Monogram ZBD9900 Dishwasher Code AUTO Light Flashing: water is not heating up
On Monogram ZBD9900 top-control dishwashers, such as the ZBD9900RII, an AUTO light flashing is a temperature condition: the wash water rose by less than 10 degrees Fahrenheit in 10 minutes. This reading belongs to the technician's…
- Code
- AUTO Light Flashing
- Appliance
- Dishwasher
- Brand
- Monogram
- Warranty
- 30-day workmanship
What AUTO Light Flashing means
On Monogram ZBD9900 top-control dishwashers, such as the ZBD9900RII, an AUTO light flashing is a temperature condition: the wash water rose by less than 10 degrees Fahrenheit in 10 minutes. This reading belongs to the technician's service test and does not appear on the owner's display. The owner just sees a cycle that keeps running, with dishes that may come out less hot or less clean. This reading is confirmed only for the ZBD9900 series and not for other Monogram dishwasher lines.
Common causes of AUTO Light Flashing
- Heating element and its wiring
- Temperature thermistor reading
- Water level during the heat-up
- Circulation pump pressure
- Main control output to the heater
1. Let the cycle finish and check whether the dishes are warm to the touch. 2. Run the next load with the hottest tap water at the sink first. 3. Clean the filter at the bottom of the tub. 4. Note the cycle you used and how the dishes looked. 5. Call us if the dishes keep coming out cool or greasy.
- The owner cannot see this reading, so we read it in the service test
- We measure heater and thermistor values before naming a part
- Low water level and a weak circulation pump can look the same as a bad heater
Other Dishwasher codes
Can I keep using the dishwasher?
Yes, the program continues. The water just may not warm up properly. Expect weaker results on greasy loads until we check the heating circuit on your ZBD9900.
Why is the light flashing but no message?
On this series that reading is stored for the technician and is not an owner message. We bring it up in the service test and see exactly what the control saw during heat-up.
Is it always the heater?
No. A thermistor that reads wrong, low water or a slow circulation pump can leave the temperature rise short. We check each before we quote a part.
Still seeing AUTO Light Flashing?
A technician diagnoses it on site and gives you the price in writing before any work starts.