What is a Cold Water Sandwich? Having a problem with your tankless water heater turning cold after a few minutes? Find out what might be causing the problem here with Alan O’Neil from Abacus Plumbing. Your browser does not support the audio element. https://media.blubrry.com/homeshow/homeshowradio.com/wp-content/uploads/2014/06/EE-ABA-050414.mp3Podcast: Play in new window