Indesit dishwasher IDL40

Machine goes through all the cycle (usually no3) but instead of the fourth light flashing at the end of the programme the wash light is flashing in unison once the programme has finished.

No kinks in hoses, no blockages in the drain sump, salt and rinse aid in situ.

Dishes are perfectly clean but scared to leave it unattended in case it blows up.

Machine worked perfectly the first wash after it was taken apart and put back together again and the cleaner liquid was used through it, then back to the two flashing lights again.

Any suggestions?

led 1= Prewash / 3hr
Led 2= Wash / 6hr
Led 3= Rinses / 9 hr
Led 4= Drying / 12hr

LED. illuminated
1 = Overflow ( water in base )

1+2 = Pump timeout, or Software recognition error ( timer not programmed, wrong keypad)

1+3 = Circulation pump not working

2+3 = Not filling

2+4 = Heating circuit not working

2 = Solenoid valve 'broken' or heater open curcuit try a descaler first

3 = Thermistor (NTC) cicuit not working

4 = Temp not reached whilst heating ( poss NTC detached from casing).

It is usually necessary to 'reset' the machine after a fault code has been displayed.

Resetting.
Switch dishwasher OFF, rotate the selector switch to STOP/CHANGE and switch on, after a few seconds the LEDS will go out enabling a new programme to be selected.

2 and 4 it is that lights at the end of the programme. If anything, the heating circuit is working too well on programme3..rapid and dry they are roasting hot and bone dry.

Switched it off today and used programme4 to rinse it out, just cold water and no heat involved, so only 4th light on a end of programme. Will use the usual prog3 after dinner and hope it is back to normal. If not, is it an engineer call out job to fix it?

Thanks

Poss thomostat come out of the dispenser ,undo door panel it should be a little White square of plastic that goes onto the back of dispenser.

hi I have one of these and the lights 1 and 2 are flashing can this be sorted by me or need a technician