We troubleshot a weird no-heat complaint on a Whirlpool-built (Kenmore branded) dishwasher. This was Whirlpool's newer Global Wash System (GWS) platform dishwasher. Watch how we use the schematic to identify our Load of Interest and pick test points on the control board for measuring voltage, current, and resistance.
You know that complicated-looking cycle sequence chart on the techsheet you saw us using in the video? The one that no one uses because they don't understand it? Yeah, that one. We explained how to use it in an Appliantology Tips and Tricks webinar. It really is a powerful troubleshooting aid that lets you check all the functions and loads in the machine in just a few minutes. Premium tech members at Appliantology may watch this webinar recording here.
In this short video, the Samurai demonstrates how understanding how sealed systems work and move heat can be used to make non-invasive diagnostics on refrigerator sealed systems. In this case, we're using a design criteria for condensers called "temperature split". This is the difference between the condenser's SATURATION temperature and the ambient temperature. Saturation is the key here because you don't want the superheated or sub-cooled part of the condenser for your condenser temperature.
This temperature measurement assumes normal heat transfer at both coils (evaporator and condenser) and that that the compressor has been running (at full speed, in the case of a variable speed compressor) for at least half an hour.
You need to measure at the midpoint of the condenser and right on the tubing. This can be tricky to do with an IR gun on some condensers. In these cases, a thermocouple strapped to the tubing would give a more accurate reading.
Remember that this is just a quick screening test to determine if the problem is the sealed system or something else. It won’t tell you what is specifically wrong with the sealed system, just that something IS wrong with it. This would inform and direct your troubleshooting.
We teach sealed system thermodynamics, operation, troubleshooting, and repair in the Refrigerator Repair course at the Master Samurai Tech Academy. Self-paced, online, on-demand 24/7.
This video shows an emerging issue with some Samsung top load washers causing a no-spin or drive motor error code. A service bulletin on this problem just came out in October 2017.
The cause of the problem is that the wiring to the motor capacitor can break off. When the wiring breaks, it's not always obvious. A simple visual inspection can show the wires looking intact. This video shows you a common presentation of this failure.
As a bonus, I'll also show how to check error codes using the Fast Track and the service bulletin on this problem.