If you believe that this might be the source of your problem carefully inspect all of your shower heads faucet aerators and plumbing fixtures.
Tankless water heater water temperature.
With tankless water heaters temperature fluctuations are commonly caused by restrictions on the flow of hot water.
Well the tankless water heater has a flow switch in that water heater and if you ve got it all the way it s got a flow switch in the water heater and you ve gotta have so much flow going through that water heater for that water heater to kick on.
Florida and minnesota will not have the same groundwater temperature.
If we set temperature of water heater at 120 f it will burn less gas or fuel or consume less electricity.
Maintaining constant shower temperature.
So a lot of people crank it up as high as they can get and they ll get it up to 140.
This is a very important factor in the type of tankless heater you buy.
Consider that if you live in the southern united states your groundwater might be 65 to 70 degrees while if you live in the north like minnesota wisconsin canada your groundwater may be only 40 degrees.
Resist deposition of mineral hard water buildup mineral deposition like lime inside the hot water tank and plumbing pipes.
There is a possibility that they might have become clogged because of mineral deposits.