Quick diagnosis
What this code is telling you
Most likely trigger
lint buildup in exhaust duct
Recommended replacement
Dryer Vent / Transition Duct
Diagnostic path
4 ordered checks
Part fit
Exact model number required
Safety first
Before opening the appliance
Stop using the dryer if airflow is severely restricted. Lint buildup in a dryer exhaust system can create a fire hazard.
Read the full safety disclaimerRoot cause
Why the control reported this error
C80 indicates that the dryer vent-blockage test detected roughly an 80 percent airflow restriction because lint buildup in exhaust duct. crushed or kinked transition duct and blocked exterior vent hood can produce the same code, so verify the fault before replacing components.
Symptoms
What you may notice
- ✓Long drying times
- ✓Dryer feels unusually hot
- ✓C80 appears after vent test
Possible causes
Check the most likely causes first
- 1
lint buildup in exhaust duct
Start here when it matches your symptoms.
- 2
crushed or kinked transition duct
- 3
blocked exterior vent hood
Diagnostic sequence
Work through these checks in order
Stop when you find the fault. Do not perform a step that requires skills or live testing you are not qualified to do.
- 1
Check 1
Clean the lint filter.
- 2
Check 2
Disconnect the dryer from power and inspect the transition duct for crushing or kinks.
- 3
Check 3
Clean the exhaust duct to the exterior and confirm the outside flap opens freely.
- 4
Check 4
Repeat the vent-blockage test after cleaning.
Recommended next step
Troubleshoot before buying a part
This code does not point to a replacement part as the first action.
Follow the diagnostic sequence above first. Supply problems, maintenance conditions, settings, airflow restrictions, or temporary control states can often trigger this code without a failed component.
If the code returns after the listed checks, use the complete model number and manufacturer documentation before ordering anything.
Common questions
Quick answers for this fault
What should I check first for C80?
Start with lint buildup in exhaust duct. If that checks out, continue through the diagnostic sequence above rather than replacing a part based on the code alone.
Do I need to buy a part for C80?
Usually not as the first step. This code is commonly tied to a setting, supply issue, maintenance condition, airflow restriction, or temporary operating state. Complete the diagnostic checks before considering parts.
When should I stop troubleshooting C80 myself?
Stop if the next step requires live electrical testing, sealed-system work, gas or combustion service, or any procedure outside your training. Stop using the dryer if airflow is severely restricted. Lint buildup in a dryer exhaust system can create a fire hazard.
Manufacturer reference
Verify against the official support source
FixCodeDB summarizes the fault in plain language. For model-specific instructions, confirm the guidance with the manufacturer and your appliance manual.
Samsung Dryer Error Codes — Samsung Support →Was this useful?
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