Replacing the heater in a Bosch dishwasher

The design of dishwashers and washing machines is quite similar, but if you set a goal to carry out a comparative analysis, we will see that the “dishwasher” scheme is significantly simplified. But do not be deceived, the repair of such equipment can be quite a troublesome process. In this case, much depends on each particular model. Bosch dishwashers are considered reliable equipment, but they occasionally fail. Most often in the Bosch dishwashers the PETN breaks, therefore we will consider how to diagnose and fix this problem.

Breakdown diagnostics

Advanced Bosch dishwashing machines are equipped with an electronic self-diagnosis system. If it detects a failure of a particular part, the corresponding alphanumeric signal is sent to the dashboard.But it happens that the heating of water is slow, and the system does not fix violations in the work. In this case, you have to think on your own, and do a manual diagnosis of the bosch dishwasher.

Inspection is carried out as follows:

1. Install the dishwasher so that the bottom panel is at the top.
2. Remove the back panel (if the device is not embedded) or remove the bottom wall (for the embedded model). To successfully dismantle the panels, disconnect the drain of the drain system from the water tank, then gently pull the wall towards you and it will easily come off.
3. Using a multimeter, check the status temperature sensor, carefully inspect the wiring and contacts for damage to the insulation and traces of melting.
4. If the inspection of the sensor did not reveal critical malfunctions, it will be necessary to inspect a heating element for dishwasher Bosch.

Remember, the final dismantling of the panel is not provided by the design, and you do not need it. To get to the necessary nodes, it will be enough to bend the wall a little.

Temperature sensor check

Internal organization

Inside the body of the bosch dishwasher all spare parts and control elements are installed. The main details of this system are considered:

1. Flow through water inlet valvewhich is equipped with an intake system, the control is carried out by a microcontroller.
2. Filtration mechanismcleansing water from small parts of food and other debris.
3. Drain systemconsisting of a drainage pipe connected to the drainage system and the drain pump. It works on the same principles as the Bosch washing machine.
4. Float lock, the protective system of the dishwasher from the various leaks. It is a cylindrical plastic container, which closes the contacts when floating. This happens in the case of abstraction of excess water.

Types of heaters

The main problem of the heater for the dishwasher brand bosch is a frequent overheating. This phenomenon is associated with growing layers. scum. Such a situation is inherent in a tubular electric heater, especially if specialized salt is not added to the water for softening.

Water heater (Teng) flow type

The heaters of the bosch dishwasher can be:

1. Submersible or so-called wet. Such a heating element has direct contact with the liquid and carries out its direct heating.
2. Drywhich are surrounded by a steatite flask for protection.

Experts consider dry heaters more efficient. Due to the lack of direct contact with the working fluid, they can last much longer. The wide flask promotes fast heating of water and formation of smaller amount of a scum. Among other things, the dry PETN protects the dishwasher from the dry tube, and is quite easily dismantled for replacement with a new one.

Replacing parts

The Teng system is located quite close to other control nodes. It is this circumstance that makes the replacement of the heating element in such an appliance as a dishwasher rather troublesome. To successfully replace the heater for the dishwasher, follow these instructions:

1. Open the hopper panel and remove the dish tray.
2. Disconnect the unit from the mains and disconnect all connections.
3. Remove the plastic irrigation mechanism located at the bottom of the dishwasher.
4. Next to it should be a plastic cylinder. it filter, delete it.
5. Dismantle the steel net below.
6. Unscrew the five screws securing the hose and heater flow blog.
7. Install the unit on the top panel, providing free access to the bottom.
8. Remove the back cover.
9. Dismantle pump. To do this, unscrew it clockwise, then gently pull it aside. Remember: scroll it enough for half a turn, do not make sudden movements. Remove the temperature sensor and set aside the pump.
10. TEN is attached to the bottom of the machine with a rubber element. It is quite easily removed.
11. Remove the rubber hardware, disconnect the hoses and wiring. Remove the failed heater from the system and replace it with a new one.

Assemble the machine in the reverse order, following the instructions exactly.

The heating element is called the heart of the dishwasher, and this statement is not far from the truth. Critical damage to it can cause irreparable damage to the entire device, as well as lead to leakage and great trouble. Monitor his performance regularly. descale and replace as necessary. The process of installing the heater does not take much time, and timely intervention will save from even greater problems.