If the Hansa dishwasher displays an error code E4 on the display, the diagnostic system has detected a problem: water overflow. A full transcript will tell you where to look and how to fix the breakdown.
Why does the E4 error appear
The instructions indicate that the code E4 indicates an overflow of water in the system. For what reasons the machine could show an error:
- the pressure switch does not turn on or gives the board incorrect readings;
- shutoff valve broken.
How to fix the situation, read below.
What to do to fix the breakdown
Before embarking on the repair or replacement of faulty elements, it is necessary to exclude a system failure: when the board mistakenly gives a malfunction. Try resetting the code. For this:
- unplug the PMM plug from the socket;
- wait 10-15 minutes;
- start the technique.
Look at the screen of the Hansa dishwasher. If the icons are on again, you need to look for and fix the problem. First of all, check the pressure switch (level sensor), as it is responsible for the amount of water in the bunker. When he gives incorrect readings, the water can overflow.
In some models, PMM installs a flow sensor instead of a pressure switch.
Let’s describe the general sequence of actions:
- Disconnect the equipment from the network and communications.
- Empty the camera from the baskets.
- Turn the car over onto the back wall.
- Remove the panel from below.
- A plastic box with tubes is attached to the circulation block.
- To check its performance, attach the probes of a multimeter to the contacts and measure the resistance. If the value goes down to zero, the part is working.
- If defective, replace the sensor.
The filling solenoid valve is equipped with a diaphragm. In the off state, the membrane blocks the passage, but as soon as the valve receives an impulse, the partition opens and water is poured. The cause of the failure may be in the mechanical or electronic part.
To diagnose the mechanical part, an operating voltage is applied to the valve to check whether the diaphragm is working or not. Diagnostics of electronics PMM “Hansa” is performed by a multimeter.
The valve is easy to replace. It is enough to disconnect the wiring chips and unscrew the fixing screw.
This is how you can fix the problem with your own hands when code E 4 appears. For more information on how to replace the pressure switch in the dishwasher, read our separate article.