Indesit W161 Flashing 4 Times

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Indesit W161 flashing 4 times indicates F04 pressure switch circuit fault

The problem

An Indesit W161 initially had the programme selector rotating continuously, first traced to coins blocking the pump. After a second pump blockage, the same fault remained even after the obstruction was cleared and a new pump was fitted. The machine was then reported as flashing 4 times.

Likely cause

The accepted reply identifies 4 flashes as fault F04: pressure switch jammed on empty, with the pressure switch or control module implicated. The original poster had already tested the pressure switch and believed it was working, so the exact failed part was not confirmed.

What fixed it

Check the pressure switch circuit and the module in line with F04. As the pump had already been replaced and the pressure switch had reportedly been tested, further diagnosis should be carried out by a suitably qualified appliance engineer.

Checks to try

• Pump checked and coins removed on two occasions
• Pump replaced
• Pressure switch removed and tested with a circuit tester
• Fault identified from 4 flashes as F04 by the accepted solution

Parts or tools mentioned

• Pump
• Pressure switch
• Circuit tester