September 23, 2014

Appliance Myths – Dishwashers

Although we use our dishwashers often, sometimes daily, their inner workings remain a mystery to many of us. Here are some common myths busted for you.

Myth – My dishwasher is broken because there is some water in the bottom after the cycle is finished.
Truth – There should usually be some water left in the bottom sump of the dishwasher at the end of a wash. This water keeps the seals moist to avoid them drying out and leaking. When the dishwasher starts, it will first drain for several seconds to remove standing water, then it will fill with fresh water and begin the wash cycle.

Myth – A dishwasher pumps in water to fill it up.
Truth – When needed, a water fill valve simply opens to allow the household water pressure fill the machine. The pump is only involved in draining the appliance and washing.

Myth – A dishwasher stops filling when the float inside the tub rises high enough to represent a proper fill level.
Truth – Most modern dishwashers fill using a timing method, filling for a set amount of time. The float is usually for over-fill protection only, stopping a fill before it gets to the point of flooding. Under normal operation the float and float switch should never come into play.

Myth – If your dishwasher fails to function, you should call a plumber.
Truth – In most cases, no. Major appliances are considerably different from most other plumbing fixtures. Most plumbers are not familiar with the intricacies of the appliance itself and should only be called if the problem lies in the connection to the household plumbing.

Assistive Kitchen Robot Takes Stanford’s Dishes to the Wash

BoingBoing Gadgets reports:

The “Assistive Kitchen” robot picks up the dishes and takes them to the wash, thanks in large part to RFID sensors built into the plates and utensils in Stanford’s test kitchen. The team building the robot is also trying to teach it to surf the web to pick up new tricks, as well as self-optimize its routines to minimize the amount of running around it would have to do to pick up the dishes. (Pick up all the plates missing from the cabinet before returning to the dishwasher, for instance.)

Robot B21 today — Rosie tomorrow.

Robot chef gets a boost from wireless kitchen [New Scientist] (Thanks, Zoe!)

Hal 2000 as a dishwasher