What F-1 means on your Dacor dishwasher (dacor dishwasher f-1)
Dacor dishwasher f-1 is a Legacy Dacor (pre-2016) code from the EDW/IDW platform’s WPS (water-presence-sensor) architecture: after commanding the inlet valve to fill, the control board looks for conductivity in the sump confirming water actually arrived, and f-1 fires when that conductivity is never detected. Because the whole EDW/IDW problem system is built around this one sensing principle, a fill-related problem reads as a water-valve or related system problem rather than pointing at one exact part, which is exactly how Dacor’s own service manual frames it. The dishwasher will not proceed into a wash cycle without confirmed water present, since running heating or a wash arm dry can damage the pump and heater.
Symptoms
The signs below separate this condition on your Dacor dishwasher from other problems that present almost identically on a dishwasher.
- F-1 appears on the display shortly after a cycle is started, before any wash sounds begin.
- The dishwasher may sit silently for an extended period at the start of a cycle before the problem shows.
- No water is heard entering the tub at all when the cycle should be filling.
- The household water supply valve behind the dishwasher may be found partially or fully closed.
- The problem can follow a period when the home’s water was shut off for other plumbing work.
Common causes
What produces F-1 on a Dacor dishwasher is not always the component people assume, which is why the dishwasher causes below run from most to least likely.
- Closed or restricted water supply valve — the shutoff valve feeding the dishwasher is not fully open.
- Failed inlet valve — the valve is not opening electrically even though it receives the fill command.
- Kinked or clogged fill line — a bent or blocked supply line prevents water from reaching the tub.
- Faulty WPS sensor — the sensor itself is not detecting water that has genuinely arrived in the sump.
- Wiring failure between the WPS sensor and the control board — a loose connection can prevent a true fill from ever being confirmed.
Troubleshooting steps you can try
Run these checks on your Dacor dishwasher in the order given, stopping at the first that asks you to open the dishwasher up or touch anything electrical.
- Check the water supply valve under the sink or behind the dishwasher and confirm it is fully open.
- Listen closely at the start of a cycle for any sound of water beginning to enter the tub.
- Inspect the fill line for any visible kink where it runs behind or under the dishwasher, if accessible.
- Power-cycle the dishwasher at the breaker and start a fresh cycle to see whether f-1 recurs.
- Avoid running additional cycles repeatedly while f-1 is present, since it will not clear without water actually being confirmed.
Parts a technician may replace
The parts most often in question on a dishwasher here are the water inlet valve, wps water-presence sensor, sump wiring harness, and control board. Which one has actually failed on your Dacor dishwasher is settled by measurement, and nothing is ordered for the dishwasher before that.
When to call a technician
If the supply valve is open and water can be heard or seen entering the tub yet f-1 still appears, the WPS sensor or inlet valve needs testing by a technician. There is no urgency at Medium severity, yet a dishwasher that repeats F-1 after these checks deserves a technician’s eyes. The technicians who will see your dishwasher are ours, not Dacor’s, and their labor is covered for 30 days.
Related help and Dacor resources
If the F-1 condition keeps coming back on your dishwasher after these checks, book Dacor dishwasher repair, read the rest of our dishwasher problem pages, or schedule a visit. Manufacturer specifications for your dishwasher are at www.dacor.com.
