With tankless water heaters temperature fluctuations are commonly caused by restrictions on the flow of hot water.
Tankless water heater water temperature.
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.
Mixing hot and cold water to the right temperature from.
This is a very important factor in the type of tankless heater you buy.
So a lot of people crank it up as high as they can get and they ll get it up to 140.
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.
There is a possibility that they might have become clogged because of mineral deposits.
If you believe that this might be the source of your problem carefully inspect all of your shower heads faucet aerators and plumbing fixtures.
Similarly unlike with a tank heater the hot water temperature from a non modulated tankless heater is inversely proportional to the rate of the water flow the faster the flow the less time the water spends in the heating element being heated.
Maintaining constant shower temperature.
Resist deposition of mineral hard water buildup mineral deposition like lime inside the hot water tank and plumbing pipes.