49-6000243 Rev. 0
17
Troubleshooting
Before you call for service....
Save time and money! Review the chart below first and you may not need to call for service.
CAUTION
For your safety,
DO NOT
attempt repair of electrical wiring, controls, heating elements or other
safety devices. Refer repairs to qualified service personnel.
Problem
Possible Causes
What To do
Digital display is not
activated
No power or incorrect wiring
Check breakers at main electrical panel to ensure it is not tripped. If tripped, reset
breaker. Check that water heater is wired correctly.
Not enough flow
Turn on hot water at fixture.
No hot water
No power or incorrect wiring
Check breakers at main electrical panel to ensure it is not tripped. If tripped, reset
breaker. Check that water heater is wired correctly.
Overtemperature protection has
been triggered
The water heater is equipped with software that turns off the heating elements
when water temperatures reach a dangerous level. Turn off hot water, wait
several minutes for water to cool.
Flow rate is too low
Each model water heater has an activation flow rate. If the water flow is less than
this flow level, unit will not heat water. Increase the flow rate.
Hot water supply is warm,
but it does not get hot
Temperature set point is too low
Increase the temperature set point, Be cautious of scald risk.
Flow rate is too high
Reduce flow rate.
Voltage less than 240 VAC (120
VAC for GE04SNLPDG)
The heating elements on your water heater are designed for 240 VAC
applications. When used a lower voltage, the water heater will produce less hot
water.
No power or incorrect wiring
Check breakers at main electrical panel to ensure it is not tripped. If tripped, reset
breaker. Check that water heater is wired correctly.
Mixing too much cold water
Tankless water heaters do not require mixing as much cold water as a
conventional storage water heater. Adjust handle of fixture or mixing valve on
faucet to reduce the amount of cold water mixed.
Cold inlet temperature may be
lower during winter months
This is normal. The colder inlet water requires more heat to reach the
temperature set point. Increase the temerature set point.
Water is too hot
Temperature set point too high
Reduce temperature set point.
Remote control is not
working
Batteries are dead
Replace with new batteries.
Batteries are installed incorrectly
Ensure batteries are installed in the correct orientation.
NOTE:
If your water heater runs out of water too quickly or hot water supply is not hot enough, it may be too small for
your needs. Consider replacing it with a larger model or adding additional water heaters to meet flow demand needs.
Fault Codes
Fault Code Displayed Condition
Action
E0
Signal failure
Call Service
E1
Over temperature protection
Wait for water to cool, power ON/OFF
E3
Inlet temperature sensor failure
Call Service
E4
Outlet temperature sensor failure
Call Service
TROUBLESHOOTING
