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Error code · Dishwasher

Monogram ZBD9900 Dishwasher Code LIGHT Light Flashing: the tub is not filling

On Monogram ZBD9900 top-control dishwashers, including the ZBD9900RII, the LIGHT indicator flashing is a water intake message. The control counts pulses from the flow meter, and it saw fewer than 80 within 60 seconds, or did…

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Code
LIGHT Light Flashing
Appliance
Dishwasher
Brand
Monogram
Warranty
30-day workmanship

What LIGHT Light Flashing means

On Monogram ZBD9900 top-control dishwashers, including the ZBD9900RII, the LIGHT indicator flashing is a water intake message. The control counts pulses from the flow meter, and it saw fewer than 80 within 60 seconds, or did not reach the expected count within 255 seconds. The program stops. The owner sees the LIGHT indicator flashing and a dishwasher with little or no water in the tub. That reading applies to the ZBD9900 series and nothing else.

Common causes of LIGHT Light Flashing

  • Water supply valve and line to the dishwasher
  • Inlet valve opening and its coil
  • Flow meter turning freely
  • Wiring between valve, meter and control
✓ One safe check you can try

1. Make sure the water supply valve under the sink is fully open. 2. Run the kitchen faucet to confirm that water pressure is normal. 3. Check the supply line for kinks where it is visible under the sink. 4. Close the door firmly and restart the cycle. 5. Call us if the light returns after the supply is confirmed open.

! Why to stop there
  • A closed valve is the easy check, but the inlet valve itself can restrict flow
  • We test the flow meter and the inlet valve coil
  • We check the wiring before any part is replaced
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 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 NORMAL Light FlashingMonogram ZBD9900 Dishwasher Code NORMAL Light Flashing: thermistor reading out of range 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 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
LIGHT Light FlashingLIGHT Light Flashing questions
Why does it say water when the tub is empty?

The control counts water going in. If the count is too low, it stops and flashes the light because it cannot confirm the tub is filling at the right rate.

Could low water pressure cause this?

Yes, a half-closed valve or a clogged inlet screen can slow the fill enough to fall under the count. A normal faucet flow helps us rule that out quickly.

Is it safe to leave the dishwasher plugged in?

Yes, with an empty tub there is no water risk. If you see water on the floor, close the supply valve and call us. Leave the door closed until we arrive so nothing is disturbed.

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Still seeing LIGHT Light Flashing?

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

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