MrWizard wrote:
Sounds like a blockage somewhere
For a test drain the water heater
Open a hot water tap and turn on water pump
If it does the same thing blockage is on the input side to heater
Possibly a strainer ?
If the it happens after the tankless fills up
Blockage is on the output side of heater going to RV water system
I know that doesn't sound right
It just might be that you need to replace the water pump
Could be flow has decreased thru/from the pump
Remember this is a tankless water heater. Nothing to drain. I have been suspecting a failing pump.
