Indesit IDL 500 faulty but no flashing lights

Hi everyone, I’ve viewed this forum before as a guest so this is my 1st post.

This is quite an old dishwasher so before I decide to spend the cash on a replacement it would be good to know if this one can still be easily fixed.

About a year ago I got the famous 1st and 3rd lights flashing and after reading this forum I gave the high pressure switch a good clean and it’s worked ever since. Now the problem is a bit differente, on program 4 the machine fills with water to just below the heating element and then all I hear is a humming noise nothing else. I turn the machine off, open the door and a there’s a lot of steam inside which is caused by the heat from the heating element. On programs 1-3 the machine fills with water again to just below the heating element then the humming noise for 30sec to a minute, then empties the water, fills up again, humming noise and carries on like this until I turn it off.

Any help would be appreciated.