24
TROUBLESHOOTING GUIDE
CONDITION (code#) CAUSE
CORRECTIVE ACTION
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.
1
An open earth ground circuit to the ignition.
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.
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 properly connected.
3) There are obstructions or restrictions in the water heater air intake or exhaust flue.
5
The self diagnosing 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.
6
The maximum number of ignition retries or
recycles has been reached and the system is
in lock-out mode.
1) Check if the gas supply is off or too low to operate.
2) Check the flame sensor rod to see if it is located properly and free from contamination. 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.
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.
9
The internal circuit.
1) Turn off the power to the water heater for 10 seconds, verify the polarity and then back on
2) If the above step did not clear the error, replace the gas control.
10
Flame signal sensed out of proper sequence.
Replace the gas control.
11
The high temperature thermal cut-off is
open.
Replace the gas control.
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.
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 short circuits.
2) If no wiring problems are found, the gas control must be replaced.
14
The self-diagnosing test found a problem
with the flammable vapour sensor.
1) Check that all wiring is correct and that there are no open or short circuits.
2) If no wiring problems are found, the flammable vapour sensor must be replaced.
15
The control detected the presence of flam-
mable vapours near the appliance and
entered lock-out mode.
1) Identify the source of the flammable vapours and remove it from the area surrounding the water heater.
2) Contact a service technician to have the water heater inspected immediately.
16
Weak Flame Current.
1) Check that the flame sense rod to see if it is properly located and free from contamination. Reposition the flame
sense rod or lightly clean with an abrasive cloth.
2) Low voltage to the water heater. Check and repair.
DANGER
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
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.
