I have a Hotpoint Aquarius Extra 1200 Spin WD64. It still works as it should except for an almighty noise on the final fast spin.

Have you checked the filter if fitted? Sometimes washing machines will not spin if they're not empty.

Was it working before? You may have a blocked outlet hose. Try taking it off under the sink to look for a blockage. You could also try getting some water in from that end with another hose to see if it comes out into the machine. If it is not a blocked hose, then the pump may be faulty.

The cost to replace the COUPLER would be prohibitive. You're probably looking at $300 because of the labor involved.

Probably open circuit heater element, or thermostat/s
Remove top cover, and you will see the heater manifold on the top of the drum.
It is a long aluminium box.
The element and stats are located here..
You will need a meter to test the appropiate components for continuity.
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common problems with timer which work like a clock and goes though the cycle, bad timer will cause it not to go through its cycle. it very cheap and easy to replace everything is all plug in.

I moved my washining machine in order to check pipes....thought id do a final test spin hoping that it would work changed the temperature setting to higher degress (60) put in on a empty wash for about 5 mins then turned it to fast spin an it slowly started spinning until it finished a complete spin!!!!...dont forget to turn the temperature down again!!!

yes the ball should be in there,but shouldnt cause you any major problems if removed.

check the pump, make sure drain hose is not cloghed, ensure the belt is in the place, spin the drum a bit by pulling the belt. then give it a go.
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Open the washer door and spin the drum by hand, if it feels rough or noisy and rumbling, then the main drum bearings have failed. There should be little or no noise when you spin drum
This is a major repair, and I would not recommend a D.I.Y solution.
Other possibility is there is something in the pump, but you would only hear this when the pump is working.

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I had this problem. It is not to do with the switch.
The point at which it trips, will be when the spin starts to get fast.

There is a design flaw - and this is particularly easy to see in the dark, as you can see the spark!

The bundle of wires that links to the end of the motor rubs against the motor mount, and one or more wires break through the rubber insulation shorting whenever the drum and motor start bouncing around. Find the break, and use a stack of insulation tape to re-insulate - better still, get a professional to replace the wire.

That worked instantly for me, and have no other problems since.

Tim