The Basics Reading schematics can sometimes be confusing for Appliance and HVAC technicians. Particularly determining voltages across or current through components. These voltages and currents are well defined by Ohm’s Law though. No matter how a network of components are arranged in a circuit, there is a formula […]
What Does Line Voltage Look Like? Appliance and HVAC technicians frequently deal with residential line voltage. Failures in appliances and HVAC systems are sometimes caused by mis-wired, loose, or disconnected components. Understanding the behavior of voltages when they are missing or mis-wired can aid in troubleshooting. A 60Hz, 120V RMS voltage is determined by multiplying […]
Intro to Reading Schematics – A Basic Whirlpool Electric Dryer This article will schematically show where voltages appear in a Whirlpool Dryer circuit for different operating modes and failure states. This information can be useful to technicians that want to use voltage checks in addition to their other troubleshooting methods. Please note that this article […]