Error code · Dishwasher

Samsung Dishwasher Normal and Heavy Lights Blinking: Thermistor Reading

Medium · inspection needed

Code: Blinking: Normal + Heavy
Appliance: Dishwasher
Brand: Samsung
Warranty: 30-day workmanship

What Blinking: Normal + Heavy means

Normal and Heavy blinking together on a Samsung dishwasher without a digital display means the thermistor is not operating correctly. The thermistor is the temperature sensor that tells the control how warm the water is. Light names can differ by model. With a reading it cannot rely on, the control stops the cycle. You may find the dishes washed in water that never warmed, or a cycle that ends early.

Common causes of Blinking: Normal + Heavy

Thermistor reading outside its normal range
Thermistor wiring and connection
Whether a power reset changes what the lights do

✓ One safe check you can try

1. Turn the dishwasher off, then cut power at the breaker for 30 seconds. 2. Switch it back on. 3. Fill the detergent drawer. 4. Run a Normal cycle. 5. If the lights blink again, call us. Tell us whether the dishes came out warm.

! Why to stop there

A reset cannot tell us whether the thermistor or its wiring is off.
We compare the reading with the true water temperature.
A written quote comes first, followed by 30 days of workmanship coverage.

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.

→Same appliance

Other Dishwasher codes

SRSamsung Dishwasher Code SR: Water Not Draining Out 1E / IE (rotary models)Samsung Dishwasher Code 1E / IE on Rotary Models: Heater Overheating Blinking: Heavy (without Express 60) / NormalSamsung Dishwasher Heavy or Normal Light Blinking: Leak Detected Blinking: Normal, Delicate + Quick / Normal, Delicate + Smart Auto / Normal, Quick+ + Smart Auto / Smart Auto, Normal + DelicateSamsung Dishwasher Normal Light Trio Blinking: Supply Water Too Hot Blinking: Normal, Heavy + Express 60Samsung Dishwasher Normal, Heavy and Express 60 Blinking: Thermistor Short Blinking: Normal, Heavy + Quick / Normal, Heavy + Smart AutoSamsung Dishwasher Normal, Heavy and Quick Lights Blinking: Low Water LC / LESamsung Dishwasher Code LC / LE: Leak Detected OC / 0C / oESamsung Dishwasher Code OC: Too Much Water

Blinking: Normal + HeavyBlinking: Normal + Heavy questions

What is a thermistor?

It is the sensor that reports water temperature to the control. If it reads wrongly, the control cannot manage the heating. We check it against the real water temperature during a test run.

How is this different from a short-circuited thermistor?

Both involve the same sensor. This pattern says it is not operating correctly, while another says it shorted. We test the sensor either way. The repair path is similar, but the readings we expect differ.

Should I wait before running it again?

We suggest waiting until the reading is checked. Hand washing is the safer choice until we test the sensor and its connection. That keeps dishes clean in the meantime.

Book a visit

Still seeing Blinking: Normal + Heavy?

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

(713) 561-5298