A few details save time.
You don't need to diagnose the appliance yourself. Brian needs the symptoms, the brand, and the model number when it's safe to reach.
Stop and call for guidance.
Stop using the appliance if you smell gas or burning, see smoke or arcing, find active water near electrical components, or hear severe mechanical grinding.
Write down what you notice.
These boxes are just for you. Nothing is sent anywhere.
Find the model plate.
Every appliance has a manufacturer label with the model number. Don't pull out a heavy appliance or take anything apart to find it.
Refrigerator
Inside wall, ceiling, door frame, or behind the lower kick plate
Washer or dryer
Around the door opening, under the lid, or on the rear panel
Dishwasher
Along the side of the door or door frame
Oven or range
Around the door frame, storage drawer, or rear panel
Microwave
Inside the door opening or on the rear label