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Did anyone shut off a valve that would isolate the faucet? If not then the washer in the faucet could have broken loose or the stem could have stripped. Either could cause the issue you describe. If you want specifics I'd need a picture of the faucetYou can post a picture here by clicking on the paper clip icon in the tool bar at the top of this dialogue box. You can only post from a PC or a Mac not a phone or a tablet. If that doesn’t work for you then you can upload a pic to a file sharing service like Google pics or Dropbox. Then post the “share” link to your picture here or you can email the pic to customer service but the last option can take quite a while to get to me. Click on the CONTACT US link to contact customer service. http://ww2.justanswer.com/contact-us