Your Dishwasher Is Not Heating Up Water or Drying

If you are finding that the items you load in your dishwasher are not being washed as well as they were, your dishwasher may have a water heating issue, as cold water is significantly less effective at removing food and dirt than hot water. We'll here explain to you what might be the source of this fault.

THE POSSIBLE CAUSES FOR THIS FAULT:

• There is an issue with the plumbing

• The drain filter is clogged

• The heating element is not working

• The temperature sensor is defective

• The compression chamber is blocked

• The pressure switch is faulty

• The high pressure switch is faulty

• The thermostat is defective

• The programmer is broken

• The circuit board is defective

WARNING
Before you do anything to your appliance, make sure you disconnect it from the power supply.
There is a risk of electric shock.

There is an issue with the plumbing

One possibility is that your dishwasher is not plumbed in properly and a siphoning problem is occurring. If your dishwasher's drain hose is inserted too far into your stand pipe, the water will drain from your appliance too quickly. This results in the water flowing into the dishwasher then being drained off via a siphoning process. The water thus continues flowing for a very long period of time. Where this is the case, your appliance will either go into fault mode or cancel the washing and drying cycles and end the programme, without displaying an error code and without heating up. To avoid this problem, we recommend raising the drain hose and fixing it in place using the bracket supplied with your dishwasher. Don't forget that your drain hose should be inserted no more than 10 cm into the stand pipe, which itself must be at least 65 cm above the ground.

The drain filter is clogged

The purpose of the filter is to trap scraps of food and dirt that come off the items you place in your dishwasher. If it is blocked or dirty, the washing motor's suction power will be reduced. Where this is the case, it may have an effect on your dishwasher's ability to heat up.

Purchase a drain filter for your dishwasher

The heating element is not working

The heating element serves to heat the water inside your dishwasher. If this component is defective, the water will not heat up and will not dry the items loaded into your appliance. You can test the heating element using a multimeter in ohmmeter mode. First unplug your appliance from the mains, then unplug the heating element connectors and place the multimeter probes on the element's terminals. If there is no continuity, you will need to replace it.

Purchase a heating element for your dishwasher

The temperature sensor is defective

The temperature sensor enables the circuit board to monitor the temperature of the water. If this component is defective, it can affect the temperature. You will suddenly find that the water heats only slightly or does not heat at all.

The compression chamber is blocked

The pressure switch controls the water level via the compression chamber and signals the heating element to begin heating. It is possible for the pressure chamber to become blocked and begin sending an erroneous signal to the pressure switch, which will in turn not regulate the water level properly. The pressure chamber can become blocked by fat or grease, for example. To unblock it, you first need to locate the pressure switch, which will be cylindrical in shape and coloured red, white or black. It is fitted with a small pipe around the same diameter as a pen. You need to unplug the small pipe then send water into the tube and towards the pressure chamber. To do this, either use a large syringe or take some water in your mouth and blow very hard. Once the tube is unblocked, you will need to blow air into it to thoroughly dry it.

The pressure switch is faulty

Another possibility is that your appliance's pressure switch is faulty. If this component is defective, your dishwasher might not heat up, and there may additionally be issues with the water level.

The high pressure switch is faulty

The high pressure switch signals the heating system to begin functioning, but only when the washing motor is operating and the water is at the correct level. If the high pressure switch is blocked by fat or grease, for example, the pressure will not be sufficient and the water will not heat up. It is possible to dismantle and clean this component. It may be located either:

• At the end of the black tube of around the diameter of a little finger
• Fixed directly onto the circulation pump
• On the lower spray arm supply tube

The thermostat is defective

The thermostat enables the appliance to heat to a specific temperature. If the thermostat is defective, the right temperature cannot be reached and the appliance will not heat up.

The electric wires have become damaged

All the functional parts of your dishwasher are linked together by electric wires. These can degrade due to either heat from the electric current or due to mechanical causes if they get folded, bent or cut. If this happens, and the heating wires have become detached, your dishwasher will not heat up. These wires most often end up getting cut at the door hinge. If you need to replace them, be careful when removing them as dishwasher doors can very easily cause cuts.

The programmer is broken

Le programmateur a de nombreux petits contacteurs électriques. Si les contacteurs son abîmés, certains organes ne seront plus alimentés, comme la résistance par exemple. Si c’est le cas, votre lave-vaisselle ne pourra pas chauffer. Vérifiez l’état de cet élément et remplacez-le si besoin.

Purchase a programmer for your dishwasher

The circuit board is defective

The circuit board manages all your dishwasher's functions (motor, heating, water, etc.). It controls whether or not the appliance heats up and whether it dries the items you have loaded inside it. If you have already checked all the parts described above, the fault may actually lie with the circuit board.