Dishwasher does not drain

If the dishwasher stops pumping, there is one of the classic malfunctions. When troubleshooting, you should systematically approach, as this can have different causes. Here we have put together for you what can be responsible for ensuring that your dishwasher does not pump out.

Even before the program starts, most dishwashers pump off

A problem with the pumping out may already exist before the dishwasher starts the cleaning program. Because most dishwashers previously pump off the old dirty water, which is located in the sump under the sieves. If the dishwasher does not draw water, it can also be associated with problems when pumping out.

Components around the process

In addition, you should check all the components that have to do with pumping out the water. Below the individual assemblies and components:

  • Strainers on the bottom of the dishwasher
  • including the pump sump with residual water
  • therein a drain line or direct access to the impeller housing
  • Lye pump with impeller in impeller housing
  • drain hose
  • Drain connection on the siphon
  • Drainpipe in the house

Clean sieves

First, clean the sieves of your dishwasher. Take out the lower harness cart. Dishwashers usually have several sieves. The instructions for use describe where exactly they can be found.

Check pump sump, drain pipe and impeller housing

If the sieves have already been removed, the pump sump is open. Now you can also check if there is a foreign body. Either somewhere in the area of ​​the pump sump, in the drainpipe or in the impeller housing. Already a part of an aluminum packaging of a yoghurt cup can impair the pumping function.

Drain hose, siphon and drainpipe

If you could not see any abnormalities here, or if the problem persists, you must now remove the dishwasher. That's the only way to get to the drain hose. Check this for kinks, then check the siphon as well. If necessary, you must remove the entire drain hose (close it to the siphon and to the dishwasher).

The drain pump as a source of error

If you can also exclude these possibilities, everything in the direction of the defect rounds up around the drain pump. If you have not been able to determine if the impeller housing is free, you will need to check it now. You can access the housing either via the pump sump or behind a side panel.

Foreign matter in and defects on the pump

Do not just check the housing for foreign matter. In addition, you must also check the smooth running of the impeller. If this is difficult or impossible to turn, the drive shaft may have eaten. This may be due to what has previously been leaking the dishwasher, or you have noticed water under it.

There are two different systems according to which the lye pumps are designed:

  • with magnetic coupling
  • with coil motor
magnetic pumps

In older dishwashers can relax the magnetic effect. Then the impeller does not turn at full power or not always. The defect can therefore be incomprehensible for some time. However, you should then hear irregular noises from the drain pump.

coil pump

Coil pumps (with motor) have a drive shaft that can eat. For branded dishwashers there are sealing and repair kits. Ultimately, it may also be that you need to measure the drain pump. However, you need sound electrical knowledge for this.

Tips & Tricks

In most cases it is an easy problem to solve. Defective lye pumps are the exception. However, if it is a relatively new device, it is very important to check the warranty before repairing it yourself.
You can read about the principle of operation and possible sources of error in connection with the washing machine's drain pump here.

Video Board: How to repair a dishwasher, not draining - troubleshoot Whirlpool