mypros+
Error code reference

Indesit Washer Error Code F18

Communication error between microprocessor on main module and DSP driving three phase motor (three phase models only).

Indesit codesIndesit washer codes
Avg. service call
$285
National average. Trip fee plus diagnostic plus labor. Before parts.
MyPros+ 3-day pass
$9.95
Same diagnostic steps, on your phone. Start now.
You keep in your pocket
~$275
Even before you buy the part.
Skip the service call. Fix it yourself.
Full procedure unlocks instantly.
Get Started

What the F18 error code actually means

Your Indesit washing machine has detected an internal communication problem between two processors on the main control board that work together to run the motor. The machine has stopped as a safety measure because it cannot properly control the motor. Unplugging the machine for a couple of minutes and restarting it may clear the fault, but if the error comes back, the main control board will need to be replaced.

Diagnostic procedure

The full F18 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Disconnect appliance for 2 minutes, check correct operation by starting Autotest routine; if fault reappears renew main PCB.
Unlock with pass
Unlock with pass
Unlock with pass
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock F18 procedure $9.95

Or subscribe: $29/month for unlimited access to all codes plus Max AI diagnostics.

Most common causes of F18

Ranked by how often they cause this code
  1. 1Transient communication error or firmware glitch
  2. 2Failed main PCB
  3. 3Voltage spike or power surge damage
  4. 4Internal PCB connector or solder joint failure

Most DIYers save hundreds by diagnosing before ordering parts.

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass

Questions people ask about F18

What does F18 mean on a Indesit washer?
F18 on an Indesit washer indicates a communication error between the main microprocessor and the DSP that controls the three-phase motor. This fault only occurs on three-phase motor models. The machine stops operating because the control system cannot reliably send or receive signals needed to run the motor safely. A power reset is the first step, and if the code returns, the main PCB requires replacement.
Will resetting the washer clear the F18 error code?
A power reset will clear F18 if the fault was caused by a transient software or communication glitch. Disconnect the appliance for 2 minutes to ensure a full reset, then use the Autotest routine to verify normal operation. If the error reappears after the reset, the main PCB has a hardware fault and the reset will not provide a lasting fix.
How much does it cost to repair an Indesit washer with an F18 error?
If the fault clears with a power reset, there is no parts cost involved. If the main PCB requires replacement, parts typically range from around 80 to 200 dollars or more depending on the specific model, with labor adding to the total repair cost. Getting a quote from a technician before committing to the repair is advisable, particularly on older machines where the repair cost may approach the value of the appliance.
Can I fix the F18 error myself without replacing parts?
Yes, in some cases the F18 fault is caused by a temporary communication glitch that clears after a full power reset. Disconnect the washer from the power supply for at least 2 minutes, then reconnect and run the Autotest routine. If the code does not reappear, the machine can return to normal use. If the fault comes back, the repair requires a new main PCB, which is best handled by a qualified technician.
Is it safe to use my Indesit washer when F18 is displayed?
No, you should not attempt to run a wash cycle while F18 is active. The error means the machine cannot properly communicate with the motor control processor, and the appliance has disabled itself as a precaution. Running the machine in this state could result in uncontrolled motor behavior or further damage to the control board. Perform the power reset diagnostic first, and if the fault persists, have the machine serviced before use.

Related Indesit washer error codes

All Indesit washer codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass