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Before you call for service…
Problem Possible Causes What To Do
Relief valve producing Pressure buildup caused • This is an unacceptable condition and must be corrected.
popping noise by thermal expansion Contact the water supplier or plumbing contractor on how
or draining to a closed system. to correct this. Do not plug the relief valve outlet.
The heater is beeping The water heater has not • Fill the tank completely with water. Press ENTER to stop
and the screen says been filled with water before the alarm and then press POWER when the tank has been
“Attention! Tank not powering up. Powering up the filled.
filled!” heater without water will
damage the electric heaters.
The water heater warranty
does not cover damage or
failure resulting from operation
with an empty or partially
empty tank.
The filter light is on. The filter requires cleaning. • Follow the instructions on how to remove and clean the
A clean filter is necessary for filter on page 13.
effective operation.
The heater is beeping There is an issue with the • The unit will automatically switch to another available
and the screen says heat pump system. mode to ensure you continue to have hot water. Contact
“Heat Pump Failure” service immediately and give them the codes listed on the
display screen.
The heater is beeping There is an issue with the • The unit will automatically switch to another available
and the screen says water heater system. mode to ensure you continue to have hot water. Contact
“Water Heater Failure” service immediately and give them the codes listed on the
display screen.
The heater is beeping There is an issue with the • The heater will need to turn off. Contact service immediately.
and the screen says water heater that requires
“System Failure” immediate attention.
Unit is not making If unit is using resistance • Check mode of unit.
noise elements, it will not make
noise.
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