Dishwasher Making Grinding Noise. Sometimes your dishwasher makes this crazy grinding noise, and you may be worried something is breaking.
But if it’s a popcorn kernel stuck in the chopper blade area, it could just be that. Other times your dishwasher makes this disturbing thumping noise, but if it’s the drain line vibrating against the cabinet, then all is well.
The wash pump, wash motor, or drain pump may make loud noises when they break and will need to be replaced by a professional.
Dishwasher Making Grinding Noise
If a dishwasher is making loud grinding noises, it’s possible that pieces of food particles, hard objects or other large items could have gotten stuck inside the motor of the appliance.
Noisy dishwasher parts
Here are the handful of culprits we think might be causing the sound. Between any number of parts that might be misfiring, there are only five major parts to worry about having to replace. And they can all be replaced by an efficient home improvement warrior.
Circulation pump malfunctions
Similar to a garage’s drain pump, the circulation pump will simply wear out over time.
These pumps simply cannot be replaced individually and one must therefore use a new circulation pump in order to rectify the problem.
Deficiency of drain pump
Your drain pump may be worn out and its bearings can’t handle food debris from the sink or disposal any longer.
Cleaning any debris that is in the pump itself may improve performance, but it’s likely that you will need to replace the pump. We can take care of this for you.
Deficiency with drain valve solenoids
The sound of a buzzing drain valve is a strong indication that the part has failed. A drain valve kit available for purchase will allow you to replace just the drain valve itself.
But it will also allow you the ability to put a new plunger on your actuator lever so that you can experience some freshness once again.
Almost all dishwashers come with an impeller and pump combination to propel and drain water, respectively.
If the impeller is broken or has come loose from its housing during a cycle, you may hear a scraping or squeaking sound.
Sometimes, depending on your dishwasher model, the impeller and pump can be replaced independently of one another.
The water inlet valve is worn out
When the inlet valve is filled with water, there are multiple sound waves being generated. A normally functioning valve can synchronize these sound waves to reduce vibrations and create a more pleasant sound.
When the diaphragm inside the inlet valve deteriorates, other vibrating parts located close by may resonate out of control, creating a loud buzzing or whistling noise that is easily heard.
Since worn inlet valves cannot be easily or successfully repaired, we recommend replacing the valve altogether as it will solve this problem permanently without causing further issues later on.