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darkrave24 t1_isc27eo wrote

Reply to comment by YNinja58 in Dishwasher keeps going by Atlantic76

Look under your sink to see if your dishwasher is even connected to the same water line as your facet. Some have their own water line that may or may not run all the way back to the water heater. Plus most units heat the water themselves.

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seanthenry t1_ises1a8 wrote

They do heat the water but it is cheaper to use the already heated water from your water heater.

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LazingRoadrunner t1_isew97w wrote

They will heat the water themselves, but hot water is expected to be supplied to it - the higher the inlet water temperature, the more effective and efficient the wash. Almost all digital controlled units will throw a fault if the inlet water temp is below 70° f.

Starting with it hot (and using your already heated water from the water heater) is much more efficient for the machine.

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RJFerret t1_isf44x0 wrote

Typically there's a separate connection but the pipe in the wall is shared, there isn't an entire separate pipe running all the way back to the heater, second set of holes through allstuds/joists, twice as much material, etc., never seen that. That's why they're on a shared wall or near commonly.

You run the hot in the sink near the washer, to replace the room temp pipe water with hot, doesn't matter if washer's directly connected, once hot comes from the sink, the pipe's filled too.

It matters even more with newer washers that use less water as a greater proportion is what was in the pipe versus gets there from the tank.

You can also tell by opening the washer door as it fills, it'll be hotter then.

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