Err4
What code Err4 means on a Haier washing machines, what causes it, and which part to check first.
● SEVERITY: MEDIUM
Haier Err4 means: Overflow condition detected too much water in the drum. The documented cause is: Excessive foam from too much detergent (most common cause). Wrong type of detergent (standard detergent in an HE machine). Inlet valve stuck open allowing continuous fill. Pressure sensor fault.
What Err4 means
Overflow condition detected too much water in the drum
The display shows Err4 and the machine stops until the fault is cleared.
What the technical documentation says
Causes documented in the technical source published by whitegoodshelp.co.uk
| DOCUMENTED CAUSE OR CHECK |
|---|
| Excessive foam from too much detergent (most common cause). Wrong type of detergent (standard detergent in an HE machine). Inlet valve stuck open allowing continuous fill |
| Pressure sensor fault |
| Pressure switch hose blocked |
Replacement parts
Tools you'll need
Before you open anything
Unplug the machine and close the water tap before removing any panel. Water and mains electricity sit centimetres apart inside a washing machine. If the drum still holds water, drain it from the filter first — it can be scalding.
What to check, in order
From the quickest check to the one that needs a technician.
Find a specialist
TroubleAtlas Pro
TroubleAtlas Certified
What is the TroubleAtlas Score?
Beyond fault codes and specialists, we rate the reliability of appliance brands and models — a transparent score that owes nothing to the manufacturer. The reference to check before you buy or repair.
See all appliance scores →TA YouTube Channel
Frequently asked questions
What does Err4 mean on a Haier?
Overflow condition detected too much water in the drum The documented cause is: Excessive foam from too much detergent (most common cause). Wrong type of detergent (standard detergent in an HE machine). Inlet valve stuck open allowing continuous fill. Pressure sensor fault. Pressure switch hose blocked.
Can I fix Err4 myself?
It depends on the part involved: Excessive foam from too much detergent (most common cause). Wrong type of detergent (standard detergent in an HE machine). Inlet valve stuck open allowing continuous fill. Pressure sensor fault. Pressure switch hose blocked. Clearing a filter or straightening a hose is within reach of anyone; anything behind a panel means mains electricity and water together — that is a job for a technician.
Does Haier use other codes on this appliance?
Yes: we document 14 other codes for Haier on this washing machines. They are listed at the bottom of this page, each with its own meaning.
Does the same code mean the same thing on other brands?
Often not. The same two characters can point to completely different faults depending on the manufacturer — always check the page for your own brand.