lp-441 Rev. 004 Rel. 000 Date 7.2.21
43
The water heater has wire function labels on all internal wiring. Observe the position of each wire before removing it. Wiring errors may
cause improper and dangerous operation. Verify proper operation after servicing.
Control Board Blocking Errors
Code
Short Description
Long Description
Corrective Action
E07
Flue Temperature Too High
The flue temperature has met /
surpassed the maximum limit.
1. Is the tank full of water? This error code will appear if the tank is
dry-fired.
2. Measure actual Flue temperature.
3. Use an ohmmeter to check resistance on flue temperature sensor.
4. Replace sensor if it does not pass the resistance test.
5. If Flue temperature does not return to normal within 15 minutes,
this error shall become an F07 fault code.
6. Error will clear automatically if Flue temperature returns to normal
within 15 minutes.
E13
Remote Reset Volatile
Lockout
The FIVE RESETS counter has been
reached.
Service and repair unit per displayed error code. Turn the main power
supply to the unit off and back on to clear out the error code.
E25
Software Error
Indicates that there is an issue with
the control software, usually due to a
power surge or spike.
Replace the control. Install a surge protector to protect the water
heater. This is best practice for all appliance installations.
E34
Low Main Power Supply
The main power supply is too low
(below 75 VAC) to properly power the
water heater.
1. When main power is brought back to a normal state (over 75 VAC),
water heater will resume normal operation.
2. Measure AC mains.
E39
Outdoor Temperature Sensor
Error
(When Enabled)
The outdoor temperature sensor
is out of normal operating range,
meaning the sensor is either open
or shorted for more than 3 seconds.
The E39 code will flash and alternate
with the DHW set point, ensuring the
system continues to supply hot water.
1. If the Outdoor Temperature Sensor returns to normal operating
range, this error code will clear on its own. Normal operating range of
the sensor is -40
o
F – 122
o
F.
2. Check the Outdoor Temperature Sensor. Ensure it is properly wired
and connected, and that there are no breaks, cuts, or other visible
issues with the sensor wire.
3. Use an ohmmeter to check resistance on the outdoor temperature
sensor.
4. Replace Outdoor Temperature Sensor if it fails the resistance test.
E53
Flue Temperature Sensor
Error
The flue temperature sensor is out of
normal operating range, meaning the
sensor is either open or shorted.
1. Check the Flue Temperature Sensor. Ensure it is properly wired to
the control, and that there are no breaks, cuts, or other visible issues
with the sensor wire.
2. Use an ohmmeter to check resistance on flue temperature sensor.
3. Replace Flue Temperature Sensor if it does not pass the resistance
test.
E64
Blocked Flue
The control detects a blocked flue
condition.
1. Check the Flue termination. Ensure there are no blockages or
obstructions in the Flue.
2. Check APS switch. Ensure it is properly wired to the control, and
that there are no breaks, cuts, or other visible issues with the wiring.
3. Replace APS switch.
Table 21 - Blocking Error Codes
Control Board Blocking Errors
Code
Short Description
Long Description
Corrective Action
F01
Ignition Lockout Indication
The control senses no flame after
three ignition attempts.
1. Is the gas turned on to the water heater?
2. Manually reset the water heater.
3. Observe water heater operation. If fault code occurs again:
4. Check for stable gas pressure.
5. Check ignitor cable connections.
6. Check ignitor cable ground.
7. Replace cable.
8. Check spark gap between spark electrode and burner.
9. Replace ignitor.
F02
False Flame Indication
The control senses a flame signal
when there is no heat demand.
1. Visually check for flame through the sight glass.
2. Manually reset the water heater.
3. Observe water heater operation. If fault code occurs again:
4. Check ignitor cable connections.
5. Check ignitor cable ground.
6. Replace cable.
7. Replace ignitor.