Dishwasher I have a whirlpool dishwasher that does not appear to be getting hot water. The washer water is cold initially and only seems to get warm once the heater in the base of the machine heats it. The hot water supply line does not get hot so I presume no water is being supplied. Is the water supposed to be hot at the start. If yes could this be caused be a faulty inlet valve and if so how can I check. The dishes are dirty especially on the top rack. Thanks for your help. David

Dishwasher must be connected to a hot water line in order to work properly. Also, it often requires a good deal of time for hot water to make its way from the water heater to the dishwasher. If the dishwasher is located under the kitchen counter, turn on the hot water in the sink until it runs hot, then start the dishwasher.

Many dishwashers have a built in heater, but hot water should be initially fed into the dishwasher through the water inlet in order for it to perform properly.

see this causes and fix it. God bless you
will not run on cold water or even luke warm water, it has to be hot water. Most will even specify 120F or hotter water temp as incoming water. These new units only use 1.5-3 gallons of water for each fill, so the temp has to be there. Many brands recommend that you run your kitchen sink water until it gets hot, then start filling your dishwasher, we also recommend that. Some dishwashers will stop if it senses too cold of water coming in, others will try to warm the water and if it can't in so much time, the unit will stop and give an error code. Hot water also helps dissolve and mix the soap detergent better, giving you better washing results. Just make sure the water is hot going into your dishwasher, no getting around it.

Hi -
I can't see how any installation problem would cause this - if the dishes are still wet at the end of the cycle, you'll probably find the water isn't heating during the wash cycle. The dishwasher uses steam to heat the washing compartment and dry the dishes. It would appear that the dishwasher isn't heating water internally.
Even if the washer was accidentally connected to the cold water supply ** (see note), this shouldn't happen as regardless of the water supply temperature, the washer should still heat the water to the correct temperature internally.
** UK dishwashers should be connected to the cold water supply. For US installations, dishwashers are commonly connected to the hot water supply. For other locations, please consult your installation instructions.
I suggest you start a regular wash cycle and leave it to run for 10-15 minutes. Then open the door and test the temperature of the water in the base of the washer by hand. The water should be hot and there should be steam present in the washer when you open the door.
If the water is cold or only warm, the water isn't being heated internally or isn't heating to the correct temperature, in which case you should contact the retailer or Bosch Service immediately for a replacement. Do not accept an offer of repair on a brand new washer!
Additionally, do not attempt to repair the dishwasher yourself when under warrantly as this will invalidate the warranty.
Hope this helps. If you need further assistance, please let me know your location and the model number of the washer. This should be laser-etched into the top of the door if you can't find it on any of your paperwork.
Regards, BElectric

No, you do want to make sure that your water heater is set to 125 to get the best wash

THE WATER LINE TO THE DISHWASHER SHOULD BE FROM SAME HOT WATER LINE TO THE SINK. RUN THE HOT WATER IN THE SINK UNTIL HOT THEN TURN ON DISK WASHER AND CHECK THAT THE TEMP IS CLOSE TO SAME TEMP. HAVE SEEN COLD WATER LINE USED. YOU SHOULD BE ABLE TO SEE WHICH LINE THAT THE WATER LINE TO DISHWASHER IS CONNECTED.

Try turning on the faucet by the dishwasher and let the water run until it gets hot. Once this is done turn on the dishwasher and see if the water is warm or hot. Most dishwashers do not heat the water (residential dishwasher) they take the hot water from the hot water side of the sink. If the water heater is located a distance from the dishwasher then the cold water fills the dishwasher before the hot water can make it to the unit. This should cure your problem.

Hope this helped

Dave

I find it odd that the dishwasher is filling with cold water if the water is hot at the sink. It sounds like the dishwasher is connected to the cold water line rather than the hot. Check under your sink; if you've got standard plumbing, the dishwasher supply line should be connected to the left water pipe.
Regardless, the water temperature doesn't fully explain the symptoms, especially the detergent left in the door (assuming you're using fresh detergent and it's not caking in the door prior to washing).
I would check the blades again. Even thought they may appear clean, there may be debris in them that get forced into the openings during operation, but fall away from the openings when the water flow stops. Remove the blades, run water into them, then invert them to drain while rocking back and forth. If there's crud in them, you may need to do this several times.

Hi Jon, is this a new machine that you have just got? if so it sounds like the hot and cold water pipes are on the wrong way round. If not sounds like a thermostat problem

When you run the hot water at the kitchen sink until it is hot and start a cycle on your dishwasher, is water hot when you open the door after it stops filling?
If no, the diswasher is connected to the cold water line, not the hot water line. The water temerature entering should be a minimum of 120 degrees but no hotter than 140 degrees.
If the water going in is hot, but it cools down after each filling then the heating element has failed and needs to be replaced. When the heating element fails, the dishes, especially the glassware will be foggy and still dirty.
Please reply with what you find. Good Luck!

most diswashers only hook from the left side under the sink which is hot, some dishwashers on hot make the water extra hot with the bottom element for pots and pans, sounds like your dishwasher is working properly, you need hot water to sterilize. Rob