Tankless water new issue

[berkashire]

Tankless worked fine first few trips. On this one, it dispenses water hotter than what has been dialed up on wall controller. For example, set it to 98 degrees and 103 degrees is coming out shower. Anyone else experienced this and have a fix?

[pconroy]

Originally Posted by berkashire

Tankless worked fine first few trips. On this one, it dispenses water hotter than what has been dialed up on wall controller. For example, set it to 98 degrees and 103 degrees is coming out shower. Anyone else experienced this and have a fix?

I think you're near the bottom limit. It's 95* F I think.

Maybe the unit has a hard time hitting temps that low?
Maybe the incoming water is too warm?
Maybe the flow is too slow?

[DonaandDon]

Ground water temps and onboard tank water temps will effect heater outlet temps. We have found with setting the temp at preferred individual settings a slight various outlet temps are a norm. I just wish I would remember to turn it back up after my shower. The DW loves her hot water for dishes....

[blujay40]

The Girard has a single stage burner and so it's either on or off. Depending on the flow thru the unit as well as the temperature of the incoming water, the Girard can sometimes struggle to maintain the temperature set on the control panel, whether that be too warm as you are seeing and is probably due to the water not flowing thru the unit fast enough or in the instance or really cold ground water, it can't flow slow enough for the burner to have enough time to heat the water to the desired temp.

It was one of the reasons we immediately removed all flow restrictors in all faucets. Short of doing that, one thing you could try to increase flow is that while showering, turn on the hot water in the bathroom sink as well to ensure as much water is flowing thru the burner as possible.