Does induced draft blower
operate?
Error code #29 on display. Measure voltage at the pin
terminals on the control board between the black and white
wires to the blower (terminals 5 and 3 on the “inducer”
output on the board, see image ab ove). Make sure the
control display shows “heating” in the status mode.
Increase the setpoint, if it do es not show “heating”. Is ther e
110-120 volts to the bl ower harness?
Replace control board i f display
shows “heating” and no voltage is
present to the blower harness.
Make sure there are no codes for
the temperature sensors
(following sections) before
replacing control board.
If there is voltage from the
control board to the bl ower wire
harness? Check the voltage at
the connection to the blower.
Replace wire harness if there is
no voltage to the blower.
Replace blower, if the re is
voltage to the blower.
Is there pilot flame?
Error code #29 on display. Pressure switch did not close. Check for
blocked intake or exhaust vent s, damper stuck closed, or excessive
vent length. See section on “Ch ecking Pressure Switch”. If pre ssure
switch closes, and erro r code 62 appears on c ontrol display, pilo t is not
lighting or staying lit during the ignition cycle. Proceed t o the section
“Pilot Operation Testing”
Does Main Burner opera te? Error code #62 on displ ay. Se e pil ot li gh ts, n o fla me
signal in the section for “Pilot Operation T esting”
Does burner continue until
thermostat set point is reached?
See setting display in Se rvice Mode
and displaying temperatur e
sensors.
Error code #63 on display. See Main Burner short
cycles in the section under “Main Burner Operation
Testing”
Blower Stops shortly after burners
shut off.
System okay
TROUBLESHOOTING

CAUTION

Use Caution Not to Damage Connectors when making Voltage Measurements or Jumping Terminals

N
Y
N
N
N
Y
Y
Y
Y
From previous page
Example of error code shown on control dis play.
SELECT Lockout RESET
Status Service Needed

Error Code Shown

in Water Heater Display

N
8