Best advice from TC: verify the water is hot before starting the dishwasher. Especially if your water heater is located a ways from your kitchen and the pipes aren't well insulated.
Are modern US dishwashers plumbed into hot water?
NZ has 240 Volts (10 Amp 2400 Watt appliances are normal - anything above that needs special wiring). And NZ environmental regulations might be involved too (modern washing machines can be crappy because they try to skimp on water usage - our regulations can be overkill).
The reason cold or luke-warm water is a problem is that the programs are extremely simple and just assume the input is 110-120f and won't stall the cycle for waiting for the target temp.
Temperature sensing is extremely simple and cheap. Bi-metal contacts have been used since the dawn of electronics, and the solid state versions are also really simple. (Making components that are temperature invariant is the hard task.)
A bi-metal contact is only good for a single temperature, I think? (can be adjustable like thermostats) (I'm sure many but not all dish-washers probably do only need a single temperature...)
My dishwasher has a scalding 75°C option.
Likely dishwashers for the NZ market are designed to actually spend sufficient time heating the water.
My impression from watching the TC videos a while ago is that at least in the US, (many) dishwashers probably only do a insufficient time interval of adding more heat to the water.
It makes sense that different markets developed different ways; the brands that optimize for the local trends (cold vs hot water) can skimp on some features and have lower costs.
https://aurorixs.shop/product/watts-500800-instant-water-recirculating-pump-system-with-built-in-timerIn the summer... this is central Texas, so the sun helps keep the water in the pipes hot, so I imagine that the pump is on less often than in the winter. I've not checked though. My gas bills are not out of the ordinary, so I think it's not a ridiculous waste.
Yes.
Source; that time I replaced my fucking dishwasher because I couldn't figure out why it kept leaking so much everywhere.
I’ve since moved and use the powder with my current one, as recommended by Technology Connections, and have had good luck.
We started using the dishwasher on day 1 with TC's pre-heated water tip and have yet to have a single problem with the dishwasher.
My dishwasher's "normal" cycle is 3 hours, but it has a quick cycle that runs in an hour and does about as good of a job with marginally higher water and energy use. We mostly use the quick cycle.
(I'll preface this with: If your dishes are coming out clean and you're happy with them, then keep on keeping on. The reason there's a lot of discussion around this is because there are a lot of people who _aren't_ getting clean dishes out of their dishwasher.)
If you listen to your dishwasher's cycles, you'll probably hear it do a relatively short initial rinse to get off the bulk of the gunk, then the main wash, then another rinse. (Maybe multiple washes/rinses, but that's the general pattern.)
The idea is to make that first rinse most effective. Anything that can be taken off in the pre-wash cycle is something that won't be washed off in the main wash and cycled over the dishes over and over.
As people normally use their dishwasher, that cycle is being done with cold to lukewarm water and no soap. Most people wouldn't see a oily plate with dried-on sauce on it and think to clean it by spraying it in the sink with cold water until it were clean. But that's what the dishwasher's doing to their dishes.
Hence the suggestion of running the hot water tap first. It's a very easy thing to do to ensure the dishwasher's using hot water in that initial rinse and everyone generally accepts that hot water's going to dissolve and rinse off the food and oils better.
Another very easy improvement is adding a bit of soap to the basin. Most dishwashers only have a single compartment for soap and it's released during the main wash. If you throw a squirt/scoop of detergent into the basin before you start it, that will get mixed in to the pre-wash cycle.
The cycle's happening anyway, using hot water and soap is just making the most of it!
Anecdotally (like all these other comments), my wife's approach is definitely the "racoon on meth" archetype--throw the dishes wherever they could fit, throw one of those detergent pods in, hit "start", close it, wait a few hours, then take all the dishes out and dump water out of cups and bowls and handwash them because they're still filthy. When I was building the kitchen, she was questioning the expense and effort of the dishwasher because in her entire life she's never had one that actually cleaned the dishes properly and thought they were kind of pointless.
Since I didn't want to spend the next however many years hearing about how the dishwasher sucks, after we put it in I played dishwasher czar for a month. I loaded the dishes properly, put in the proper amount of soap (and a sprinkle in the basin), made sure the rinse aid wasn't empty, ran the tap first, ran the dishwasher. Every single load came out spotless. She'd often question something I was putting in because "there's no way it's going to get that off". It did. Every time.
Wife satisfied that the dishwasher is good and having had a month of instruction I unleashed the meth-y racoon on it, and we're back to the dishwasher being a really elaborate rinsing machine we use before handwashing the dishes.
Is it just the running the tap? Probably not. Just like it's not _just_ the adding soap to the basin, using the rinse aid, loading them properly, etc. They all contribute to "using the dishwasher most effectively".
Are US washing machines connected to hot water as well?
Remove solid gunk. Load dishwasher. Make sure you have Rinse-aid in the dishwasher. Run. Done. Comes out clean.
And yes they’re toxic. Of course they are! Next, let us coat all surfaces with antimicrobial toxins, starting with everything in the hospital, and your infant’s diaper-changing stations, and your stapler at work.
It will be just like Nethack, where you open a spellbook to read it, but it is “coated with contact poison!” so I hope your Unicorn Horn is available.
Home dishwashers, the ones that take 4 hours on average, are not going to result in the same thing. Claiming such would be like claiming you won't use dish soap since technically it can still be left on your dishes when quickly washed.
I've never had one that took 4 hours. The most is about 2.5 hours.
I guess we have wildly different levels of risk tolerance. I even use an extra rinse cycle. You will understand only after have gastrointestinal trouble. Speaking of which, have you had a colonoscopy lately?
If you've got both available, I can't see any reason why you'd choose to hook it up to cold. That just means it takes longer for your dishwasher to heat up.
It doesn't necessarily take longer to heat up, they are pretty much instant since they are designed to heat as needed locally as needed (don't need to heat a large volume of water) and they are at least as fast to provide hot water as a central hot water tank. They can be gas or electric powered depending on what is available/cheaper in the region and you never run out of hot water with an inline heater.
Even if you do have a central hot water tank, it's possible that heating water locally at the dishwasher is faster depending on distance to the tank. Anecdotally, I used to wait for hot water in the kitchen when I lived in Canada and I no longer do in Europe where I have no central hot water tank. In North America, recent high end home kitchens feature a local inline heater for hot water at the kitchen sink even though a central hot water tank exists.
Do you also have hot water plumbed washing machines?
That's because heating water from the 120 volt circuit that the dishwasher runs on is slow. (At least in North America, 240 volt countries might not have this issue.)
Central America, parts of South America, Japan, and Taiwan are also ~110 volt.
https://en.wikipedia.org/wiki/Mains_electricity_by_country#/...
The electric grid is three phase; 60 or 50 hz depending on where you are in the world. The voltage varies considerably, long distance transmission is in the kilovolts, or higher.
"split-phase 240V" happens at the transformer near your house, in North America. I don't know as much about the rest of the world, but I've always understood it to be ~440v split phase because it allows longer wires between the transformer and the house.
> "split-phase 240V" happens at the transformer near your house, in North America. I don't know as much about the rest of the world, but I've always understood it to be ~440v split phase because it allows longer wires between the transformer and the house.
Where I live, we have three phase 480/277V for commercial. I believe that is standard in North America, but I'm not really sure.
I had an instant 195 F (90.5 C) faucet in my previous kitchen which worked well for the rare times I made tea. Worked fine with a 120V circuit.
It's really more that historically Americans have been fine with drip style coffee makers instead of drinking pour overs or tea.