Re: indesit idl535 beeps and switches off
Its an IDL53S BTW, 😉
Lights 2+4 are very common on these machines. It a heater fault, it can be the heater or the control module.
As your machine appears to have the heating element that is visible inside the tub rather than the tube type heater which is underneath the machine it may well be the module.
The type of heater you have is not as prone to failure as the tube one.
The only way to proceed is to unplug the machine and test the heating element for resistance, continuity and earth leaks first.
Jim.