Click to enlarge

🔧 Common faults and what they mean

E1 – Evaporator temperature sensor fault

Symptoms

• Dehumidifier runs but defrosts frequently

• Stops approx. every 20 minutes

• Defrost cycle may last up to 8 minutes

Cause

• Faulty evaporator temperature sensor

• Or loose connection

Quick test

• Turn off and unplug for 1 minute

• Restart the unit

• If E1 remains → sensor needs replacement

👉 Usually a relatively inexpensive spare part.

E2 / E3 – Humidity or temperature sensor fault

Symptoms

• Runs continuously

• Does not stop automatically

• Ignores set humidity level

Cause

• Faulty hygrostat (humidity sensor)

• Faulty temperature sensor

Result
The unit keeps dehumidifying constantly.

Solution

• Sensor typically needs replacement

• Often located near the air intake

EE – Refrigerant leakage

The most serious fault.

Symptoms

• Compressor starts

• No dehumidification

• Or stops quickly

• Error code EE

Cause

• Leak in refrigerant circuit

• Loss of refrigerant

Reality
👉 Often not economical to repair on small domestic units.

Usually only worth repairing if:

• Large industrial model

• Still under warranty

🧰 5 most common faults (no error code)
In practice, these are seen most often:

Faulty compressor capacitor
– Unit won’t start
– Humming sound
– Very common

Clogged filter / dust
– Poor performance
– Icing

Fan not running
– No airflow
– No dehumidification

Frost on evaporator
– Sensor or temperature issue

Full water tank sensor
– Unit thinks tank is full
– Will not start

🔎 Quick troubleshooting (before disassembly)

• Unplug power for 2 minutes

• Check filter

• Check fan operation

• Check if compressor gets warm

• Check for ice on coil

This solves about 50% of cases.

❓ Questions
Is it a:

• Small household dehumidifier

• Güde model

• Or large workshop unit?

What exactly does it do?

• Starts → stops

• Fan only

• Error code on display

• Smell of refrigerant

• No effect

Describe the symptoms – the fault can often be identified quite precisely.

🔩 Typical spare parts

• Humidity sensor (hygrostat)

• Temperature sensor (evaporator/room)

• Control board / PCB

• Fan motor

• Compressor start capacitor

• Compressor relay/overload protector

• Float switch / full-tank sensor

• Air filter

• Condensate pump (if fitted)

• Display/control panel

• Power switch or power cable

We stock the most commonly requested spare parts.
Please state model and spare part number when enquiring.