TROUBLESHOOTING GUIDE
Disconnect the electrical power before servicing the water heater. Service should only be performed by a
qualified service technician. Failure to follow these instructions can result in personal injury and/or death.
WARNING
AVERTISSEMENT
DANGER
CONDITION (code#)
CAUSE
REMEDY
1
An open earth ground circuit
to the ignition.
1) Check that the earth ground conductor is properly connected at the fuse box or break-
er panel and the water heater.
2) Check that the grounding conductors on the water heater are properly connected and
secure.
2
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.
3
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.
4
The pressure switch remained
open longer than 5 seconds
after the power venter was
energized.
(see note at the bottom of the page)
1) The pressure switch wiring is incorrect.
2) The pressure switch tubing is not connected correctly.
3) There are obstructions or restrictions in the water heater air intake or exhaust flue.
5
The self diagnostic test has
detected an error in the hot
surface ignitor circuit.
1) Check the 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.
3) If the above checks are good, replace the gas control valve.
6
The maximum number of
ignition retries or recycles has
been reached and the system
is in lockout.
1) Check if the gas supply is off or too low to operate.
2) Check the flame sensor rod to see that it is located properly and free from contamina-
tion. Reposition the flame sensor rod or lightly clean it with an abrasive cloth.
3) The hot surface ignitor may not be positioned correctly. Reposition as necessary.
4) Check that the hot surface ignitor and flame sensor rod are wired correctly and in good
working condition.
5) Low voltage to the water heater. Check and repair.
7
The gas valve driver circuit.
1) Turn off the power to the water heater for 10 seconds and then back on.
2) If the above step did not clear the error, replace the gas control valve.
8
The internal microcomputer.
1) Turn off the power to the water heater for 10 seconds and then back on.
2) If the above step did not clear the error, replace the gas control valve.
9
The internal circuit.
1) Turn off the power to the water heater for 10 seconds and then back on
2) If the above step did not clear the error, replace the gas control valve.
10
Flame signal sensed out of
proper sequence.
Replace the gas control valve.
11
The high temperature thermal
cutoff is open.
Replace the gas control valve.
12
One of the temperature adjust
buttons 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) If the above actions do not clear the error, the control will continue to regulate the
water temperature at the last setting, but you will not be able to change settings
unless you replace the gas control valve.
13
The water temperature sensor
is either open or
short-circuited.
1) Check that all of the wiring is correct and that there are no open or shorted circuits.
2) If no wiring problems are found, the gas control valve must be replaced.
14
The self-diagnostic test found
aproblem with the flame
vapour sensor
1) Check that all wiring is correct and that there are no open or shorted circuits.
2) If no wiring problems are found, the flammable vapour sensor must be replaced.
15
The control detected the
presence of flammable
vapours near the appliance
and entered lockout.
1) Identify the source of the flammable vapours and remove it from the area surrounding
the water heater
2) Contact a qualified service technician or the gas supplier to have the water heater
inspected immediately
Note for models with a manual reset only: Since the high limit switch on the blower is in series with the pressure switch, the problem could be that
the high limit switch tripped. Reset the high limit Switch by pressing on the red button in the middle of the switch.
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