F14 — Water Intake Fault (Heater Pressure Switch)
F14 is a water intake fault at the heater pressure switch: the switch does not detect sufficient water pressure in the wash circuit during the heating phase. Causes include a low water level, excessive foam/suds, blocked filters, a circulation pump that isn't moving water, or a defective heater pressure switch itself. This is not an NTC temperature sensor fault — NTC faults are separate codes (F01/F02) in Miele's dishwasher fault list.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Hard
- Typical cost
- $40-90
The fix
Heater pressure switch
Water intake fault at the heater pressure switch
Diagnose first: The pressure switch doesn't detect enough water pressure in the wash circuit during heating — check for low water level, foam/suds, or a blocked filter before assuming the switch itself is bad.
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How to fix it
- Check that you're using the correct dishwasher detergent and the right amount — excess or wrong detergent produces foam that can trigger this fault.
- Pull and clean the filter assembly at the bottom of the tub; a blocked filter restricts water reaching the wash circuit.
- Run a cycle and confirm the circulation pump is actually moving water — no circulation means no pressure builds regardless of fill level.
- If filters are clean, foam isn't the cause, and the pump is circulating, the heater pressure switch itself is likely defective and needs replacement — this is a hard DIY job best left to a qualified appliance technician.
Why it happens
Typical signs: F14 shown on the display · Cycle stops or fails to advance during the heating phase · Dishes come out cool or poorly washed because heating never completes
- Low water level in the wash circuit Not enough water reached or stayed in the circuit for the pressure switch to register a proper fill.
- Excessive foam or suds Wrong detergent type or too much detergent creates foam that fools the pressure switch's reading.
- Blocked filters A clogged filter assembly at the bottom of the tub restricts water reaching the wash circuit.
- Circulation pump not moving water If the pump isn't circulating, pressure never builds even with enough water in the tub.
- Defective heater pressure switch The switch itself has failed and won't register pressure that is actually present.
More Miele dishwasher codes
Frequently asked questions
What does the F14 code mean on a Miele dishwasher?
F14 is a water intake fault at the heater pressure switch: the switch does not detect sufficient water pressure in the wash circuit during the heating phase. Causes include a low water level, excessive foam/suds, blocked filters, a circulation pump that isn't moving water, or a defective heater pressure switch itself. This is not an NTC temperature sensor fault — NTC faults are separate codes (F01/F02) in Miele's dishwasher fault list.
What causes the F14 code on a Miele dishwasher?
Low water level in the wash circuit: Not enough water reached or stayed in the circuit for the pressure switch to register a proper fill. Excessive foam or suds: Wrong detergent type or too much detergent creates foam that fools the pressure switch's reading. Blocked filters: A clogged filter assembly at the bottom of the tub restricts water reaching the wash circuit.
Is it safe to keep using a Miele dishwasher with a F14 error?
Yes, with caution. This is rated a moderate-severity fault.
How do I fix F14 on a Miele dishwasher?
Check that you're using the correct dishwasher detergent and the right amount — excess or wrong detergent produces foam that can trigger this fault. Pull and clean the filter assembly at the bottom of the tub; a blocked filter restricts water reaching the wash circuit. Run a cycle and confirm the circulation pump is actually moving water — no circulation means no pressure builds regardless of fill level.
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.