Diagnostic Chart - Whirlpool WGFM195 Installation Instructions Manual

To avoid personal injury or death due to electrical shock, disconnect electrical power
before performing any service or maintenance.
The red diagnostic LED blinks to assist in troubleshooting the uit. The number of blinks refers to a specific fault code.
Symptoms of
Abnormal Associated
Operation LED Code Fault Description Possible Causes
Furnace fails to None
operate.
Integrated
control module
diagnostic LED
display
provides no
signal.
LED display is Continuous
steady on On
Furnace fails to 1 flash
operate.
Integrated
control module
diagnostic LED
is flashing
1 flash.
Furnace fails to 2 flashes
operate.
Integrated
control module
diagnostic LED
is flashing 2
flashes.
40

Diagnostic Chart

WARNING
HIGH VOLTAGE!
No 115-volt Manual disconnect
power to switch Off, door switch
furnace, or no open or 24-volt wire
24-volt power to improperly connected or
integrated loose.
control module.
Blown fuse or circuit
Blown fuse or breaker
circuit breaker.
Integrated control
Internal fault in module has an internal
Integrated fault.
control module.
Normal Normal operation
operation
Furnace lockout Failure to establish
due to an flame. No gas to
burners, front cover
excessive
pressure switch stuck
number of
open, bad igniter or
ignition "retries"
igniter alignment,
(3 total).
improper orifices or
coated/oxidized or
improperly connected
flame sensor.
Loss of flame after
establishment.
Interrupted gas supply,
lazy burner flames
(improper gas pressure
or restriction in flue and/
or combustion air
piping), front cover
pressure switch
opening, or improper
induced draft blower
performance.
Pressure switch Induced draft blower
circuit is closed. pressure switch
contacts sticking.
Induced draft
blower is not Shorts in pressure
operating. switch circuit.
Corrective Actions
Assure 115-volt power
to the furnace, and
24-volt power to
integrated control
module
Check integrated
control module fuse.
Replace with 3A
automotive fuse, if
necessary.
Check for possible
shorts in 115-volt and
24-volt circuits. Repair
as necessary.
Replace bad
integrated control
module.
None
Locate and correct gas
interruption.
Check front cover
pressure switch
operation (hose, wiring,
contact operation).
Correct if necessary.
Replace or realign
igniter. Igniter is fragile,
handle gently.
Check flame sense
signal. Sand sensor if
coated and/or oxidized.
Check flue piping for
blockage, proper
length, elbows and
termination.
Verify proper induced
draft blower
performance.
Replace induced draft
blower pressure
switch.
Repair short.
Notes and
Cautions
Turn off power
prior to repair.
Replace
integrated control
module fuse with
3A automotive
fuse.
Read precautions
in "Electrostatic
Discharge"
section of manual.
Replace
integrated control
module with
current
replacement
parts.
Normal operation
Turn off power
prior to repair.
Igniter is fragile,
handle with care.
Sand flame
sensor with
emery cloth.
See "Vent/Flue
Pipe" section for
piping details.
Turn off power
prior to repair.
Replace pressure
switch with
correct
replacement part.