VERIFIED
Starch and grounds
Some foods are harder on a dishwasher than others. Rice and pasta swell and turn gluey, oatmeal sets like cement, and coffee grounds slip through the filter mesh and settle in the sump. If E34 turns up after a few of these loads in a row, the food itself is a prime suspect. Starch and fine grounds pass the mesh and collect in the sump, where the drain path begins.
What we can say
E34 has no confirmed single meaning on every Bertazzoni dishwasher, so no part is named here. When it follows messy, starchy dishes, the drain path is the practical first look, whether or not the code points there. A code that vanishes after the filter and sump are cleaned and does not return suggests the buildup was the cause; one that returns right away leaves the question open.
Cleaning the right spots
- Remove the filter and rinse off any paste with warm water.
- Wipe the sump area with a cloth, collecting grounds or rice by hand where it is reachable.
- Check the spray arm holes for tiny pasta shapes or seeds.
- Run a hot cycle with a cup of vinegar on the bottom rack to loosen film.
Better habits
Scrape pasta pots into the trash, not the dishwasher. Knock coffee filters and French press grounds into the bin first. Soak oatmeal pots in water before loading, because dried oatmeal will not dissolve in a wash.
It is fine to leave some soil on plates, but chunks should not go in.
The disposal angle
If your dishwasher drains through a disposal, run the disposal briefly with water before starting the cycle, which empties the trap of loose food waste. Do this when the dishwasher is not running, not during it. A drain hose that connects to a disposal inlet shares that trap, so food waste there can slow drainage too.
If the code stays
After a clean filter and a hot rinse, E34 that returns calls for testing of the drain pump and its sensing, with the machine open. Do not try to reach below the filter yourself, because starch can hide sharp fragments of broken glass or shells.
We diagnose first, write up an estimate, and replace nothing without your approval. Bring along what the last few loads contained.
What to mention
List the last few loads and any foods that went in without scraping. Mention how often you clean the filter, too. It sounds minor, but a filter that was last cleaned months ago and a code that appears after a pasta week is a story a technician can follow immediately.
If you found anything odd in the sump, such as shell or glass, keep it aside.
Frequently asked questions
They are fine and slip through mesh, collecting in the sump. A regular clean prevents buildup.
A cup on the bottom rack is commonly used. Do not mix it with bleach or other cleaners.
Scrape chunks, but a full rinse is not needed. A little soil helps detergent work.
Model compatibility: Bertazzoni reuses codes across series and model years, so E34 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
