Unsatisfactory Behavior of Tankless Water Heater

There have been lots of complaints about tankless water heaters for rvs and if you do a search on this forum, Jayco forum, Forest River forum and Winnebago forum you will see lots of issues. The main problem is that unless there is a constant, steady high flow of water into the heater, it runs hot and cold. This mainly happens when using the water pump but if a campground has low pressure or low flow of water, then it can be a problem.