Error code · Dryer

Whirlpool Dryer Code tS: Thermistor Reading Out of Range

Medium · inspection needed

Code: tS
Appliance: Dryer
Brand: Whirlpool
Warranty: 30-day workmanship

What tS means

The tS code on Whirlpool WED / WGD electric and gas dryers, Cabrio and Duet included, shows a problem with the thermistor, meaning the temperature sensor is not reading correctly. On a vented, non-heat-pump model, the likely cause is a clogged lint screen or a blocked or restricted vent going outside the home. Airflow affects what the sensor reads. You may notice long dry times, a dryer that stops early, or damp clothes after a full cycle.

Common causes of tS

Lint screen and vent run blocked or restricted
Outside exhaust hood clogged
Thermistor reading and its connector
Wiring between the sensor and the control

✓ One safe check you can try

1. Clean the lint screen. 2. Check the vent from the dryer to the wall for crushes, kinks and lint. 3. Verify the outside vent and exhaust are clean, as ample air flow is needed for proper dry time. 4. Run a timed dry cycle. 5. If tS returns, schedule service.

! Why to stop there

An airflow problem and a sensor that reads wrong look alike on the display
We measure the thermistor and check the vent run
The price is in writing first, and an older dryer gets an honest repair-value comment

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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tStS questions

What is the thermistor on my dryer?

It is a temperature sensor the control reads to manage heat. The tS code means those temperatures are not reading correctly, so the dryer may stop or dry poorly.

Can a dirty vent cause tS?

It can. Restricted exhaust changes the temperatures the sensor sees, so clearing the lint screen, vent and outside hood is the first thing to do. If tS stays, the sensor circuit needs a test.

Is tS the same as hE?

They are cousins. hE describes a heating error with temperatures too low or too high, and tS points to the thermistor reading. The vent checks overlap, and the technician tests differ.

Book a visit

Still seeing tS?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107