My dishwasher takes a long time to finish the cycle. I have a residential dishwasher that is 4 years old. It has recently been running for over 4 hours to finish a wash cycle. I have cleaned the dishwasher out, checked that no components are broken, and replaced the filter. I am at a loss as to what is causing this. What can make a dishwasher run for many hours?
The average dishwasher wash cycle time is from 1 to 4 hours. This will always depend on what wash settings you have set and how dirty the dishes are. If your dishwasher is running for over 4 hours and taking longer than normal, see below for what to check to reduce the dishwasher wash time…
INCOMING WATER IS NOT AT PROPER TEMPERATURE
A dishwasher runs for too long because the incoming water is not HOT enough.
If the water entering the dishwasher is not at the proper temperature, the dishwasher will take longer to finish a wash cycle. This is because the dishwasher needs hot water to properly clean. The temperature should be from 120 to 150 degrees fahrenheit. Modern dishwashers sense the temperature and will hold until the proper temperature is reached. (When the dishwasher heating element is operating it takes 1 minute to heat the water by 1 degree) What Is The Recommended Water Temperature For A Dishwasher?
DISHWASHER CYCLE SETTING IS INCORRECT
Make sure you did not inadvertently set the dishwasher to a longer wash cycle. (See video below for more)
If the settings on the dishwasher have been set to HOT WASH or SANI WASH, this can add many minutes to the dishwasher washing time. If the dishwasher is running for too long, try setting the dishwasher on a faster setting.
Cycles of a Dishwasher
COLD WATER IS CONNECTED TO DISHWASHER
Check that the dishwasher is not hooked up to the cold water by mistake.
It is acceptable to hook the dishwasher to cold water but this will cause the dishwasher to run longer, it is always best to connect the dishwasher to HOT water from 120 to 150 degrees fahrenheit.
HOT WATER TAKES TOO LONG TO GET TO DISHWASHER
Run the hot water at the sink for 2 minutes or until the water is hot BEFORE starting the dishwasher.
Running the HOT water at the faucet near the dishwasher will supply the dishwasher with hot water faster. This supplies the dishwasher with hot water from the start of the wash and will greatly reduce the washing time.
HOME WATER HEATER TEMPERATURE 120F
Check that the temperature on your home water heater is at least 120F so the dishwasher receives hot water.
If needed, raise the temperature on your water heater by a couple degrees. This may assist the dishwasher by getting hotter water and finishing the wash cycle sooner. Be careful not to raise the temperature too high as scalding can occur. (Raising the water heater temperature is not recommended but may work in some instances) How to raise temp on water heater
DISHWASHER IS MISSING PADDED INSULATION
Check the padded tub insulation that surrounds the dishwasher frame, it needs to be intact to insulate and keep the heat inside.
To inspect the dishwasher padded tub insulation, you will need to slide the dishwasher out. Be careful of the water line when sliding out the dishwasher. If the insulation is missing or damaged, remove and replace.
HEATING ELEMENT IS FAULTY
Inspect the heating element in the dishwasher with an ohm meter to be sure it is not faulty.
If the incoming water is not hot enough AND the heating element has failed, the water will never get hot enough. Unplug the dishwasher and check the heating element for ohms using a multi-meter. If found faulty, remove and replace the dishwasher heating element. Replace Dishwasher Heating Element
Dishwasher Not Drying Dishes – How To Fix
HOME WATER PRESSURE ISSUE
Check the water pressure going to the dishwasher as it must be between 20 and 120 psi.
If the water pressure going to the dishwasher is not from 20 to 120 psi, the dishwasher will not operate properly. Water pressure below 20 psi will cause water supply valve failure and will prevent the water supply valve from turning off. A professional may be needed to find out your homes water pressure issue.
Dishwasher Running Too Long Troubleshooting Tips
Is your dishwasher still taking forever to finish a wash cycle? Please leave your problem below including the make and model number (EX: Samsung dishwasher Model DW80K7050) of your dishwasher and we will get back to you with help.