hi there Amy if your not electrically minded and dont want to zap ya self, then for a temporary basis for cold wash only, try this:
swap over your water pipes hot - cold / cold -hot this way u will only have cold water entering in your machine replacing the hot water previously. but definately get it fixed, do what user "11" said to do and it does sound like the cold water valve is faulty or no power is supplying this part.
also just a silly thing to check before all of this, make sure your cold water tap is working and water is comming out the end of the cold water pipe use a bucket or wash basin for drainage, good luck:)
brad, April 2005