The **Clg** display on a Samsung dryer points to **vent blockage detected**. Treat it as a diagnostic direction rather than a parts order: operating conditions, wiring, sensors, actuators, and control electronics can overlap. 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 **Clg**. Search normalization stores it as **CLG** 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 codeCLG
ApplianceDryer
Quick answer
Vent blockage detected.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so CLG 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
The **Clg** display on a Samsung dryer points to **vent blockage detected**. Treat it as a diagnostic direction rather than a parts order: operating conditions, wiring, sensors, actuators, and control electronics can overlap. 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 **Clg**. Search normalization stores it as **CLG** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
One clue that supports the Clg diagnosis is that the display appears while the appliance is otherwise able to respond normally.
A symptom that fits Clg is that the message may be tied to a mode, test, reminder, setup state, or protective condition rather than a failed part.
On affected Samsung dryer models, normal operation can resume after the documented mode or condition is cleared.
A symptom that fits Clg is that clg appears on the display while the appliance reports: Vent blockage detected.
Why it happens
Possible causes
varies by model/region — cross-region baseline — Vent blockage detected
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
To rule out an accessible cause, confirm the exact display characters and appliance model before treating the message as an issue.
Before requesting service for Clg, check the user-facing setting, mode, door, filter, container, or setup condition named by Samsung for this display.
With Clg recorded, use the model-specific manual to clear the status; avoid repeated resets if the message returns unexpectedly.
Before requesting service for Clg, record the code and whether the dryer is vented or heat-pump/ventless.
For Clg, start by doing this: clean/inspect lint filter, heat exchanger, water tank/drain, and external vent only when relevant.
With Clg recorded, stop repeated resets if the code reappears; model-specific electrical/refrigeration diagnosis can be required.
Important safety warning. When working around a dryer that shows Clg, keep the checks external and non-invasive. Stop for burning smell, smoke, gas odor, repeated breaker trips, or abnormal overheating. Do not bypass thermal protection.
Get help
When to request repair service
Service is not automatically required. Request diagnosis only if the status cannot be cleared as designed or normal operation does not resume. If Clg keeps returning, record the stage at which it reappears so the technician can test the vent blockage detected path instead of replacing parts by guesswork.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
One controlled restart is reasonable after correcting an obvious external issue. A recurring **Clg** display should be treated as diagnostic evidence, not as a reason to keep rebooting the appliance.
Because **Clg** is not treated here as a conventional component failure, service is not automatically required. Clear or complete the documented mode and confirm that normal operation resumes.
Treat **Clg** as a starting point, not a replacement instruction. Wiring, feedback signals, operating conditions, and electronic controls can mimic a failed component.
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 **Dryer Clg** separate from same-looking codes used by other Samsung appliance families.