Our ZDT6255 dishwasher was installed three years ago and heas worked well since. However, we now find that the tablets or pouches of detergent do not dissolve and are left sitting on the floor of the machine at the end of the wash cycle. We have tried different makes, including Finish powder, with the same result. We have also tried Finish Gel but this produces a dried-on texture to the dish surfaces.
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Re: Tablets not dissolving
Sounds like whatever soap you are using is just too much soap your dishwsher can handle. The soap "packs" are usulally an overload of soap for most dishwashers. Just a few teaspoons of regular name brand soap sometimes will cure lots of dishwsher ills!!!
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One of the first things to check if the dishwasher detergent is not dissolving is the water temperature that is in the dishwasher. If the water temperature is too cold, it may not be able to dissolve the tablet effectively. . If it is below 130 degrees Fahrenheit the setting needs to be increased or contact a plumber for assistance.
Check if the circulating pump is actually working - are the dishes being cleaned at all ? If not - check pump for operation and replace if faulty.
If tablets are still stuck in a compartment - replace operating mechanism for tablet drawer, or - cheaper - put tablets in with the cutlery instead.
I believe that the instructions for using these 3-in-1 tablets is to place it in the open dish detergent cup, rather than in the closable compartment, since the tablet needs to get doused by a lot of water in oder to fully dissolve and be effective in getting the dishes clean.
Since the tablets are designed to dissolve more slowly, they are able to be used for the entire range of washing cycles. If it's a constant problem and you don's have an open detergent cup below or next to your closed detergent dispenser, just toss it into the bottom of the dishwasher instead.
The reason that the tablet isn't getting dissolved fully is because the door is preventing the tablet from dropping all the way out and the door is shielding the tablet from quite a bit of water spray.
Another option is to take a look at your owners manual for the dishwasher and see if they recommend these all-in-one tablets versus regular powered detergent and liquid rinse aid.
It sounds like you have a water supply issue. If you are on well water the screen in the water valve may be clogged. You can access this, remove it and clean it on most dishwashers. It is located in the valve where the water hooks up to the unit.
You could be using the dishwasher at a higher temperature than the biological agents in the tablets can handle, and so become denatured and can't clean your dishes properly. I have had this problem a little while ago and found that using the "eco" setting (should heat the water to around 30c and has the added bonus of using less water) works well and makes sure that all of the dishes are clean.
It could also be a problem with the release system, where the door the holds the tablet can't release it on time and so the tablet does not dissove. Have a check to see if anything is stopping the door opening and see if there is anything you can do to make it release on time.
Hope this helps,