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Why Is My Bosch Dishwasher Not Cleaning?

White Bosch Dishwasher Repair

Why Is My Bosch Dishwasher Not Cleaning Properly?

What do you expect when you buy a Bosch dishwasher? It seems most of Bosch customers and dishwasher reviewers expect nothing but high quality! According to the Wirecutter, Bosch dishwashers have one of the lowest repair rates!

Still, it is important to keep in mind that even the sturdiest home appliances are subjects to wear and tear. Dishwasher faults are in fact often caused by the users, due to improper dishwasher use or the lack of maintenance and cleaning. In this article, we provide basic information on the diagnosis of your Bosch dishwasher. Some problems can be hard to diagnose and require a full disassembly of your dishwasher, while in some cases the solution can be right on the surface!

Possible Issues with Dishwashers

Warning! Unplug the power cord and turn off the water supply before attempting to repair your dishwasher! Keep in mind that there will still be residue water in the pipes in case you try to disassemble it!
Bosch dishwasher spray arm

Clogged Spray Arm

Your dishwasher may have one or two spray arms, depending on the model. Spray arms are connected to the water supply. Sometimes the food residue could clog the spray arms – either blocking the access of water or even preventing the arm from turning around entirely. We recommend ensuring that the spray arms are clean and can turn freely. Clean the mesh and the filter at the bottom of the dishwasher regularly, and carefully examine the lower spray arm as well.

Grey Bosch dishwasher spray arm

Obstructed Spray Arm

Alternatively, sometimes a large number of dishes loaded inside the dishwasher can prevent one of the spray arms from spinning. Make sure you do not put oversized items inside the dishwasher and make sure the spray arms can spin freely! One of the main signs of an obstructed spray arm could be a clunking sound after you start the dishwasher.

water inlet valve for a dishwasher

Water Inlet Valve

A water inlet valve controls the water supply in your dishwasher. A broken or damaged water valve can significantly affect its performance. You can locate the valve on the back of your dishwasher – right where the water pipe is attached to your appliance.

circulation pump for a dishwasher

Circulation Pump

Circulation pump uses an electric motor and an impeller for facilitating the water flow. A faulty pump may significantly hinder dishwasher’s ability to clean your dishes! Visually examine the pump and make sure there is no physical damage or burns. It is easier to replace the whole pump in case of a fault, however if your impeller is damaged you can always substitute it with a spare part.

Bosch dishwasher control board

Control Board

Unfortunately, sometimes a malfunctioning pump may be a result of a faulty control board. While this type of problem is not common, in case your control board is burnt or damaged you would have to replace it with a new part. Most of the time part replacement can be rather tricky.

Need Further Help?

Do you need further help with diagnostics or repair? Do you live in Denver, CO or within the Denver Metro area? Feel free to call us! We offer same and next day appointments in case you need to repair your dishwasher urgently!

Contact Us

Our professional repairman will be delighted to help you with your repair!