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Re: not heating water
First, open the door and look into the tub and locate the heating element (if it is covered, remove the lower dish rack and cover). The heating element has two terminals which extend through the bottom of the tub, note the general location where they go through.
To access the heating element's wiring, remove the lower panel located beneath the door. The panel is usually held in place with two screws either above or below the panel. It may be necessary to first open the door to the dishwasher to reach the screws over the panel, then close the door to remove the panel.
Look into the lower access area and locate where the terminals come through the tub. Each terminal has a wire connected to it. Label the wires and the terminals so that they can be properly reconnected. Pull the wire off of each terminal; they are connected with a slip on connector. Firmly pull the connector, do not pull on the wire. You may need to use a pair of needle-nose pliers. Inspect the connector and terminal for corrosion. If either is corroded they should be cleaned or replaced
Test the resistance of the heating element using a multimeter. Set the multitester to the ohms setting X1 and touch one probe to each of the terminals. A normal reading will be somewhere between infinity and zero. The exact reading differs by manufacturer and model. If the indicator does not move (infinite resistance) or moves to the other extreme of the scale (zero resistance) then the element is damaged and should be changed
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sorry - may seem odd - but your hot water tank is set to 120 or higher yes ? so why are you re-heating you water? - if you want to know you need the 2000w /230v - but really turn the re heat off - at 120 you kill the bacteria and will save $$
I have an older dishwasher also and recently my wife also complained about it not cleaning right... so me being the man I am tried in vain to clean the things... Bought new spray arms online and installed them in minutes...now the thing works like new... However I have also found that if the heating element goes bad then that also can mess things up bad... So I would buy new spray arms, and also check out the heating element to make sure it is working... Here is a tip that will help you with the online buying... Dishwasher Spray Arms not Spinning
It sounds like there's a problem with the dishwasher's heating element. The dishwasher uses the heating element to heat the water to certain temperatures, and it will wait (run for extra time) for the water to reach this temperature, and may eventually give up. When it's time to dry, the dishwasher uses the heating element to steam dry the dishes. If you're not technically savvy, you will probably need to have a pro work on the machine, but first check to make sure there's not hard water scale buildup on the heating element. If you're brave enough to work on the machine, you should check to see if the element's plugged in, check its resistance to make sure it conducts electricity, check the element's switching components, and finally the dw's computer board. There's a chance that the machine is just stuck in a loop or something. You should try turning off the circuit for a few minutes. There's a chance it may reset and start working.
No machine should have a 3 hour wash cycle. The timer will not advance if the water is not up to the proper temp. A severely extended wash cycle is usually caused by a faulty heating element. I assume the water supply line was hooked up to the HOT water and not the cold. And you run the sink until hot water is present in the line. The next time you run this machine, allow it to operate for a few minutes, then open it up and see if a ball of steam escapes. No steam = no heat = no timer movement. If this is the case, the resistance of the element will need to be checked with a multitester set to ohms. A faulty reading will be zero or overlimit or infinity and the element will have to be replaced. It may also be as simple as a broken or disconnected heating element wire. Good luck
If water is not heating up, parts that must be tested are the heating element, the thermostat , and finally the control assembly and wiring.
T he heating element is tested by reading continuity with a multimeter.
The thermostat can also be tested by reading impedance, that should result over 1Kohm at ambient.
If the multimeter and element read fine, then there is need to test wiring and timer control board. this is done by checking voltages at heating element and reading voltages on control board connectors. A faulty board can also be spotted by visually checking the board for burnt components or leaky and bulged capacitors.
-Have you changed the dishwasher soap recently? What are you using? Is the powder remaining behind in the soap dispenser?
-Have you removed the filter in the sump area, cleaned it and removed any debris under the filter. (watch out for broken glass that is almost always found in 5 year old dishwashers.)
-You are running water at the sink until it gets hot, but you may still have problems if the heating element has failed. Recommend you check that element. If you can get to the element, check resistence of the heater to see if is has any at all.
If heating element checks out good, the next common problem is a failing wash pump motor.