Cold water runs into machine slowly. Hot/warm water runs in fine. Can turn off cold water valve for a few seconds, then turn back on and cold water pressure is fine; however, this doesn't always work. Took off hose and couldn't find any debris or blockage.
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Try checking for debris clogging the inlet of the washer. Shut off the supply water, then start the machine to do a warm wash (to relieve any water pressure in the hoses) for a few seconds - then shut off. Unplug from power and move the machine so that you can have good access to it and then mark and disconnect the hoses. Some machines have screen filters on the hose inlets. Check and clear out any obstructions you may find. It's not unusual to find sand, metal / rust chips, etc as can result from being pumped up from a well or an opened fire hydrant on the street due to a fire or the town simply flushing lines.
Before reconnecting the hoses - place and hold the ends into the tub (if possible) and turn the water on slowly to make sure that water comes out of both. This ensures that there is water flow all the way up to the machine inlets. You'll have to clear or replace any parts (hoses, screen, etc.) as needed to get water flowing.
If still not working - the issue can be a simple hot / cold water solenoid valve replacement ($) to something more involved ($$$). Check out the video to get an idea as to how to check out the valve (it's very similar to all machines).
The chances are that this is one of the rubbers in the inley valve vibrating at a high frequency as water rushes past it. Usually the result of high water pressure, though occasionally low pressure (But I would expect you to describe that as a low humm, so lets presume the pressure is a bit high).
Your machine may be cold fill only or hot AND cold fill. The chances are highest that the COLD feed is the issue (Hot water is usually at a lower pressure) so start there. Try reducing the pressure to the feed, if you have no specific way of doing this, then simply go to the isolator valve where the feed pipe to the machine meets the plumbing and slowly turn it off. as you turn the lever on the valve, the noise will probably reduce long before you have actually isolated the water supply completely. Leave the isolator valve lever in that position.
I believe the issue is with the water inlet valve assembly
going bad and should be replaced, this unit has two valve one for cold and
another for hot. You can test the valve first if that is fine then check the
pressure switch which is part#4 in this diagram. Hope this helps...please post
back for further assistance.
usually the wash is a mix of hot and cold and the rinse is just cold, that said, it is most likely a problem with the cold water supply. check to make sure the cold water valve is all the way open and the hose isn't kinked. If those are ok turn the water supply off and remove the supply lines on the machine side, you will see a screen inside the washer that may be clogged with sediment. If so, just clean it out and put it back together. You may also want to run a wash cycle on cold only to see if it fills slowly for the wash cycle. If it does fill slowly on cold you have low pressure on the cold side.
You MAY have a faulty cold valve (Not unusual) Or low water pressure. If the machine will fill ok on 'hot' but has a problem on 'cold' then you probably have a faulty 'cold' valve.
Do not change wires to 'hot' valve, as there is a difference..
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.
while the unit is filling in the warm cycle. reach behind and shut off the hot water tap.I bet the water flow stops filling, if so, you would need to change the inlet valve on the machine. You see, in warm, if the cold is not filling, you still hear the hot filling and the unit will advance. The rinse cycles are mostly "cold" only. if the valve is not opening it will not allow it to advance from the rinse section on the board.