What tC Means
tC is a dry-cycle temperature error on Samsung’s WD53DBA900H-series Bespoke AI Laundry Combo service manual: the duct thermistor and discharge thermistor, which read the drying air temperature, are reporting a resistance well outside their expected range. Samsung’s step starts with the lint and airflow path rather than the sensors themselves.
Common Causes of tC
- Lint filter or drying air path restricted
- Duct thermistor or discharge thermistor reading open or shorted
- Loose connector at either thermistor
🔧 One Safe Check You Can Try
With the Laundry Combo off and cool, clean the lint filter and its housing thoroughly, since this is a ventless heat pump dryer and a blocked filter affects the whole drying air path. Restart a cycle once the filter is clean. If tC returns with a clean filter, the duct or discharge thermistor needs a technician’s resistance test.
⚠ Why You Shouldn't Go Further Than That
- These thermistors sit in the sealed drying air path alongside the heat pump; testing their resistance means the cabinet open and a meter on the connector, not an owner check.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.