WAYNE G DENGEL
New Member
Hello, first time caller..
Have a tankless heater that I installed 2 years ago. It uses 3 20-Amp, 220 circuits. Been working great, then 6 months ago, started turning cold. In bathroom, with HOT water on only at sink, it will turn cold quickly, and never turn hot again. I can wait 5 minutes with it flowing, and just cold. If I turn on a 2nd sink hot water, it will finally turn hot. This lead me to believe that the flow sensor was bad. The manufacturer sent me a new flow sensor, but the problem still persists. I ran some tests, including FLOW and have no problems. Nothing has changed in my plumbing, and this is not a hot-water sandwich, or cold-flow cross over. Like I mentioned it can happen on the HOT water only (2 valves).
Seems to be getting worse, today the shower now goes cold. My wife is annoyed and I am lost.
I think there is a thermal cut-off that is kicking in, but not sure how to test, or how to get manufacturer to replace unit.
Thanks for listening.. Help!
Have a tankless heater that I installed 2 years ago. It uses 3 20-Amp, 220 circuits. Been working great, then 6 months ago, started turning cold. In bathroom, with HOT water on only at sink, it will turn cold quickly, and never turn hot again. I can wait 5 minutes with it flowing, and just cold. If I turn on a 2nd sink hot water, it will finally turn hot. This lead me to believe that the flow sensor was bad. The manufacturer sent me a new flow sensor, but the problem still persists. I ran some tests, including FLOW and have no problems. Nothing has changed in my plumbing, and this is not a hot-water sandwich, or cold-flow cross over. Like I mentioned it can happen on the HOT water only (2 valves).
Seems to be getting worse, today the shower now goes cold. My wife is annoyed and I am lost.
I think there is a thermal cut-off that is kicking in, but not sure how to test, or how to get manufacturer to replace unit.
Thanks for listening.. Help!