Do you know if it's a hot or cold feed at inlet

I am assuming you can select water temperature on your machine. Simply hook up your pipe to the cold water feed on the machine, and leave the hot water feed alone. Always select cold water on the machine before beginning a load. If it makes you feel better, cap off the hot water inlet on the washing machine.

Might be a bad inlet valve. To confirm, swap the hot and cold hoses to your washer so that the cold water feeds the hot water connection and the hot water feeds the cold water connection. Turn off both hot and cold water faucets. Set the washer for a warm water wash. Turn on the cold water faucet, and check the flow. Then turn off the cold water faucet, and turn on the hot water faucet and check the flow. If the cold water flow fill slowly, then the problem is with the inlet valve.

It an easy part to obtain from an appliance supply house. To install disconnect the hoses to the back of the machine, and remove the back panel to get access to the valve. Should only take a couple of minutes to remove and install. Hope this helps you.

If it is a hot and cold fill washer with 2 seperate inlet hoses, and no hot is entering, then either the hot inlet valve is faulty, or the valve is not getting an electric feed to it.
Make sure that the programme you select is ahot prog, as many of the programmes are3 cold fill only.

All Hotpoint washers have heater element regardless of whether they are cold fill only, or hot and cold fill.
if 2 connections at rear, then it is hot and cold fill, if only 1 connection, then it is cold fill only.
Please rate my solution.
Thanks.

There is too much pressure on the cold feed, reduce the pressure on the cold by partly closing off the tap on the cold.
Or ensure the hot feed is fully open and not blocked, check if there are filters inline - remove the feed pipes at the washer end and look into the inlet valves - clear if blocked.
The inlet valve is common to hot and cold water with only a small pipe to fill the machine, the cold water is being forced back up the hot water pipe due to the pressure you can feel the pipe cool down after running hot then go to warm, if hot water is flowing the pipe will stay hot, if not then cold is going up the hot pipe.

Inside the machine you have a valve called inlet.

The inlet water valve will collect the cold and hot water lines, and open alternatively one or the other during cycle.

To access the inlet valve you need to take apart the machine, and that is not an easy task.
If you DIY remember to unplug power, there is high voltage running inside your appliance.

Below the inlet valve for your model:

1014350

There are 2 versions of the Hotpoint WD640, a cold fill only version, and a hot and cold fill version..
From your question, I conclude you have the hot and cold fill version, which requires a hot and cold fill supply..
I do not understand what you mean by leaking from top banch, perhaps you can clarify.

Please rate my solution.
Thankyou.

First off, are you sure you don't have the water lines feeding into the washer crossed ( as in cold line is going to the hot inlet and visa versa) .. secondly, are you sure your hot water is really hot? Hope that helps....

Yes. There is a part that allows you to connect the cold water supply to both the hot and cold inlet hoses. It has worked successfully on our 6100 for 8 years or so. I think it was part of the original kit rather than a subsequent purchase - it's a Y-shaped yoke with an inlet connection and two outlets that accept the two hoses feeding the inlets of the machine. From memory i tink the situation is mentioned in the user manual somewhere.

First plug off the wall. Before connecting the "hoses" (both hot and cold) to the machine inlets see that the inlet is clean. Connect the outlet hose to the standpipe, not too deep. The outlet hose has to be about 3 feet above ground level; there is a water level mark behind the machine. Both the inlets should be well screwed in, noting the threads of the inlets

You said the water was gushing.....into the machine? Fine .....what next.......post back.