Fault Code
Condition
Displayed
Lower heating element failure. Control energizes lower
F10
Upper heating element failure. Control energizes Upper
F11
F12
Lower heating element failure.
F13
Upper heating element failure.
Mixing Valve Outlet DC TCO tripped. Outlet DC TCO reading
F16**
is low, indicating TCO tripped.
Jumper wire missing on non-EMV model. (12V not present)
F17
Mixing Valve Failure. Means mixing valve is not able to control
outlet temperature and NOT due to elevated inlet temperature
F18**
or ambient. Disables mixing valve mode and controls T2 to
user setpoint until serviced (normal mode).
Runaway Heat Source (leads to a ECO trip). Idle Over-
F19
Current (Current present when no loads are on.).
T1 tank temperature sensor failure (open/short). T1 Sensor is
F30
beyond normal 32°F - 180°F temperature range.
T2 tank temperature sensor failure (open/short). T2 sensor is
F31
beyond normal 32°F - 180°F temperature range.
T1 or T2 tank temperature sensor failure. Thermistor accuracy
F32 or
issue.
F33
T6 EMV Water Outlet temperature sensor failure (open/short
F38**
or T6 sensor is beyond normal 32°F - 180°F temperature
range.
T7 EMV Water inlet temperature sensor failure (open/short or
F39**
T7 sensor is beyond normal 32°F - 180°F temperature range.
Current Sensor Failure (current sensor open/short)
F40
Anode miswired conditioned or shorted to ground.
F41*
Leak Detector Sensor Failure - open/short (when using leak
F43
detection accessory module)
Adjacent pins on micro out of range (T1 vs. T2)
F44
Adjacent pins on micro out of range (T6 vs. T7)
F45
F60
AC Power detection failure
F61
Tank regulation fault
Incoming cold water too hot.
F62
F63 or
UL Mixing Valve failure
F64**
Anode Depleted. Anode text is illuminated, and the audible
alarm is sounding. The control has calculated that the anode
F70*
rod has been mostly consumerd or the time in operation has
exceded the replacement timeline threshold.
Current transformer miswired. F10 and F11 fault codes have
F71
all occurred during the same heating cycle.
Low line voltage during operation. Sagging voltage occurs
F72
over time, not at power-up, like fault F76.
The voltage is too low at power-up. The control monitors the
F76
input line voltage, and if the voltage is below 155V, the fault
code will be displayed.
Stuck Key fault. This indicates there is a button on the front
panel that is stuck down (longer than 30 seconds). This button
F77
is inoperable. Other buttons work normally. If the button
becomes free, the fault code will clear by itself.
Water Leak Detected (when using leak detection accessory
F78
module).
E2 personality module is unplugged. Unit will continue to
F90
operate using previously stored personality on Control Board.
F91
New E2 plug detected (0 personality value).
F92
are not the same).
F93
replaced and neither have an assigned Personality).
WiFi Daughter Board Failure
F94
* Applicable to models with sensing Anode
**Applicable to models with integrated Electronic Mixing Valve (EMV)
Check
Check respective heating element and wiring connections at element and control. Use
service mode to cycle element and check current draw. Control assembly may have failed
otherwise.
Check respective heating element and replace as required. Use service mode to cycle
element and check current draw. Control assembly may have failed, otherwise.
correction. Mixing valve, sensors, or electronic control may require replacement to correct
over temperature condition.
Non-EMV models: Ensure non-EMV model jumper is present and connected correctly. Install
Jumper wire, if missing (part of J802 connector plug).
control are correct. Replace mixing valve components if connections are correct.
If ECO trips with F19 Fault, then defective relay on board. Replace control board and
manually reset ECO. If ECO trips with no F19 fault, then defective thermistor.
Check T1 sensor mounting, wiring and resistance. Use service mode to monitor T1 sensor
temperature. If T1 sensor checks OK, control assembly may have failed.
Check T2 sensor mounting, wiring and resistance. Use service mode to monitor T2 sensor
temperature. If T2 sensor checks OK, control assembly may have failed.
Check both T1 and T2 thermistors wiring and mounting to determine cause for discrepancy.
If no assembly issue found, monitor thermistor readings in service mode (comparing to actual
water temperature) and replace inaccurate thermistor.
Check T6 sensor mounting, wiring and resistance. Use service mode to monitor T6 sensor
temperature.
Check T7 sensor mounting, wiring and resistance. Use service mode to monitor T7 sensor
temperature.
required. If no visible damage, replace control (making sure black L1 wire is threaded
through sensor).
Check to ensure the tank is full of water (fault may occur if tank is empty). Check anode
and anode wire connections (on the board and at the anode rod). Check if any thermistor
connections are shorted to earth ground. Check if anode is shorted to tank.
module and wiring as required.
Replace thermistors if out of range, otherwise replace electronic control.
Replace thermistors if out of range, otherwise replace electronic control.
Agency required fault. No Service action required.
Agency required Fault. No Service action required.
Check accuracy of inlet water temperature. Unit may have supplimental water heater in
circuit (such as solar water heater).
control are correct. Replace mixing valve components if connections are correct.
application. Alarm can be silenced by pressing Anode "Hold to Reset" button once. Depress
and Hold reset button for 5 seconds after anode replacement (resets anode life to 100%).
Check that black L1 wire passes through the current sensor and that current sensor
connector (J301) is plugged in. If correct (and there is no damage to wiring), the control cord
needs to be replaced.
Check incoming line voltage within +10/-15% of either 208 or 240 VAC, depending upon
power supply. The detected voltage can be viewed in "Monitor Mode". Check heating
elements are not shorted to ground.
Check electrical supply line connections. Voltage should measure within +10/-15% of either
208 or 240 VAC, depending upon power supply, The detected Voltage reading can be viewed
in "Monitor Mode". Check heating elements are not shorted to ground.
Check to see if all buttons are operable. Ensure control board is properly seated and
mounting screws are not overtightened (loosen screws and hand tighten lightly). Replace
control board, if issue persists.
board or replace if damaged. Personality can be entered in "Personality Mode", if PCB
information is not correct.
Cycle Power. E2 module will be programmed with stored information from control board.
No service action required. Control will update based on E2 module information.
Assign correct Personality within Personality Mode (see Personality Table for correct ID).
GEAppliances.com/connect). Check terminal connection J602 to WiFi board. Replace WiFi
Mixing Valve
Thermostat
Cut Out (155F)
Cold Water
One Shot
EMV stepper
EMV Front
motor &
/ Rear
drive asm
Shrouds
Anode rod
access
(if equipped)
•
• •
• •
J807
J301
Sensor Output
BLUE
• •
T1
1
5VDC
BLUE
Sensor Output
•
RED
T2
5VDC
RED
•
• •
MAIN BOARD
6
e2 Personality
module
Sensor Output
• •
AQUA
1
T7
5VDC
AQUA
Sensor Output
• •
RED
T6
5VDC
RED
12.5VDC Pulsing
• •
ORANGE
MIXING
12.5VDC Pulsing
BROWN
• •
VALVE
12.5VDC Pulsing
AQUA
12.5VDC Pulsing
YELLOW
• •
12.5VDC Constant
RED
K402
5VDC
BLACK
TCO
•
TCO Status
BLACK
11
NO
(if equipped)
•
• •
1
M401
• •
• •
• •
• •
BLACK
•
BLACK
11
Non-EMV models: Use
Line 1
J802 Jumper plug
• •
• •
J602
ECO HI
LIMIT(180F)
Resettable
K401
NO
COM
COM
•
•
M402
•
•
NC
M403
UPPER ELEMENT
Line 1
YELLOW
•
•
~22.9 A
5500W 10.5
LOWER ELEMENT
PURPLE
•
•
5500W 10.5
~22.9 A
31-6000228 Rev. 1
L1 L2
1
3
2
4
Line 2
Line 2
07-20