Repair guides
Pick a type, an appliance or a brand. Every guide lists the tools, the safety call-outs, the steps and the reading you should expect.
Diagnostic · 374
Symptom → most likely cause, step by step
Component tests · 69
How to test a specific part, with expected readings
Installation · 33
Install, replace and hook up appliances correctly
Fundamentals · 24
Core skills every appliance tech uses
Appliance
Brand-specific guides
5 guides · Dishwashers
Component tests · 5
Component test · DishwasherDishwasher door latch and door switch
The latch carries one or two switches that close when the door latches. The board will not start a cycle without them. Test continuity with the latch engaged and released.
Component test · DishwasherHow to test a dishwasher circulation (wash) pump motor
The wash motor pushes water to the spray arms. Older units use an AC induction motor; many newer ones use a brushless DC motor driven by the board. Rule out a jam and a filter clog before testing, and use the tech sheet for winding values.
Component test · DishwasherHow to test a dishwasher heating element
Many US dishwashers have a hidden or visible loop element under the tub. A good one reads in the tens of ohms. A leak to the tub trips the GFCI even when the resistance looks fine, so always check to ground.
Component test · DishwasherHow to test a float switch (dishwasher overfill and similar)
A float rides up with water and opens or closes a small switch under the tub. It stops overfill or flags a leak. Make sure the float moves freely before blaming the switch.
Component test · DishwasherHow to test a wax motor (dispenser, lid lock, diverter actuators)
A wax motor is a slow thermal actuator: a small heater melts wax that pushes a plunger out over a minute or so. Test the heater resistance and watch it extend when powered.