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Appliance Repair Tech Tips

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Entries in this blog

Dealing with Bad Heater Specs on an LG Dryer

Imagine you're in this situation: you're trying to do some ohms testing on heater of an LG electric dryer. You're reading 21 ohms across a single coil, and 42 ohms through both coils. But when you look at the spec on the schematic, you're seeing almost exactly half that: Weird. Maybe the heater is out of spec, but that's a weird discrepancy. And it's bizarre that we're reading double the specs given. Can we can get a second opinion? You look elsewhere in the manual, and you find

Son of Samurai

Son of Samurai in Tech Talk

Why Forums are Better than Facebook

Unlike when we first started Appliantology, the Internet is now full of appliance repair support resources. From Facebook groups to subreddits to Voxer and Telegram groups, you've got your pick of the litter when it comes to what flavor you'd like. Are there advantages to using a private forum-based site like Appliantology over the social media plantations? You betcha: Privacy and Functionality Feeding Big Brother All the Big Tech social media sites have one thing in common: they

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Take a Deep Dive into Understanding Household AC Power Supplies...

All appliance repair techs should understand the AC split-phase household electrical power supply that they deal with on a daily basis. But the fact is that most do not, and there's a lot of disinformation and "tech myths" out there about these power supplies. But they re easy to understand once you grasp a few fundamental concepts about electricity and split-phase voltage. And that's exactly what we cover in this webinar recording! Topics covered include: How sine waves are us

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Think You'd Never Be Stumped By a Dryer? Think Again...

We're taking a step back from our fancy electronics to the good ol' days of simple AC circuits. Well, I say "simple", and that is true -- but engineers back then had to pull out all the stops and do some pretty cool tricks to get the functionality they wanted. This means that, to really understand what's going on in these older circuits, you need to have a firm grasp of both AC circuits and the technology used. In this webinar, we: Work through 4 real-world dryer case studies that h

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Can You Handle These Tricky Circuit Puzzles?

Want to really put your technical know-how to the test? Well, have we got the webinar for you! This one covers a whole potpourri of circuit puzzles and troubleshooting scenarios, including: Some pop quizzes about series and parallel circuits Diodes, how they work, and the surprisingly tricky situations that can arise because of them Loads in series, how they work, and what they look like in a real refrigerator schematic A real world troubleshooting scenario invo

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Son of Samurai in Tech Talk

Diagnosing Temperature Problems in Computer-Controlled Refrigerators -- Including Samsung!

Special guest presenter Mark Williams will show you how easy it is to diagnose temperature problems in the newer electronically-controlled refrigerators and how to do it right the first time.  We'll show you examples from Samsung, LG, GE, Whirlpool, and Electrolux. You'll see that they all work the same way.  You'll also see how to accurately test thermistors from the computer control board and you’ll learn the difference between resistance and voltage drop when it comes to testing the

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How is this Miswired Dryer Still Able to Run?

In this short, easily-digestible technical workshop, we dive into some of the wacky things that can happen when a sloppy tech miswires a dryer terminal block. In fact, this dryer looks like it shouldn't be able to run -- the neutral wire isn't even connected! And yet it does run. How, you ask? That's exactly what you'll need to watch and find out. This and our dozens of other technical training webinar recordings are only viewable by premium tech members at Appliantology. Topics covere

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Son of Samurai in Tech Talk

Avoid These PCM Control Board Troubleshooting Mistakes by Using the Ten-Step Tango

A lot of techs lose their heads when it comes to control boards. This leads to the classic PCM behavior of "throw a part at it and hope it works." But isn't there a better way of troubleshooting computer-controlled appliances? Of course there is. With a concrete and logical troubleshooting plan like the Ten-Step Tango, you can troubleshoot any appliance with a control board with confidence. In fact, in many ways, a control board being present makes it easier to do your troubleshooting.

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Son of Samurai in Tech Talk

Learn How to Troubleshoot an LG Gas Dryer Like a Real Tech

In this interactive webinar workshop, we explored an LG gas dryer issue that had stumped an Appliantology tech. We performed a forensic analysis on the troubleshoot to figure out how it could have been improved, and then we moved on to thoroughly examine the circuits and understand how they work.  This and our dozens of other technical training webinar recordings are only viewable by premium tech members at Appliantology. Topics covered include... DC and AC loads Compute

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Son of Samurai in Tech Talk

Troubleshooting an LG Electric Wall Oven No-Heat Problem with the Ten-Step Tango™

What do you do when a seemingly simple problem stumps you? Well, it's times like that when it's essential to have a structured troubleshooting strategy like the Samurai's Ten-Step Tango. What is the Ten-Step Tango and how do you use it? That's exactly what we're going to teach you all about in this webinar recording, using a real-life example from here at Appliantology: an LG electric wall oven that won't heat. Strange as it may seem for such a simple problem, most techs would troubleshoot

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Son of Samurai in Tech Talk

How Does a Mixed-Up 240 VAC Power Supply Mess With This Dryer?

What would happen if you took a 240 VAC outlet and swapped the terminals around? What effects might that have on the machine that's plugged into it? That might just sound like an interesting thought question, but it's an issue that more than one tech here at Appliantology has had to deal with. So let's pull out a schematic as an example and start drawing some lines! By the way, the process I'm going to walk you through is something any tech should be able to do: puzzle out how a circui

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4 Essential Tips for CSRs

There are many standard items a CSR should collect from the customer (name, address, contact information, type of appliance, etc.), but I'd like to focus on the key features of a good service ticket that may be overlooked by some. If you make sure to follow these tips, you'll set your techs up for the easiest prediagnosis and best service calls possible. 1. Collect a valid model number A model number is essential for a tech's prediangosis. Without it, he cannot get the correct in

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10 Essential Tools for Appliance Repair

If you're getting into appliance repair, or even just looking to downsize an overstuffed tool bag, you might be wondering: what are the absolute essentials that you should bring with you on any service call? Well, having my fair share of experience in the field, I'll put forward Team Samurai's list of must-have appliance repair tools. Note that this isn't supposed to be a totally comprehensive list -- just the bare essentials. Multimeter with a loading/LoZ function If there's a t

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An Introduction to R600 and Lokring

We’ve all been hearing about R600 refrigerant for years now, and the reality is that it’s no longer an innovation in the area of household refrigeration; it’s the new standard. With the majority of new refrigerators now being R600 models, repair companies need to be ready to perform sealed system repairs on them. This raises a few questions for these companies: how is R600 different from R134a, and what do I need to service R600 refrigerators? R600 is a chemical called isobutane with p

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Son of Samurai in Tech Talk

Troubleshooting a Top-Load Washer Motor that Hums and Doesn't Run

I've got another scenario for you, taken right from the trials and tribulations of an Appliantology tech. Here's the situation: you're working on a top-load washer, and whenever you try to run a cycle, the tub doesn't move and the motor just hums. Right away, we have a decision to make: do we go ahead and tear apart the machine to take a look at the wash motor? After all, there are a number of mechanical failures that could cause these symptoms. Maybe we should just go ahead and get our han

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Son of Samurai in Tech Talk

What You Need to Know to Troubleshoot Vent Hoods

Vent hoods are pretty simple appliances -- something you've probably surmised if you've ever looked at the schematic for one. Usually, all they have going on is a blower motor and a couple of lights. When it comes to troubleshooting a hood, there are just two technology-related concepts you need to be familiar with: venting specifications and how multi-speed motors work. First, venting specs. As with any machine that produces exhaust as part of its operation, vent hoods have certain require

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Merry Christmas from Team Samurai!

Merry Christmas to all the Appliantology Brethren! Here's hoping that this holiday is capping off a great year for your business, and that an even better year is just around the corner.

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Son of Samurai in Tech Talk

Prediagnosis: How a Real Tech Prepares for a Service Call

Here at Appliantology, our primary mission is to support appliance repair techs in performing prediagnosis: the method of performing as much troubleshooting as you possibly can before setting foot in the customer’s home. Prediagnosis is the biggest factor in increasing FCC (First Call Complete) rates, and the higher the FCC rate, the higher your company's profitability. So how exactly does one prediagnose, and how does Appliantology help with that? Well, let's walk through the journey of an

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Diagnostic Modes: What They Can Do and How to Use Them

Some techs long for the "good old days" of mechanical controls, when troubleshooting appliances was supposedly simpler. But the universal use of electronic controls nowadays actually provides many troubleshooting benefits -- in particular in the form of error codes and diagnostic modes. The purpose of error codes is for the control to tell you its best guess of what's wrong, based on the algorithms programmed into it by the engineers. Note that the engineers' best guess is sometimes a very

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Do Ohms Lie?

"Ohms lie." It's become a popular phrase in the tech community, but what does it actually mean? Should you never do an ohms measurement? Are they completely worthless? Or is this phrase just another example of tech mythology? The answer is more complicated than any of that. Let's run through a quick example to demonstrate. This is an old-skool Whirlpool gas dryer, just like they were cranking out left and right in the good old days. Now, our scenario is a simple one: when we run

Son of Samurai

Son of Samurai in Tech Talk

NTC Thermistors: What Are They, How Do They Work, and How Do They Fail?

Anytime you work on a refrigerator with a control board, you've got multiple NTC thermistors in play. With how ubiquitous these devices are, it's important to know them inside and out -- especially how to test them. That's why we've made a webinar all about NTC thermistor technology for your viewing pleasure! In this short excerpt from one of our many technical training webinars, we cover topics like: What is an NTC thermistor used for and where will you find them? What does

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Son of Samurai in Tech Talk

Samsung Refrigerator Ice Dispenser Opening and Closing Repeatedly: Where Do You Begin?

Here's a puzzling scenario on a Samsung refrigerator: the ice dispenser door keeps opening and closing nonstop. When you encounter a weird problem like this, it's easy to lose your head and just start throwing parts at the machine and hoping one of them will fix it. But it's always important to keep our fundamental troubleshooting principles firmly in mind. In this particular case, troubleshooting is made even more difficult by Samsung providing us with a very low-resolution schematic -- bu

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What are Semiconductors, How are They Made, and How do They Work?

Everything runs on circuit boards these days, and wherever there are circuit boards, there are semiconductors. But what are semiconductors, exactly? How are they made, and what do they do? These are exactly the questions we'll answer for you right now in this excerpt from one of our many on-demand technical training webinar recordings. In it, you'll learn the answer to questions like: What are semiconductors? What are they made of? What is "doping" in semiconductors?

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Son of Samurai in Tech Talk

Step-by-Step Guide on How to Run Your Service Calls

The technical side of the service call is generally what gets the spotlight, but what you do before, after, and during the call is just as important to your profitability -- and I'm not just talking about soft skills. The way you organize your thought process and go about your troubleshoot is vital to service call success. And that's exactly what we talk about in this short excerpt from one of our many technical training webinar recordings. Topics covered include: How to run a servi

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One Simple Trick to Reading LG and Samsung Schematics

Both of the big Korean manufacturers -- LG and Samsung -- have a little trick that they like to use in their schematics. While I think they do it to keep the lines from becoming too much of a tangled mess, it can sometimes be a bit unclear for the uninitiated. Here's an example of an LG refrigerator schematic: The whole picture is a bit much, but notice all those bubbles popping up around the schematic? Let's pick one of those and focus in on it. Here's one coming off the sub PCB:

Son of Samurai

Son of Samurai in Tech Talk

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