Re: hotpoint washer/dryer model no. BWD129
This machine has few, ii any redeeming features, it is 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} Indesit.
Lights 3+4 are F03 or NTC failure. If you are lucky this machine will have the earlier NTC ( Temp Sensor ) that is a round device located in the back of the drum, it has two wires attached to it and is secured inside a rubber grommet.
That type is prone to failure and is cheap to replace. If that part is not faulty then it could be bad wiring connections between the NTC and the main PCB or a failure of the main PCB itself.
Part number is C00053575.
Part available HERE