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SECTION VII: TROUBLESHOOTING (cont.)
Table 11:
Control LED Codes
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
B
C
D
E
F
Error 13
Water temperature sensor is either open or short
circuited.
1) Check that all wiring is correct and secure.
2) Replace the combination control / gas valve.
Error 11
The high temperature thermal cutoff (ECO) is open.
1) ECO will automatically reset (or close) when the water
temperature drops to 120°F or below. The water heater thermostat
will automatically reset following a three minute standby period once
the ECO switch closes.
Error 12
One of the temperature adjust bottons is stuck closed.
1) Make sure that there are no objects leaning against the front of
the control.
2) Lightly press and release each of the buttons once.
3) Replace the combination control / gas valve.
Error 9
Problem with the internal circuit.
1) Turn off power to the water heater for 10 seconds, then turn
power on.
2) Replace the combination control / gas valve.
Error 10
Flame signal sensed out of proper sequence.
1) Replace the combination control / gas valve.
Error 7
Problem with the gas valve driver circuit.
1) Turn off power to the water heater for 10 seconds, then turn
power on.
2) Replace the combination control / gas valve.
Error 8
Problem with the internal microcomputer.
1) Turn off power to the water heater for 10 seconds, then turn
power on.
2) Replace the combination control / gas valve.
Error 6
1) Gas supply is off or inlet gas pressure is too low to operate. Turn
on gas supply and/or increase inlet gas pressure within specified
range.
2) Hot surface ignitor and flame rod assembly not positioned
correctly.
3) Electric polarity to unit is incorrect - test and correct.
4) Low voltage to the water heater. Supply voltage must equal rated
voltage.
5) Check the vent and combustion air intake systems for blockage.
The maximum number of ignition retries or recyles has
been reached and the system is in lockout.
Error 4
The pressure switch(es) remained open longer than 5
seconds after the combustion blower was energized.
1) Check wiring to the pressure switch(es).
2) Verify that pressure switch tubing is connected correctly.
3) Check the vent and combustion air intake systems for blockage.
Error 5
Error in the hot surface ignitor circuit.
1) Check that all wiring is correct and secure.
2) Disconnect the ignitor connector and measure the ignitor
resistance with an accurate ohmmeter between pins 1 and 2.
Resistance should be between 11.5 and 18.8 ohms. If the reading
is incorrect, replace the hot surface ignitor.
Error 2
Error 3
Open earth ground circuit to the ignition system.
1) Check that the earth ground conductor is properly connected at
the fuse box or breaker panel and the water heater.
2) Check that the grounding conductors on the water heater are
properly connected and secure.
The self diagnostic test detected a wiring error or a high
resistance to earth ground.
1) Check for proper connection of the line neutral and line hot wires.
2) Check that the water heater is securely connected to earth
ground.
The pressure switch remained closed longer than 5
seconds after the call for heat began.
1) The pressure switch wiring is incorrect.
2) The pressure switch is defective and must be replaced.
LED Error Code
Problem
Solution
Error 1
