Dishwasher Drying Problems

Modern domestic appliances are being designed to reduce the impact they have on the environment, manufacturers of dishwashers are playing their part in this whilst maintaining high levels of cleaning and drying.
One of the ways manufactures have reduced the amount of energy consumed in a dishwasher cycle has been to alter the drying phase or cycle. In earlier models manufacturers such as Bosch , Smeg and Whirlpool along with many others achieved this by energising an exposed heating element during the drying phase. This heating element heated the wash tank which in turn evaporated the water from the pots within the dishwasher, this was aided by the addition of rinse aid during the last rinse cycle which helped reduce the surface tension of the water on the pots allowing it to dry with better results. This process whilst giving good drying results was a very inefficient method.

Modern day appliances such as Kenwood , Beko , Rangemaster and Gorenje to mention but a few use a tube type heater to heat the water as it flows through the heater. Whilst this is much more efficient in the wash cycle it has meant an alternative method is required for drying. The element is now not used in the drying phase, but the heat required to evaporate the water is generated during the last hot rinse which is then transferred to the pots inside the cabinet. This heat that is stored within the pots is then sufficient to evaporate the water deposits once again with the aid of the rinse aid added in the last rinse.
If you should encounter poor drying results the following may assist you before calling out a service engineer.
1 As drying is now performed with the aid of stored heat certain materials such as plastics , wooden items and pan handles have poor thermal conductivity properties and therefore are unable to store enough heat energy to aid complete drying. This is not a fault of the dishwasher and the majority of these water droplets will eventually evaporate naturally but may leave calcium stains on the items.
2 A water hardness test should be carried out to ensure that the water softener is set to the correct setting along with the dosage meter that dispenses the rinse aid.
3 Items such as teflon coated pans and ovenware may have water droplets remaining on them due to the heat barrier that is created by the coating.
4 Certain wash cycles do not incorporate a dry cycle or heated final rinse in order to make them more energy efficient. In these cases the door should be opened at the end of the cycle to aid natural drying. However, if you do this ensure the appliance is installed in such a way that damage cannot occur to surrounding cupboards , worktops and other items.
5 Some dishwashers have an option for using combined washing detergents and tablets such as 3 in 1 and 5 in 1. These products are sometimes not as efficient as separate detergent , rinse aid and salt dependent on the minerals in your water supply.

Should you still be encountering problems and require a service call to repair your dishwasher contact us

Common dishwasher problems – unwanted noise

This is not uncommon with dishwashers. Most dishwashers have an anti-flood device installed. This device can be simple, such as a float and switch or a complicated unit activated by pressure or back pressure. Either way, the device will switch on the drain pump when activated, this clears the dishwasher sump of water, it also disables the filling circuits or valves on the dishwasher. Therefore it will not fill with water whilst the anti flood mechanism is activated, both measures ensure that the incoming water supply is stopped whilst reducing the water that escapes to your floor. This is quite a tricky job. To resolve this problem contact us here