What Does Monogram Dishwasher Error Code C1 Mean?

Error code C1 on a Monogram dishwasher indicates a water inlet fault — the dishwasher did not reach the required water level within the allowed fill time. The control board opened the inlet valve but the water level sensor did not confirm the tub filled properly.

Common Causes

  • Water supply valve closed or restricted – The shutoff valve under the sink may be partially closed.
  • Clogged inlet valve screen – Mineral deposits can block the small mesh filter in the water inlet valve.
  • Failed water inlet valve – The solenoid valve fails to open fully, restricting water flow.
  • Low water pressure – Household water pressure below 20 PSI prevents the tub from filling in time.
  • Faulty water level sensor – The pressure switch or float sensor gives incorrect readings.

How to Troubleshoot

  1. Check the supply valve – Ensure the hot water shutoff under the sink is fully open.
  2. Clean the inlet screen – Turn off the supply valve, disconnect the inlet hose, and rinse the screen filter.
  3. Reset – Press Cancel/Drain, wait 2 minutes, then start a new cycle.

When to Call a Professional

A failed inlet valve or water level sensor requires replacement. Call 844-752-7887 for expert Monogram dishwasher service.

Need Help? If the error code hasn't resolved after basic troubleshooting, call our certified Monogram technicians at 844-752-7887 for professional diagnosis and same-day repair.