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Just found some codes online; could someone confirm if these are correct for the 6033?
F1
Water heating error detected
For this error code you need to check both the water heater or element and thermistor, the washing machine is reporting a fault on the heating circuit with this fault code but it is not capable of identifying exactly where the fault actually lies.
<ul>
<li>Check water heating element </li>
<li>Check heater for contunuity </li>
<li>Check thermistor or temperature sensor </li>
<li>Check the thermistor resistance </li>
<li>Check wiring to water heating element </li>
<li>Check connections to water heating element and temperature sensor </li>
</ul>
F2
Water fill time out
The washing machine has failed to fill with water in a reasonable time.
<ul>
<li>Check water supply is on, clear and not frozen </li>
<li>Check the air chamber and pressure sensor hose for blockages </li>
<li>Check water inlet valve </li>
<li>Check wiring to water inlet valve </li>
<li>Check connections to water inlet valve </li>
<li>Check the main control PCB </li>
</ul>
F3
Not drained in time allowed
Washing machine fails to drain water
<ul>
<li>Check that filter is not blocked or obstructed </li>
<li>Check drain hose is clear of any blockage or obstruction </li>
<li>Check wiring to drain pump </li>
<li>Check drain pump is not defective </li>
<li>Check level sensor or switch </li>
<li>Check wiring to level sensor </li>
</ul>
F4
Washing machine has detected an overfill situation
This error code can be caused by overfoaming which is a result of overloading (see this article) or by overdosing or, incorrect detergent as the pressure sensor will falsely read that there is too much water in the washing machine, although this was very rare in these old Servis washing machines.
<ul>
<li>Check the pressure sensor and that the machine has not actually overfilled with water. </li>
<li>Check for overfoaming or over soaping </li>
<li>Check the air chamber and the pressure switch hose </li>
<li>Check water level sensor </li>
<li>Check wiring to water pressure sensor </li>
<li>Check connections to water level sensor </li>
<li>Check main electronic controller </li>
</ul>
F5
Water heater fault
This fault code tells you that the washing machine has detected an error with the wash heating element.
<ul>
<li>Check water heating element</li>
</ul>
so here it is (again). 
