The occurrence of error E09 in a Bosch dishwasher indicates a breakdown of the electric heating element. This indicates that the household appliance needs to be repaired urgently. You can replace the heating element yourself or seek help from specialists.
Deciphering the fault code
The heating element in the dishwasher is significantly different from those installed in washing machines. The part is embedded in the recirculation pump and cannot be changed separately from it. When the dishwasher is operating, the pump pumps water, which is then passed through the electric heater. The hot water pressure created in this way washes the kitchen utensils.
The device unit, consisting of a heating element and pump, repair specialists, call a “warm” washing mashine engine. To make a replacement, you need to know the model of the device, since error code E09 appears only in household appliances belonging to the third generation.
In rare situations, the error indicates a failure of the temperature sensor and indicates incorrect functioning of the main module. This error code occurs when the electrical wiring that goes from the water heater to the module is damaged.
Causes of electric heater failure
There are not many reasons why code E09 occurs. Among them:
- Water leak. Liquid enters the electric heater due to a leak. Typically, liquid enters the heating element through a rubber seal located between the machine body and the filter bowl. When the seal and gasket wear out, a leak may occur.
- Drain filter clogged. The filter needs to be cleaned periodically. This will protect the device from breakdowns and prevent errors from occurring in the future. If there is a blockage, water is poured into the container slowly. Due to the long wait, the electric heater overheats and stops working at full capacity. To solve this problem, open the door from the bunker. At the bottom they find a filter mesh. It is taken out and washed with running water. No matter how thoroughly the dishes are cleaned after eating, small pieces of food still remain on the plate, which inevitably leads to clogging.
- Scale. If there is little salt in the ion exchanger, then the liquid entering the device is hard. Heating such water leads to the formation of scale on the heating element. The greater the deposit, the longer it takes for the water to heat up. To avoid this problem, you should use salt. It will soften the water and prevent scale formation.
- Malfunction of the wiring and breakdown of the temperature sensor occurs due to unstable operation of the electrical network. To prevent this problem from occurring, install a voltage stabilizer and connect the dishwasher to it. If this is not done, the module responsible for control will burn out.
Actions for error E09
What to do if error E09 occurs? Initially, it is necessary to exclude a failure in the electronic control system.To do this, disconnect the dishwasher from the electrical network, wait about fifteen minutes and turn it on.
If restarting the household appliance does not eliminate the error, and it is displayed on the screen, then you need to make sure that the heating element is working. Replace it if necessary. You can carry out the repair yourself or seek help from a specialist.
DIY electric heater replacement
The heating element, with the advice of skills, can be replaced independently. For repairs you will need the following tools:
- new working part;
- multimeter;
- crosshead screwdriver.
As mentioned above, the water heater in dishwashers is connected to a circulation unit. To remove it from the machine, you need to completely disassemble the device and replace the damaged part with a new one.
At the next stage, the front part of the unit is removed. To do this, unscrew the plastic clips. They are located at the edges of the machine body. Disconnect the metal panel located under the door of the device.
Afterwards the thermal insulation is removed. Disconnect the screws that support the tray. Open the dishwasher door and remove the basket intended for dishes. The sprinkler located below is removed. Unscrew the drain filter. Remove the metal mesh located at the bottom of the dishwasher.
The screws located on the side of the hopper and fixing the recirculation unit are removed. Place a large cloth behind the dishwasher that absorbs water well. The household appliance is placed on the back. The filling pipe is disconnected from the recirculation unit.Remove the pallet. Drain pump turn clockwise and disconnect. The circulation block is removed from the mounts.
The drain hose from the machine is removed and remove the assembly to the outside, having previously removed the chips with wires. The clamp connecting the heating element to the circulation pump is removed. They take out a new part and install it in place of the damaged one. At the same time, screw in all the chips. The dishwasher parts are installed in place. If you doubt the serviceability of the heating element, use a multimeter to determine the contact resistance.
Conclusion
The article described in detail how to fix this error yourself. If replacing the heating element with your own hands seems difficult, then you need to seek help from specialists.
