Every time i press the start button and the water starts it trips my main switch i have replaced the mains suppressor and the fill valve but it still does it can you help. john matthews

Please check on the water flow to the drum, if the flow is low or if the inlet is choked the water flow in the set time limit can be low and so could trip.
secondly it can be due to problems in the level sensor, try and see if the pressure switch works outside.
Finally check on the program controller unit once again to see the triping. check the door switch for loose connection.
check this link for tips:Washing machine

Water-inlet valve The water-inlet valve lets water enter the machine. If this valve is defective, you need to completely replace it. It's usually located behind the lower access panel on the left or right side. It's the device with the main water line (usually copper) from the house, a rubber tube to the dishwasher, and two wires attached to it.

Float switch The float switch is a small electrical switch that's located right below the dishwasher "floor." Above the switch, on the inside of the dishwasher, is a plastic cylinder that floats up as water fills the dishwasher. If this switch is defective, or if the plastic float gets caught or trapped in the raised position, the water can't enter the dishwasher. If the float switch is defective, you need to replace it.

Sounds like you need to have the mains suppressor checked out by an engineer.
Someone had this happen to them as well.
I checked fuses - ok I drained detergent water -ok I checked filter and pump - ok Machine will not start. Next step - contact customer service, however under the Sales of Goods Act 1979 I am contacting the supplier as the machine is new.
I hope you get your machine running soon.
Update The fault was as follows: Bosh Washing Machine WAE2446 Fault reported: DEAD Material: SUPPRESSOR Description: REPLACED FAULTY MAINS SUPPRESSOR
In a nut shell. The washing machine failed (went dead) because the mains suppressor was faulty. The suppressor normally filters out unwanted interference from the washing machine mains electrical supply. The part was replaced and the washing machine came back to life.

You have not mentioned the make or model of the washer. But the fault relates to the failure of the inlet valve-- check if this gets heated up , if so the valve is short and is tripping the main controller.
Secondly the tripping is due to failure of the program controller unit, the main motor or the water level sensor. Finally make sure that the door switch is working.

Hello,
It would seem to me that the heating element needs replacing from the information you have supplied especially as it performs most of the other functions like filling and spin and drain.
Good luck

The inlet valve is stuck open most commonly , you can check this by taking the wires off the valve and then turn everything back on , if the water is still flowing replace the inlet valve.
Phil

I'm no expert, but I recently had a fill valve replaced. There is a float switch at the bottom of most dishwashers. Its purpose is to cut power to the normally-closed electrically-opened fill valve in the event of an overfill. If the float switch "thinks" there is an over-fill situation, it will cut power to valve, closing it. I would start with replacing the float switch or checking to ensure that it is not stuck in the "up" position due to debris.

Again, I'm no expert.

Sound like the fill valve is not working. I woudl check the hoze for a clogged screen ,then replace the fill valve if no clogs found. 

possibly the inlet water valve stuck open tho this is rare.

disconnect the valve electrically and see if the fault is still present. if so, the valve is stuck open and needs replacing

Found These Fault Codes On Internet, Hope This Helps, Daz

ALARM CODES

E00(E00)- Problems with water fill during washing
-Tap closed; solenoid valve, water distributor, wiring ,main PCB, pressure switches

E01(E00)- Problems with water fill during drying
-Tap closed; solenoid valve, wiring , main PCB, pressure switches

E10(E10)- Problems with water drain during washing
-Drain hose kinked, filter blocked, drain pump, water distributor, wiring , main PCB, pressure switches

E11(E10)- Problems with water drain during drying
-Drain hose kinked, filter blocked, drain pump, pressure switches

E20(E20)- Door open
-Cycle in Door delay, wiring , main PCB

E21(E20)- Fault in door delay power triac
-Wiring , main PCB

E30- Fault in electronic pressure switch
-Electronic pressure switch, wiring , main PCB

E31- Fault in electronic pressure switch circuit
-Main PCB (fault in electronic pressure switch circuit)

E32(E10)-Calibration error in electronic pressure switch
-Electronic pressure switch, drain pump, wiring , main PCB, filter blocked

E33- Incongruency between electronic pressure switches and safety switch 1
-Electronic pressure switch, safety pressure switch,wiring, main PCB

E34- Incongruency between electronic pressureswitches and safety switch 2
-Electronic pressure switch, safety pressure switch,wiring, main PCB

E35- Intervention of anti-overflow pressure switch
-Solenoid valve, water distributor, wiring, main PCB,anti-overflow pressure switch

E36- Water leakage (maximum number of resets exceeded)
-Water leakage, drain hose too low, pressure switch,wiring, main PCB

E40- Motor power triac short-circuited
-Main PCB (triac short-circuited)

E41- No signal from tachimetric generator
-Tachimetric generator on motor, wiring, main PCB

E42- Fault in tachimetric generator circuit
-Main PCB (tachimetric generator sensing circuit)

E43- Intervention of motor overload protection
-Motor, wiring, main PCB

E50- Insufficient heating during wash phase
-NTC sensor setting incorrect, heating element, wiring,main PCB

E51- Overheating during wash phase
-Heating element (to earth), main PCB (relays)

E52- Insufficient heating during drying phase
-NTC sensor setting incorrect, safety thermostat,thermostats, drying heater, wiring, main PCB (relays)

E53- Overheating during drying phase
-Drying heater (to earth), main PCB (relays)

E55- Fault in power relay for heating element (K3)
-Safety pressure switch 2, wiring, main PCB- 6 -

E60- Fault in washing NTC sensor
-Washing NTC sensor, wiring, main PCB

E61- Fault in drying NTC sensor(condenser)
-Drying NTC sensor (condenser), wiring, main PCB

E62- Fault in drying NTC sensor(duct)
-Drying NTC sensor (duct), wiring, main PCB

E63- Fault in 1/2 power thermostat
-Drying NTC sensor (duct), 1/2 power thermostat, wiring,main PCB

E70- Power triac to distributor motor short-circuited
-Main PCB (triac short-circuited)

E71- Fault in power relay to distributor loads
-Main PCB (relay open)

E72- No distributor position signal
-Water distributor motor, wiring, main PCB

E73- Incorrect timing on distributor contacts
-Water distributor, wiring, main PCB

E90- Fault in tank fill pump
-Hoses obstructed, tank fill pump, wiring

E91- Fault in tank drain pump
-Hoses obstructed, tank drain pump, wiring

E92- Fault in power triac to tank fill pump
-Tank fill pump, wiring, main PCB