The hot and cold water from your home connect to the water inlet valve on the back of the washer. In each end of the water supply hoses there may be a filter screen to catch debris and prevent it from damaging the washer. The water inlet valve also has filter screens. If the filter screens become clogged, the result is low water pressure, no water or the wrong water temperature.
Before checking the filter screens, unplug the washer or shut off the power at the fuse box or breaker panel to avoid an electrical shock hazard.
The water inlet valve can be identified by the water hoses connecting to it at the back of the washer. Start by turning off the water supply at the valves on the wall. Disconnect both hoses from the back of the washer. Place the hoses into a bucket and turn them on to confirm that you are getting adequate water pressure and to clear any debris from the line.
Inspect the filter screens on both of the hoses and the inlet valve for debris build up. If you find any debris, clean it out. The screens in the inlet valve are not removable so use caution to avoid damaging them.
If you are getting good water pressure and you find no build up of debris, then the inlet valve itself may be faulty. Refer to the article about checking the inlet valve for further information.