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Trouble shooting
23
Electric tankless water heater - Installation Maunal and User Guide
TM
Troubleshooting
Problem Cause Solution
Water heater is heating, but
the water temperature is
not hot enough.
User temperature
setting too low.
Increase the temperature setting on
the unit.
Flow rate is too
high.
Depending on your incoming water
temperature and the kW of your
heater, your water flow rate may
exceed the physical heating
capacity of your water heater.
Reduce the flow rate by installing a
Flow Regulator.
Crossed wires.
If it’s a new installation, have your
electrician double check the wiring.
Is possible that the wiring is
incorrect.
Voltage less than
240 volts.
The heating elements on your water
heater are design for 240 volts.
When used with a lower voltage,
they produce less heating power.
You may need to upgrade to a
larger input heater.
Mixing too much
cold water.
You do not need to mix as much
cold water with your tankless water
heater compared to when you use a
conventional water heater. You may
also have an anti-scald feature on
your faucet that is mixing cold
water. These types of faucets can
usually be adjusted to reduce the
amount of cold water mixed.
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