Samsung Dryer Error Code tO: Meaning, Checks & Repair
If a Samsung dryer shows **tO**, the verified Samsung meaning in this research set is **temperature / temperature-sensor error**. Use the code to narrow the diagnosis, then confirm the exact model because code scope can change by product generation or region. 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 **tO**. Search normalization stores it as **TO** 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 codeTO
ApplianceDryer
Quick answer
Temperature / temperature-sensor error.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so TO 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
If a Samsung dryer shows **tO**, the verified Samsung meaning in this research set is **temperature / temperature-sensor error**. Use the code to narrow the diagnosis, then confirm the exact model because code scope can change by product generation or region. 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 **tO**. Search normalization stores it as **TO** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
The tO display becomes more meaningful if the control can stop or limit operation because a temperature reading is missing or implausible.
Depending on the exact model, heating, cooling, drying, or defrost behavior can become inconsistent.
While tO is active, the display may return at a similar stage each time the affected sensor is checked.
The tO display becomes more meaningful if tO appears and drying may pause or performance may change because of temperature / temperature-sensor error.
The tO display becomes more meaningful if heat, airflow, motor, drainage, door, or sensor behavior can be affected depending on the code family.
Why it happens
Possible causes
varies by model/region — cross-region baseline — Temperature / temperature-sensor error
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
The next non-invasive check is to record when the code appears and whether the appliance had just heated, cooled, or defrosted.
Before opening any service area, confirm vents, doors, filters, and ambient conditions are normal where they affect the sensor reading.
As an external check for tO, use the exact model manual before assuming the sensor itself is defective.
The next non-invasive check is to record the code and whether the dryer is vented or heat-pump/ventless.
The next non-invasive check is to clean/inspect lint filter, heat exchanger, water tank/drain, and external vent only when relevant.
A safe owner-level check is to stop repeated resets if the code reappears; model-specific electrical/refrigeration diagnosis can be required.
Important safety warning. Stop for burning smell, smoke, gas odor, repeated breaker trips, or abnormal overheating. Do not bypass thermal protection. Do not bypass a safety device merely to see whether tO disappears.
Get help
When to request repair service
If the owner-accessible checks do not clear tO, Persistent temperature-sensor codes usually require resistance/connection checks at the sensor, harness, and control—work best done with the model-specific service procedure. The repair should confirm the monitored function and its feedback before any board or component is condemned.
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 **tO** returns at the same stage, repeated resets only erase useful evidence and do not repair the cause.
Continue only if the appliance is otherwise safe and the owner-level checks are appropriate. Stop for leakage near electrical parts, smoke, burning odor, arcing, gas concerns, repeated breaker trips, uncontrolled heating, or unsafe temperatures.
Treat **tO** 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 tO** separate from same-looking codes used by other Samsung appliance families.
