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Error code · Dishwasher

Monogram ZBD9900 Dishwasher Code NORMAL Light Flashing: thermistor reading out of range

Monogram ZBD9900 top-control dishwashers, such as the ZBD9900RII, use the NORMAL light flashing to report a thermistor problem in the technician's service test. The thermistor reading either stopped or went above 175 degrees Fahrenheit, and the…

Medium · inspection needed
Schedule Service(713) 955-0955
Code
NORMAL Light Flashing
Appliance
Dishwasher
Brand
Monogram
Warranty
30-day workmanship

What NORMAL Light Flashing means

Monogram ZBD9900 top-control dishwashers, such as the ZBD9900RII, use the NORMAL light flashing to report a thermistor problem in the technician's service test. The thermistor reading either stopped or went above 175 degrees Fahrenheit, and the program continues anyway. This is not something the owner sees on the panel. What the owner may notice is a wash that seems cooler or hotter than usual. The reading is confirmed for the ZBD9900 series, not for other Monogram models.

Common causes of NORMAL Light Flashing

  • Thermistor and its connector
  • Wiring between the thermistor and the control
  • Main control input for the temperature circuit
✓ One safe check you can try

1. Let the cycle finish before opening the door, since the water can be very hot. 2. Check that dishes are not blocking the lower spray arm. 3. Rinse the filter under the tap and put it back. 4. Run one more normal cycle and note the result. 5. Call us if the dishes keep coming out poorly cleaned.

! Why to stop there
  • The owner has no way to see the thermistor reading
  • We check the thermistor value against known resistance at the water temperature
  • A wiring or connector problem can mimic a bad thermistor
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

AUTO + SPEED Lights FlashingMonogram ZBD9900 Dishwasher Code AUTO + SPEED Lights Flashing: turbidity sensor reading uncertain START/RESET Light FlashingMonogram ZBD6800 Dishwasher Code START/RESET Light Flashing: cycle canceled, tub draining AUTO Light FlashingMonogram ZBD9900 Dishwasher Code AUTO Light Flashing: water is not heating up HEAVY Light FlashingMonogram ZBD9900 Dishwasher Code HEAVY Light Flashing: too much water inside the tub LIGHT Light FlashingMonogram ZBD9900 Dishwasher Code LIGHT Light Flashing: the tub is not filling SPEED Light FlashingMonogram ZBD9900 Dishwasher Code SPEED Light Flashing: inlet valve leaking through RINSE Light FlashingMonogram ZBD9900 Dishwasher Code RINSE Light Flashing: pressure sensor signal reads high AUTO + HEAVY Lights FlashingMonogram ZBD9900 Dishwasher Code AUTO + HEAVY Lights Flashing: water will not drain
NORMAL Light FlashingNORMAL Light Flashing questions
Does the dishwasher still work with this reading?

Yes, the program continues. The control just does not have a trustworthy temperature, so heating and sanitizing results on your ZBD9900 may not match what the cycle promises.

Where does the flashing show?

In the service test only, where our technician reads it. You will not see this one on the display during a normal wash. Nothing about it is visible to you while the dishwasher runs.

Could the dishes be unsafe?

If the water is not reaching proper temperature, grease and food residue may stay. Rewash a load that looks dirty and let us check the sensor circuit.

Book a visit

Still seeing NORMAL Light Flashing?

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

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