Seeing **HC4** on a Samsung dishwasher narrows the problem to **drying over-temperature / vent error**. What you do next depends on whether the code is an issue, a normal status/test message, or a model-dependent interpretation. Samsung appliances monitor whether a function reaches an expected state within a certain sequence. When that check fails, the control can store or display a code even though the root cause may sit elsewhere in the same circuit. The recorded display form is **HC4**. Search normalization stores it as **HC4** while preserving the characters a homeowner actually sees.
Reviewed by Ethan Mercer · Last reviewed August 17, 2026
Written by
Ethan Mercer Appliance Repair Content SpecialistPublished August 17, 2026Updated August 22, 2026Technically reviewed August 17, 2026
Content status:
Verified
Error codeHC4
ApplianceDishwasher
Quick answer
Drying over-temperature / vent error.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so HC4 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Seeing **HC4** on a Samsung dishwasher narrows the problem to **drying over-temperature / vent error**. What you do next depends on whether the code is an issue, a normal status/test message, or a model-dependent interpretation. Samsung appliances monitor whether a function reaches an expected state within a certain sequence. When that check fails, the control can store or display a code even though the root cause may sit elsewhere in the same circuit. The recorded display form is **HC4**. Search normalization stores it as **HC4** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
On affected Samsung dishwasher models, air movement may be weak, absent, noisy, or restricted.
On affected Samsung dishwasher models, cooling or drying performance can deteriorate as airflow drops.
One clue that supports the HC4 diagnosis is that a fan can scrape, stop, or run abnormally if ice, debris, lint, or a mechanical issue is present.
When the HC4 condition is present, hC4 appears during the dishwasher function associated with drying over-temperature / vent error.
While HC4 is active, the cycle may stop, drain, fail to fill/heat, or repeat a stage.
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
With HC4 recorded, clear user-accessible vents, filters, lint screens, or exterior airflow paths.
With HC4 recorded, listen for abnormal fan noise without removing live panels.
To rule out an accessible cause, check for visible frost, lint, debris, or a crushed external duct where relevant.
A safe owner-level check is to do not force frozen panels or reach into moving fan assemblies.
As an external check for HC4, record the code before resetting.
Before opening any service area, verify water supply, drain path/filter, door, detergent/suds, and visible leaks only when relevant.
Important safety warning. When working around a dishwasher that shows HC4, keep the checks external and non-invasive. Stop use for active leakage near electrical parts, burning smell, or repeated breaker trips. Do not defeat leak or door-safety switches.
Get help
When to request repair service
For HC4, the service threshold is straightforward: If airflow paths are clear but the fan-related code returns, the motor, feedback sensor, wiring, ice/defrost condition, or control may need testing. Bring the exact model number and a photo of the display so the diagnosis stays tied to the documented Samsung code.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
A single documented power reset can help after an external condition or power event is corrected. If **HC4** returns at the same stage, repeated resets only erase useful evidence and do not repair the cause.
Do not keep operating the appliance through a hazardous symptom just to see whether **HC4** clears. If there is heat, water, electrical, gas, or food-safety risk, stop and arrange diagnosis.
No. **HC4** tells you which condition or check the control detected. The same display can result from the named component, its wiring, a connector, a supply/airflow/water condition, or the control that reads it.
The same-looking code can be reused on another Samsung appliance family or reformatted by region/model year. Match the appliance type and exact model before applying a meaning. This page therefore keeps **Dishwasher HC4** separate from same-looking codes used by other Samsung appliance families.
