Written by
Lena Hartwell Appliance Care EditorPublished October 27, 2026
VERIFIED
Error code4C
ApplianceDishwasher
Start with the supply
4C appears on Modernist and Heritage 24-inch dishwashers, DDW24M99* and DDW24T99*, and it is a water supply check. The manual lists three things to verify, in this order.
See whether the water supply valve has been closed.
Find out if the water supply has been suspended.
Consider whether the inlet valve or its line is frozen or clogged with foreign particles.
If 4C does not go away
Once the three checks are done and the code still appears, book a technician.
Neighbouring dishwasher codes
5C is the drain check, so it deals with water leaving instead of arriving.
Owners around the Bay Area can ring (415) 687-5926 regarding Dacor dishwasher repair in San Francisco. Have 4C, the model number and the supply checks you finished ready to tell us.
Model compatibility: Dacor reuses codes across series and model years, so 4C may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
4C is a water supply check on the dishwasher.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Dacor appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your Dacor appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
