Bosch Dryer Error E14 — What It Means & How to Fix It

What Does This Error Mean?

Error E14 means the control board (PCB) in the Bosch dryer has detected a fault or has failed. The control board is the brain of the dryer — it controls every function, motor, and sensor. E14 almost always requires a technician to diagnose whether the PCB needs repair or replacement.

Affected Models

Bosch WTW87565GB
Bosch WTH84000GB
Bosch WQB145B0GB
Bosch WTW876H0GB
Bosch Serie 8 Heat Pump Dryer

Common Causes

Control board has developed an internal component fault
Power surge has damaged the PCB's microprocessor or relay circuits
Moisture ingress has caused corrosion on the control board
A connected component (motor, sensor) is drawing too much current and damaging the board
Firmware error or corruption on the control board

How to Fix It

Unplug the dryer from the power socket and wait 5 minutes for the control board to fully discharge.

A transient firmware error sometimes clears after a full power drain — plug back in and try again.
If E14 disappears after the power cycle, run a short test cycle and monitor for recurrence.

If E14 returns during the test cycle, the PCB fault is real and requires professional diagnosis.
Check all visible wiring connectors on the control board for loose pins or signs of burning or corrosion.

A loose connector to the control board can trigger E14 — gently reseat any loose connectors.
Check the area around the dryer for signs of moisture or condensation that may have reached the PCB.

Dryers installed in damp utility rooms or garages are prone to moisture ingress affecting the PCB.
Check your dryer's warranty status — Bosch's standard warranty covers PCB faults.

Contact Bosch customer service with your model number and describe E14 to arrange a warranty repair.
If out of warranty, get a diagnosis from a Bosch authorised engineer before ordering a new PCB.

A faulty motor or sensor causing the PCB to fault means replacing the PCB alone will not fix the problem.

When to Call a Professional

E14 is a critical fault that requires a qualified technician — PCB diagnosis and replacement is not a DIY repair. A technician can determine whether the PCB is truly faulty or if a connected component is causing the board to fault. PCB replacement costs $200–$450 depending on the model — compare this against the dryer's age and replacement cost.

Frequently Asked Questions

How can I tell if E14 is a PCB fault or a connected component causing the board to fault?

A technician uses diagnostic tools to read fault logs and test each connected component. If only the PCB error appears with no other codes, the board itself is likely faulty. If other error codes also appeared before E14, the connected component those codes refer to may be overloading the board.

Can a power surge cause Bosch dryer E14?

Yes — power surges are a common cause of PCB damage as they can burn out transistors and relay circuits. Always use a quality surge protector with your dryer to prevent this. If you experienced a power outage or storm before E14 appeared, surge damage is the likely cause.

Is it worth repairing a Bosch dryer with E14?

It depends on the dryer's age and the repair cost. If the dryer is under 5 years old and the PCB repair is under $300, repair is usually cost-effective. For dryers over 8 years old where PCB replacement approaches $400+, a new dryer may be more economical.