Philips Whirlpool ADP 136/7 – won’t heat or drain

I have just installed in our current house the dishwasher which we had in our previous house. It’s an old-ish machine, but scarcely used, and has been stored for the past few years in our garage. The model is Philips Whirlpool ADP 136/7 serial no 9250103217.

All seemed good. Water inlet (it’s cold-fill) and drain outflow clear, electricity supply fine, some juggling to get it into position under the worktop. But when I turned on the power supply (and as I recall had not switched the machine on as it was empty), I’m pretty sure I heard a “pop” from the machine itself, and a very slight electrical-burning smell.

I checked the fused spur,and the fuse in the plug. Both still OK.

So I set the machine to run – empty – on the short ‘prewash’ cycle, and switched on. It ran OK, seemed to pump water in OK, and clicked through what was about a 10-15 min cycle. Some water drained out part-way through the cycle. But when the program ended, there was still about 3″-4″ of water in the bottom of the machine – and it was cold (I am not certain that the prewash heats the water anyway…).

My suspicion is that the ‘pop’ I think I heard earlier might have been the drain-pump and/or the heating circuit, going bang. Are either of these protected by a fuse inside the machine? Or is it now a matter of checking and replacing either or both of these components (if they are still available)?

I have repaired washing machines and tumble driers but have never tackled a dishwasher. Any advice on fault-diagnosis and on exactly what to check and replace would be welcome.