Bosch Dryer Error E24 — What It Means & How to Fix It

What Does This Error Mean?

E24 means the main electronic control board (PCB) in the Bosch dryer has detected a critical internal fault. Unlike E14 which covers general board errors, E24 typically indicates a more specific hardware failure — such as a relay, power component, or firmware corruption. Professional diagnosis is required.

Affected Models

Bosch WTW87565GB
Bosch WTH84000GB
Bosch WQB145B0GB
Bosch Serie 6 and Serie 8 Dryers
Bosch heat pump and condenser models

Common Causes

Power component on the main PCB has failed — relay, transistor, or voltage regulator
Firmware corruption on the control board — rare but possible after a power surge
A connected component (motor, pump, sensor) is drawing excessive current and damaging the board
Moisture or condensation reached the control board causing corrosion
Manufacturing defect in the control board — more common in the first year of use

How to Fix It

Unplug the dryer for 10 minutes to allow a full discharge, then restart.

Firmware errors occasionally clear with a full power reset. If E24 returns within one cycle, the board has a genuine hardware fault.
Check the dryer's warranty — E24 is a board fault that Bosch covers under warranty.

Contact Bosch with your model number and serial number. Bosch UK: 0344 892 8979. If the dryer is within the warranty period, repair or replacement should be at no cost.
If out of warranty, get a diagnostic visit before ordering a replacement board.

A technician can determine the exact failed component and whether a board repair (cheaper) or replacement (more expensive) is appropriate.

When to Call a Professional

E24 requires a Bosch authorised engineer — control board diagnosis and replacement is specialist work. A technician will confirm whether the board itself has failed or whether a connected component is the underlying cause. Replacing the board without fixing the root cause will result in E24 returning on the new board.

Frequently Asked Questions

What is the difference between E14 and E24 on a Bosch dryer?

Both E14 and E24 relate to the main control board, but they indicate different types of fault. E14 is a more general control board error — often triggered by software or a loose connection. E24 typically indicates a more specific hardware failure within the board itself. A technician with the Bosch service diagnostic tool can read the sub-code to identify the exact nature of the fault.