this post was submitted on 29 Feb 2024
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It applies to all dishwashers except industrial. The washers assume a certain temperature of hot water coming in.
Is this the case for Europe as well? I know that European washing machines for example will take in cold water and heat it themselves, while American washing machines either take their water from the hot or cold lines depending on a user setting.
If your dishwasher starts washing shortly after you turn it on, then it probably didn't have time to heat the water... At least in North America, dishwashers have water heaters but they still rely on hot water coming in for best performance.
I looked it up in my native language - as to get localized results - and it seems like the general manufacturer's recommendation here in Sweden is to connect the dishwasher to the cold water, making any prewarming of the water unnecessary here.
I guess different advice for either side of the Atlantic is warranted, same as with washing machines - it's basically not possible to run a washer here with cold water as far as I know, you can only run it at 30 ยฐC at the lowest, where the washing machine will heat up cold water to that temperature itself.
Interesting. Kinda hard to understand the reason behind these differences sometimes. For clothes washers I think 30C would actually be considered cold in NA. My washer has tap cold, cold, warm, hot settings. So "cold" is actually heated... Only tap cold is unheated.