Bertazzoni Dishwasher Not Draining? Causes & Fix

Quick Answer: Why Your Bertazzoni Dishwasher Will Not Drain#

Most likely: the drain pump has failed or jammed, or the filter and sump are clogged with food debris blocking the water out. On these Italian-built Bertazzoni units the other common causes are a check valve stuck with mineral scale, a kinked or wrongly routed drain hose, or a control-board drain relay that no longer fires the pump. Standing water at the bottom of the tub is the giveaway. Because parts are proprietary and can take weeks to source, confirm the cause before ordering.

Likely Causes at a Glance#

Walking Through the Diagnosis#

These are premium, proprietary machines, so keep DIY to cleaning and the obvious mechanical checks, and record the model and serial from the plate inside the door before ordering any part. Note any code on the panel first, since Bertazzoni displays point at the failed system.

Start where the water leaves. Pull the lower spray arm and lift out the two-stage filter — a cylindrical fine filter that twists counterclockwise plus a flat coarse filter beneath it — and clear the food debris that packs the sump; a clogged filter alone can stop drainage, and it should be cleaned monthly. With the sump clear, check the drain pump: it uses a small motor and impeller to push water out at the end of each cycle, and it fails by seizing (hums but moves nothing), by a broken impeller (runs but no flow), or by a debris jam. Reach the pump from below or through the front kick panel and inspect the impeller for glass shards or broken blades; motor continuity should read in the single-digit-to-low-tens of ohms.

If the pump and filter are clear, look at the check valve, which stops dirty drain water from flowing back into the tub. Hard-water scale builds on its flap and can hold it shut so nothing drains — remove it and soak it in white vinegar for about thirty minutes to dissolve the deposits, and replace it if the rubber flap is warped or torn, since a stuck-closed valve mimics a dead pump. Then the drain hose: it must rise in a high loop to the underside of the counter before dropping to the drain or disposal, or water will not clear; disconnect both ends and flush it for kinks or a collapse, and make sure the disposal knockout plug was removed if it drains through a disposal. Last, if the pump never even runs at the drain step, suspect the control-board drain relay — power-cycle at the breaker for ten minutes, and if the fault returns immediately the board has a hardware failure.

Repair or Replace? The Short Version#

Rule of thumb: given the high replacement cost of a Bertazzoni, repair is almost always the economical choice — a filter clean is free, and a pump, check valve, or hose is a targeted part. The catch is sourcing: Italian components can take two to four weeks through authorized distributors, so confirm the exact part against your model first. Our technicians service Bertazzoni built-ins and handle the parts sourcing — book a repair.

Frequently Asked Questions#

What is the first thing to check when a Bertazzoni will not drain?#

The filter and sump. Pull the lower spray arm, lift out the two-stage filter, and clear the food debris — a clogged filter alone can stop drainage, and it should be cleaned monthly.

How do I know if it is the pump or the check valve?#

A pump that hums but moves no water is seized or jammed; a check valve stuck shut with scale blocks flow while the pump runs normally. Inspect the pump impeller for debris, and soak a scaled check valve in vinegar.

My Bertazzoni pump runs but water still will not leave — why?#

Look downstream: a check valve held shut by mineral scale, or a kinked or non-looped drain hose, will trap water even with a working pump. Clean or replace the valve and confirm the hose rises in a high loop before the drain.

Are Bertazzoni parts hard to get?#

They can be. As a smaller Italian brand, proprietary components may take two to four weeks through authorized distributors, so confirm the exact part against your model and serial before ordering.