Comment: We have Munchkin water boiler and have had many periods of no hot water due to the system shutting off. The water pressure switch has been shutting down and we get a PrO code ---- this is supposed to happen when the water pressure gets below 10# - I need to find out if it is a problem with the water pressure provided by the city or do I have a problem with my system and if I do I need it repaired.