Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Tankless water heater temp fluctuations
Hello everyone. I have an oil boiler for home heating and water heating with recirc loop. When we turn on the hot water it will warm up then in a few min get cold and after around 5min get warm again but after another few minutes water gets cool again and takes longer to warm up. Or it seems that it takes longer cause you all soaped up cold in the shower. The water settings are L150 H190 diff 20. Those are the setting it had since we move in a few months ago. I would say the temp fluctuAtion has been there since we move it.
On researching the forum the initial cool down of water could be “sandwich” Effect but then it should stay warm after it warms up again. Correct ?
I’m wondering if this is normal for this type of water heating or any ideas ? I’m trying to get an understanding of what could be wrong before I call someone for service.
Could it be my settings? Mixing valve?
Side note home heating works normal.