FAQs | Repair Videos | Academy | Newsletter | Contact
Stay connected with us...
Entries in this blog
We drop a lot of pearls of wisdom in our live technical training webinars, and I wanted to make one particular pearl available to all. In this short excerpt from one of our many webinar recordings, we cover what you need to know about electricity and voltage in order to make a meaningful and useful voltage measurement -- all in the context of a real troubleshooting scenario.
Topics covered include:
What is voltage?
How do you choose a voltage reference?
What is LoZ?
We've got a tricky one for you today: a Frigidaire-built Kenmore electric dryer that only runs on heat cycles. If you set it to a timed or auto dry, it runs just fine. But set it to air fluff, and you get nada -- no motor rotation, no nothin'. Sounds like a bad timer, right? That was our first thought, too. But like any good tech should, we covered all of our bases before jumping to conclusions, and what we found was much more interesting...
We'll start by analyzing the circuit of the motor
When you see a term like "FlowSense" in a service manual, don't immediately assume that you're dealing with some bizarre, new technology. 99% of the time, it's just a fancy brand name that the manufacturer slapped on a bit of simple tech that's been around for decades.
And that's what you're going to see in this video! in it, we show how "FlowSense" is just a fancy name for a single sensing line on the control board that detects the presence or absence of L2. Watch it now to learn exactly
Here's a GE microwave schematic. There's a lot of typical microwave stuff going on here, but we're going to focus in on one component today: the monitor switch.
What exactly is this switch's purpose, and how does it affect the circuit?
The purpose of the monitor switch is to act as a safety to prevent the magnetron from being energized while the door is open. The door latch and switches in microwaves are designed so that, if everything is working correctly, the monitor switch sho
Many techs are intimidated when they first look at a schematic -- but you don't have to be! You can make sense of any schematic, even one with multiple control boards, by following some simple troubleshooting principles. And that's what we're going to show you in this short clip from one of our many technical training webinar recordings.
In it, we'll use a real-world tech sheet to demonstrate some of these principles, such as:
Identifying the control boards
Identifying the b
What do you do when you need to grow your team of appliance techs in order to meet the demand for service calls, but you can't find any job candidates with experience? This is the reality for thousands of companies across the country, since very few quality techs with experience are on the job market. You're in luck: with the training options available today, you can build a tech! Hire based on character and aptitude, then add training and some experience, and you'll have an independent applianc
More and more folks are doing online training webinars these days -- so many, in fact, that it can be impossible to keep up with them all. Recently, Samsung and MSA both put out training webinars on Samsung dishwasher technology and troubleshooting, and I figured I would share the love with the Appliantology Brethren.
In the links below, you'll find my notes and screenshots from both webinars. Topics include:
Troubleshooting the OC/OE error
Identifying common sources of leaks
If a dryer's motor isn't running, and you hear a strange humming noise coming from the start switch, what does that mean for the switch? And if you want to test that switch, what's the best way to do that?
These are questions that we answer right here in this short excerpt from one of our many in-depth technical training webinar recordings. Give it a watch and learn the answers for yourself...
Want to watch the full webinar recording? Click below -- viewable only by premium m
Here's your scenario: you're working on a Whirlpool CAM2742TQ2 Washer, and you've determined that the auto temp control (ATC) has failed such that it won't energize the water valves and allow the machine to fill. You intend to replace the ATC, but it's on backorder. Is there any clever trick you can think of that will at least get the customer going temporarily while they wait?
Time to crack out the schematic.
It looks like there's a lot going on here, what with all those alphabe
How you go about your troubleshooting makes all the difference between whether you're a Parts-Changing Monkey or a real appliance repair technician. While parts-changers rely on pattern recognition and rote memorization of "if this problem, then that part", a real tech uses analytical troubleshooting techniques and understanding of the technology involved to get to the right problem every time.
That's exactly what this excerpt from one of our technical training webinar recordings demonstrat
We encounter diodes in a variety of situations, such as in certain refrigerator water valve configurations. If you want to be able to properly troubleshoot these setups, you need to understand the underlying technology of diodes. How doe they affect the circuit around them? And how do you test them?
These are the questions that we answer for you in this short video introduction to diodes. In just 6 minutes, you'll learn about how they work and how to properly test them. Plus, you'll learn a
Reading schematics is an essential part of troubleshooting, but it's not always clear how to break down a circuit into understandable bits. Is there an easy rule of thumb for identifying what component does what and how to go about testing it?
In this excerpt from one of our many full-length technical training webinar recordings, you'll learn exactly that! In addition, we'll show you how to break down a seemingly tangled schematic and identify loads in series vs. loads in parallel -- all in
Take a look at this LG gas dryer schematic, paying special attention to the circuit with the flame detector.
If you trace it out, it becomes a bit puzzling what that circuit is actually doing. The hi-limit thermostat, the safety thermostat, and the flame detector don’t appear to have any direct effect on the gas valve coils as you would find in other dryers. So what purpose do they serve?
This markup makes it all clear.
Unlike many circuits that use controls li
Electricity and circuits are at the core of what we do as techs. You've got to have a solid understanding of these in order to do any meaningful troubleshooting. So that's exactly what we cover in this excerpt from one of our many technical training webinar recordings. Give it a watch and build yourself a solid foundation!
This video is an excerpt from a longer Master Samurai Tech webinar and is free for anyone to watch. In the full webinar, we covered topics such as:
When it comes to troubleshooting BLDC motors and inverters, there's usually a standard strategy. You check the input to the inverter (a good 120 VAC power supply and a PWM signal from the main control) and you make sure the motor windings are in spec and all the same resistance. But what about measuring the output of the inverter?
This is certainly possible to do, and it can be a useful measurement, especially in hairier inverter troubleshooting scenarios. But before we get into that, let's
In this clip from a longer webinar, we give you the long and short of how NTC thermistors work and how to troubleshoot them. Don't know what NTC means? Don't worry -- that's covered in this video, too!
Want to watch the full webinar, which goes through using the Samurai's Troubleshooting Ten-Step Tango to nail refrigerator problems every time? Click below -- viewable only by premium members.
This past Sunday, we gave a webinar covering everything you need to know about thermal controls in dryers and the underlying technologies behind them. The full recording dives into all the details of identifying, understanding, and troubleshooting these ubiquitous devices.
In this short clip, we'll introduce you to the three technologies and show how different manufacturers give them various (and sometimes confusing) names.
Want to watch the full webinar recording? Click belo
There are a lot of funky things going on on this Electrolux dishwasher schematic -- including normal-looking switches that are labelled "transistor switches". What does this label mean, exactly, and how does it affect our troubleshooting? That's what the Samurai breaks down in this short clip from a longer technical webinar recording.
Want to watch the full webinar? Click below to watch -- available only to premium members.
Some circuits have a bit more going on than they seem at first glance, and this Whirlpool washer has one such circuit. Watch the excerpt below to learn how to unravel this tangled mess of lines and apply it to your troubleshooting.
Want to watch the full webinar recording where we go through the entire schematic analysis, covering tracing everything out and covering topics like triacs, shunts, and series loads? Click below -- viewable only by premium members.
Thermistors are everywhere in appliances these days, and they're a relatively common-fail item, so wouldn't it be nice to stock a supply of them in your service vehicle to be used on any occasion?
Well, in order to determine how feasible that is, we need to answer a question: are all thermistors interchangeable?
The short answer is no. The long answer is that thermistors are not interchangeable brand-to-brand, but they can be interchangeable within the same brand, depending on the manu
It should always be our goal to get our diagnosis with as little disassembly as possible using our schematic-reading know-how, but did you know that you can sometimes track down the problem without any disassembly at all?
That's just what the Samurai did for this Thermador gas range. Want to learn how he pulled off this magic trick? Watch the video below.
Want to watch the full recording? Click below -- viewable only by premium members.
We techs should always be looking to sharpen our repair skills, and one of the best ways to do that is to learn from each other's experiences.
In this excerpt from a longer webinar, the Samurai walks through a Bosch dishwasher no heat problem that he encountered, working through his thought process and schematic analysis step by step. Watch it and learn a thing or two!
Want to watch the full webinar recording? Click below -- viewable only by premium members.
Here's our scenario: you're working on a Samsung WA50K8600AW washer that won't advance in the cycle. Error codes and test modes aren't telling you anything useful, and the control doesn't even seem to be trying to advance the cycle. You've checked the air tube connected to the pressure sensor, too, and everything is clear there.
What can you do here? Do you just call it a bad board and move on?
Let's see if there's a smarter test we can do on this one. What if we could test the signal
You don't have to be a physicist or a mathematician to troubleshoot properly, but you can't get around the fact that math is the only way to really understand electricity. Sine waves are one such mathematical representation used for both voltage and current. But how does this representation work, exactly, and how does it help us wrap our head around voltage, current, and power?
That's what we'll break down for you in this excerpt from one of our many full-length technical webinar recordings
Let's say you're on a call for a Whirlpool GI6FARXXY07 refrigerator. You notice that the evaporator fan isn't running, even when the unit isn't in defrost. "Simple enough," you think, and you disconnect the fan harness and check its resistance.
Wow -- 500 K-ohms! No way that's in spec. Gotta be a bad fan motor, right?
Before we get too hasty, let's step back for a moment and do what we should have done at the start -- look at the schematic. When we do that, we can pretty easily locate