F24 is a heater relay problem on another model. in their own words
18 seconds after starting the drain sequence, the electronic will perform an operational test on the heater relay. The circulation pump is not operating and no power is applied to the heater relay coil. If 230VAC is registered at ST5 on the electronic board, then an F24 is logged in memory (see Figure 080-9). When the circulation pump is not operating, the heater relay contacts are checked. If supply voltage is then applied to the electronic’s inputs, the fault is registered.
may be different on your model but it looks like it senses a voltage but this may be affected by the water so let it dry out and take from there
Dave