Bosch Dishwasher Error Code E46 — What It Means & How to Fix It

What Does This Error Mean?

The E46 error on a Bosch dishwasher indicates a problem with the drying fan. Some Bosch models (particularly newer ones with CrystalDry or AutoAir drying technology) use a fan to actively circulate air and improve drying performance. When the fan motor fails, draws unexpected current, or the speed sensor gives an incorrect reading, E46 is displayed. The dishwasher may still wash normally — but drying results will be poor until the fan is repaired.

Affected Models

SHPM88Z75N
SHPM98W75N
SHEM78ZH5N
SHXM98W75N
SHPM65Z55N
Bosch 800 and 800 Plus series with CrystalDry or AutoAir drying

Common Causes

Drying fan motor has seized or burned out from age or debris obstruction
Foreign object (food particle, broken glass, etc.) has jammed the fan blade
Wiring connector to the fan motor has come loose or is corroded
Fan speed sensor reporting incorrect speed data to the control board
Control board fan motor output circuit failure

How to Fix It

Run a cycle and listen for the drying fan. On Bosch models with active drying, the fan starts running during the drying phase (after the final rinse). A completely silent drying phase — or unusual grinding/buzzing — points to a fan issue.

The fan is quiet on most Bosch models. The easiest way to hear it is to open the door slightly during the drying phase — you should feel warm air movement.
Turn off power at the circuit breaker and access the drying fan. On most Bosch models, the fan is located in the door panel or at the base of the machine. Consult your model's service guide for the exact location.

The fan location varies significantly between Bosch models. AutoAir fans are often in the door; CrystalDry fans are typically in the base near the zeolite module.
Inspect the fan blade for obstructions. Check for food debris, broken glass, or other foreign material jammed in or near the blade. Remove any obstructions carefully.

A piece of broken glass near the fan is a common cause — always inspect very carefully and protect your fingers.
Spin the fan blade by hand. It should rotate freely with minimal resistance. A fan that is stiff, gritty, or locks up has failed bearings and needs replacement.

Also check the fan wiring connector. Disconnect and reseat it firmly. Corroded connectors in the moist door area are a known cause of E46.
Replace the drying fan assembly if it is seized, noisy, or tests as faulty. Reassemble, restore power, and run a full cycle including the drying phase to confirm E46 is cleared and drying performance is restored.

After repair, run 2 to 3 cycles with plasticware to verify drying performance — plastic items are the best indicator of effective drying.

When to Call a Professional

Drying fan replacement is accessible for confident DIYers but requires accessing the internal components. Fan assemblies cost $30 to $80. If replacing the fan does not clear E46, a technician can test the control board fan output circuit. Board replacement: $150 to $350.

Frequently Asked Questions

Which Bosch dishwashers have a drying fan?

Bosch models with AutoAir or CrystalDry technology have an active drying fan. These are primarily the 800 Series and 800 Plus Series. Older and lower-end Bosch models use condensation drying — they do not have a fan and will not show E46.

My dishes are coming out wet — is that E46?

Wet dishes after a cycle with E46 active is common. The drying fan's whole job is to improve drying performance. However, wet dishes can also be caused by low rinse aid levels, incorrect loading, or cool inlet water. Check those factors first before assuming the fan is responsible.

Can I run my Bosch dishwasher with E46 showing?

In most cases yes — the wash cycle completes normally. Only the active drying function is affected. You can use the dishwasher temporarily by opening the door slightly after the wash cycle to allow passive drying, while you arrange the fan repair.