Tankless hot water heater-not working now
... but it was last week. It gives us lukewarm water, but not hot. The hardest part of having it has been getting enough cold mixed in to cool it down to useable bathing temperatures. We demolitioned the unused bathroom last Saturday, he capped the pipes, and we no longer have hot water. How come it's not cold, not hot, but is lukewarm?! What happened?