One of the most frequent breakdowns of the dishwasher is the lack of heating water. Typically, the reason lies in the gradual formation of scum, which causes overheating of PETN, followed by its failure. Another reason for which it may deteriorate the voltage swings are on the network. Perhaps the dishwasher will work, but without the necessary hot water. In these cases need to replacing defective PETN in a dishwasher at a similar or compatible with this model.
Bosch Dishwasher by Aristo or heating element may be of two types. Fastest heating provides a flow heater embodiment where water passes through the heating tube. More usual alternative is tubular with a spiral inside. In current machines this element is combined with a circulating pump. To replace the need to purchase a block assembly.
If the repair will be carried out independently, with the purchase of spare parts pay attention to the ENR number, which will purchase the item is compatible with your model. Usually it is situated on the upper edge of the front cover and is a combination of Latin letters and Arabic numerals.
diagnosis of failure
Before performing any work necessary to make sure the causes of failure. It is not always possible to make with the help of regular self-diagnostic system. There are times when a fault type is not, but the device does not work. In this case it is necessary to check the serviceability of the temperature sensor by hand. To do this:
- on a stand-alone machine to open the back wall;
- Visually inspect the sensor and the contacts for signs of burning and / or melting;
- test it with a multimeter;
- if the unit is built will have to turn it upside down, remove the bottom panel and follow the same steps.
All measurements should be carried out on a dry pump. The serviceable heater resistance will give 21/22 Ohm. If there are problems, it will correspond to infinity, that is a sure sign of the need for repair.
Set of tools
If it is satisfied in addition to the necessary parts required tools. It is better if it is prepared in advance. At hand you need to have:
- Screwdriver pair in a cruciform embodiment and splined;
- pliers;
- simple multimeter;
- awl.
Do not forget about the instructions or the instruction manual that came with the kit. They help to cope with possible problems faster.
Preparing for repair
Before starting work, you must turn off all communications and place the device so as to preserve the greatest possible freedom of movement. Avoid additional damage, damage and contamination of flooring will litter of dense cushioning material. The sequence of preparatory operations, as follows:
- remove all trash from the inner compartment;
- unplug the power cord from the outlet;
- free access to communications;
- bight disconnect the water supply, the water pre-blocking;
- remove the siphon drain tube.
After performing all these operations the dishwasher can be moved to the place of repair.
disassembly stage
Create a unified description of the procedure for disassembling the variety of dishwasher models is almost impossible. Even within the same brand overall design similarity is supplemented by numerous nuances. In general, disassembly sequence might look like this:
- open inner compartment, dismantle the filter mesh and sprinkler;
- filter plug the hole to prevent water flow while turning;
- remove the protective wall on each side, with front and rear side, unscrewing the screws and loosening the latch;
- remove insulation;
- machine invert upside down;
- remove the electronics module;
- disconnect hoses and nozzles;
- weaken the latch and with a slight upward force to remove the bottom panel.
replacement heater
can proceed to its dismantling and replacement after the opening of access to the block of the circulation pump and the heater. The block structure is coupled to a rubber fastening elements yoke and three chips with wires. To change it you must:
- remove all the chips to the contacts;
- remove the clamp from the tube;
- putting his hand under the body, remove the rubber fasteners;
- remove the heater from the case.
PETN installation and assembly of the machine in the reverse order. All operations should be carried out carefully so as not to damage the fragile plastic parts. If you have experience of similar works replacement process does not take much time and will not cause difficulties. If it does not exist, but instead in the presence of great doubt, the best solution would be an invitation to the after-sales service, which will provide high-quality and prompt repair.
