My water when I run my shower is hot for a couple of minutes and then it goes lukewarm for 5 minutes or so and then goes back to hot. when I put the faucet all the way on hot it doesn't even get "burning" hot. In my second bathroom I can't even get the water hot enough to shower in. I have turned up the temperature on the furnace and it hasn't helped any.
Does anyone have a clue how I can fix this? My blood is turning to ice!