Apparently pre-rinsing confuses the dishwasher or something. Not doing it leaves me with residue all over the other dishes though π€·
this post was submitted on 13 Oct 2026
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Running your faucet only makes sense if your dishwasher is also hooked up to warm water. (In Germany) I've only seen them connected to cold water.
It's an American thing. Our dishwashers get hot water from the line, there is a heating element, but it is not very powerful due to our lower output electrical sockets.
I've heard other countries have washers that are powerful enough to heat their own water, which is why they are attached to the cold water supply.
Do your dishwashers not have different temperature programs? Tap water is generally set at 65ΒΊC here. My dishwasher has a 45ΒΊC program, a 50ΒΊC program, etc. Depending on how dirty your dishes are you can use lower-temp program to save energy. They even make dishwasher pods specifically for lower temperatures. If it always takes in hot water it would need a way to cool it down.
Not for washing. Usually there will be settings like quick wash, normal, heavy and "pots and pans". There is a high temp and low temp option, but that is for drying the dishes.
It's not like you need to follow commercial requirements like DIN EN 17735, but that feels so weird to depend so much on the faucets temperature. I can just click a button and get a 70c+ wash or whatever, I wouldn't get that high from my faucet...
Interesting. Why? Do the dishwashers there require only using cold?
In the US, it is always meant to be connected to the hot tap. The first rinse cycle doesn't heat the water (or doesn't run long enough for the heater to make it hot, anyway). It depends on the hot water from the line to be maximally effective that first rinse. And once drained and refilled for the wash, the water will get up to temp eventually, but it's more effective if it starts hotter.
Much the same reason as electric kettles not being as popular in low-voltage countries as in Europe - with higher domestic voltage, the appliance itself can heat the water it uses in a timely manner.
Of all the things. Like what the fuck Germany.
We have 230VAC (on all outlets) instead of your guys' puny 120V, so our dishwashers aren't handicapped out of the box and can heat their own water properly. I feel like having to run the tap before doing dishes is an L for the US, not Germany/Europe?
For a country that's all about doing things big, they sure whimped out on their electrical system
In our defense we were very early to having one and everyone was afraid of electricity at the time
I was gonna say in our defence most of us can't be trusted with high voltage
Electricity in the usa is not weaker than Europe. Since the voltage is half as high, it just takes double the current to do the same work. A heater running 220v at 5 amps and a heater running 110v 10 amps will work exactly the same.
Except most home outlets are rated at 16 Amps so at 110V only gives you 1760W of power, whole on a 230v outlet you can get 3680W.
That is actually a perfect example of what I'm saying. You immediately assumed that we're talking about a "rated" "appliance" and not, for example, a "screw" "driver"
Wat? We have 230v also. We have both 120v and 220/240.
For stoves and ovens, not dishwashers.
It can be for anything you like. Dishwashers, dryers, heaters, hot water tanks, ac units, ovens, stoves, welders, car chargers, air compressors, hell, I've seen 220v coffee makers. If an appliance needs 220 it can be supplied.
A lot of houses are older than the concept of central heating or running warm water, so there are some homes that don't have central warm water, but instead small heaters under the kitchen sink/next to the bathroom, which might or might not hook up to dishwashers