Error code · Dishwasher

ASKO Professional Dishwasher Code F40: Leak Through the Inlet Valve

High · stop use, call now

Code: F40
Appliance: Dishwasher
Brand: ASKO
Warranty: 30-day workmanship

What F40 means

F40 on an ASKO Professional DWC6432 dishwasher, such as the DWC6432BIXXLSU or DWC6432FIXXLU, is the inlet valve leakage message. The DWC6432 is the professional line, built for commercial and multifamily use. The control found water entering the tub when the inlet valve should have been closed, which suggests the valve is not sealing. Because water could keep coming in, the machine stops and shows F40.

Common causes of F40

An inlet valve that does not seal when closed
Debris or scale holding the valve seat open
High water pressure forcing water past the valve
The control not closing the valve circuit

✓ One safe check you can try

1. Turn off the water supply valve to the dishwasher right away. 2. Dismiss the message with any button. 3. Look for water on the floor or in the base of the machine. 4. Leave the water off and stop using the dishwasher until it has been checked.

! Why to stop there

Whether the inlet valve is the leaking part or the control is holding it open
Whether water has already reached the machine base or the cabinet floor
Whether house pressure is part of the cause

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

F67ASKO Dishwasher Code F67: Water Inlet Warning, Second Type F68ASKO Dishwasher Code F68: Brushless Drain Pump Not Responding to the Control Flashing LightsASKO D3251 Dishwasher Flashing Lights: Five Programs That Signal a Problem F12ASKO Professional Dishwasher Code F12: Tub Slow or Failing to Fill F54ASKO Dishwasher Code F54: Overfilling Water 2 F41ASKO Professional Dishwasher Code F41: Heating Circuit Problem F56ASKO Dishwasher Code F56: Circulation Pump Not Running F52ASKO Professional Dishwasher Code F52: Sensor Reads the Water Level Wrong

F40F40 questions

What does F40 mean?

The dishwasher saw water coming in when it should not have been. That points to the inlet valve not sealing, and we confirm it by testing before replacing anything.

Why should I shut off the water?

A valve that leaks through can keep filling the tub or the base of the machine. Closing the supply valve is the simplest way to prevent a flood while you wait for service.

Will the repair be priced before work starts?

Yes. Call us or use the online form, and we will confirm a three-hour arrival window. You receive a written price first and a 30-day workmanship warranty afterward.

Book a visit

Still seeing F40?

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

(713) 804-6320