Samsung Galaxy S25 Ultra keeps showing a moisture warning?
A moisture warning is a reason to stop cable charging. If it persists after the device and connection are dry, we can assess the socket, contamination and charging behaviour before proposing repair.
The fixed £35 diagnostic covers the assessment described below and both-way UK tracked shipping. If you approve the repair quote, the fee is deducted from that quote. No repair work starts without your approval.
Model-specific context
A protective warning does not prove one component has failed
Samsung's moisture detection can prevent USB charging when the connection is wet. A repeated message needs the exposure history: describe humidity, a spill or a wet cable, and whether the warning occurs with every cable. This assessment page does not claim the S25 Ultra has a model-wide defect or that a warning always means internal liquid damage.
For the wider fault pattern, read the Phone charging-fault assessment. If the files matter more than returning the device to daily use, read about data recovery and select Data recovery when booking.
The symptom
Tell us when the warning appears
The sequence helps determine whether further inspection is appropriate:
- A warning remains after the connection has had time to dry naturally
- The warning returns with different dry cables
- Charging trouble or other symptoms developed after a spill
What the diagnostic checks
What we check on your Samsung Galaxy S25 Ultra.
- Inspect the USB-C socket and device condition for contamination or damage
- Compare the reported warning with charging behaviour when safe to test
- Assess connector and board paths if the persistent fault requires internal investigation
We’ll explain what we find in writing and quote for the work we can offer. Your options depend on the device’s condition, our test results and the parts available.
What to note about a warning that returns
Record whether the warning appears with every cable, whether there was actual liquid exposure and whether it changes after the device has dried according to Samsung's guidance. A warning that disappears and returns is useful history. It does not by itself establish that the moisture-detection circuit is defective.
When to stop trying charging workarounds
If there is visible corrosion, unusual heat, physical damage or recent liquid exposure, stop applying power and contact support. Avoid inserting objects, using heat or attempting to defeat the warning. The assessment can distinguish contamination and damaged connections from a fault further along the charging path.
Before you post it
Protect the device and the data while deciding.
- Unplug the cable and allow the connection to dry naturally
- Do not bypass the warning, insert metal objects or apply external heat
- Contact support before posting if there are wider liquid symptoms, unusual heat or battery swelling
Get a clear diagnosis for your Samsung Galaxy S25 Ultra.
Tell us what’s happening with your Samsung Galaxy S25 Ultra. We’ll assess it at our Tyneside lab for £35 and explain your options before you decide on repair.
Drying, cleaning and repair are different outcomes
A temporary warning may clear without internal work. Persistent contamination or physical damage may need assessment. We explain what was found and quote any viable repair; a moisture warning alone cannot establish the price or the damaged part.
Common questions
Samsung Galaxy S25 Ultra moisture detected FAQ
Does moisture detected always mean the phone was submerged?
No. The connection and its environment matter, including a damp cable or humidity. The message is not proof of the extent of internal damage.
Should I override the warning to charge the phone?
Do not force cable charging while the warning remains. Disconnect it, follow Samsung's drying guidance and contact support if the message persists.
Does every persistent warning need a charging-chip replacement?
No. The socket, contamination and connections should be assessed before attributing the symptom to a board component. The report explains what testing supports.
Related services and guides
More help with this fault.
- Phone charging-fault assessment
- Why liquid-related symptoms can be misleading
- Charging diagnosis before parts replacement
- Repair by model
Model information: Samsung moisture-warning guidance · Samsung S25 specifications. These sources describe the device or manufacturer guidance; the assessment establishes the fault in yours.
BASED IN TYNESIDE · SERVING THE UK
Specialist repair by post across the UK.
You can send your device to our Tyneside lab from anywhere in England, Scotland, Wales or Northern Ireland. Book first and we’ll email your tracked postage label and packing instructions. Our service is by post; there is no walk-in counter.
The £35 assessment includes standard UK tracked postage both ways. We’ll explain what we find in a written report and give you a quote. You decide whether to go ahead. The assessment is non-refundable and counts towards approved work. Read the assessment fee terms and packing instructions, or ask us about your device if you’re unsure where to start.