mypros+
Error code reference

Bosch Dryer Error Code E:92

Power supply

Bosch codesBosch dryer codes

Power supply - line voltage too low or too high, or window opened while process running (Error). May appear instead of E:16/E:8031 in models with ADPU Power Unit.

First step from the service manual

Check mains voltage using measuring device with memory card.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for E:92.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What E:92 means on a Bosch dryer

Error code E:92 on a Bosch dryer signals a power supply fault. The control board has detected that incoming line voltage is outside the acceptable operating range, either too low or too high, or a door or process window was opened while a cycle was actively running. This error falls under the power monitoring functions of the dryer's control system and is designed to protect internal components from operating under abnormal electrical conditions.

In models equipped with the ADPU Power Unit, E:92 may appear in place of the related codes E:16 or E:8031, which are the standard fault codes for line voltage anomalies on other platforms. The ADPU Power Unit monitors incoming mains voltage continuously during operation. When the measured voltage deviates from the rated supply window, the unit logs the fault and halts the cycle. The same error triggers if the door or access window is opened mid-cycle, interrupting the process before completion.

Diagnosing this code requires checking the actual mains voltage at the outlet or terminal block using a measuring device equipped with a memory card, which allows voltage fluctuations over time to be captured rather than just a snapshot reading. A single steady reading may appear normal while intermittent drops or spikes go undetected. If voltage is confirmed stable and within specification, the fault may point to a faulty ADPU Power Unit that is incorrectly reading supply voltage, or to a door latch or interlock switch that is signaling an open state during operation.

Source: manufacturer service documentation.

Common causes of E:92

  1. 01

    Mains voltage out of range

    Wiring / connection

    The incoming line voltage at the wall outlet or terminal block is fluctuating above or below the dryer's acceptable operating range. This can be caused by utility supply issues, shared circuits with heavy loads, or undersized wiring.

  2. 02

    Door or window opened mid-cycle

    Wiring / connection

    The dryer's control system registered an open door or access window while a cycle was in progress. Check that the door is fully latching and that the door interlock switch is functioning correctly.

  3. 03

    Faulty door latch or interlock switch

    Part replacement

    Even if the door appears closed, a worn or broken latch mechanism or a failing interlock switch can send a false open-door signal to the control board during operation, triggering E:92.

  4. 04

    Faulty ADPU Power Unit

    Part replacement

    In models with the ADPU Power Unit, the unit itself may be misreading supply voltage and triggering the fault even when mains voltage is within specification. If voltage checks out normal, the ADPU Power Unit is a likely suspect.

  5. 05

    Intermittent supply voltage drop

    Wiring / connection

    A voltage sag that occurs only under load or at certain times of day will not show up on a standard single-point meter reading. Using a measuring device with a memory card function is necessary to capture these transient events.

See the test procedure for each cause

Frequently asked questions about E:92

What does E:92 mean on a Bosch dryer?
E:92 indicates that the dryer's control system has detected a power supply fault, specifically that the incoming line voltage is too low or too high, or that a door or process window was opened while a cycle was running. On models equipped with the ADPU Power Unit, this code replaces the related E:16 or E:8031 codes. The dryer halts the cycle to prevent damage to internal components.
How do I fix error code E:92 on a Bosch dryer?
Start by checking the mains voltage at the outlet or terminal block using a multimeter with a memory card function to capture any fluctuations over time. Confirm the door is latching fully and that nothing is obstructing it. If voltage is normal and the door is secure, the fault may lie with the door interlock switch or the ADPU Power Unit, which may require professional diagnosis and part replacement.
Will resetting the dryer clear the E:92 error?
A reset may temporarily clear the E:92 code, but if the underlying cause, such as unstable mains voltage, a faulty door switch, or a defective ADPU Power Unit, is not resolved, the error will return. Clearing the code without fixing the root cause does not make the dryer safe or reliable to operate.
Is it safe to use my Bosch dryer when it shows E:92?
You should not continue running the dryer while E:92 is active. The error indicates either an abnormal power supply condition or an open door state, both of which can pose safety risks or cause damage to the dryer's components. Resolve the fault before resuming use.
How much does it cost to repair a Bosch dryer with error code E:92?
Repair costs vary depending on the cause. If the issue is with the home's electrical supply, electrician fees can range from around 100 to 300 dollars or more depending on the work needed. Replacing a door interlock switch typically costs between 50 and 150 dollars in parts and labor. Replacing the ADPU Power Unit is a more involved repair and parts plus labor can range from 150 to 400 dollars or higher depending on the service provider and part availability.

Related Bosch dryer codes

All Bosch dryer codes
View all 94 Bosch dryer codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass