Whirlpool WPIO-369B Instruction Manual download pdf (Page 35)

35

■ Furnace fails to

operate on high

stage. Furnace

operates

normally on low

stage.

■ Integrated

control module

LED display

provides “E9”

error code.

E9

■ High-stage

pressure switch

circuit is not

closed.

■ Induced draft

blower is

operating.

■ Furnace is

operating on

low stage only.

■ Pressure switch

hose blocked,

pinched or

connected

improperly.

■ Blocked flue and/or

inlet air pipe,

blocked drain

system or weak

induced draft

blower.

■ Incorrect pressure

switch setpoint or

malfunctioning

switch contacts.

■ Loose or

improperly

connected wiring.

■ Inspect pressure

switch hose. Repair, if

necessary.

■ Inspect flue and/or

inlet air piping for

blockage, proper

length, elbows and

termination.

■ Check drain system.

Correct as necessary.

■ Check induced draft

blower performance.

Correct as necessary.

■ Correct pressure

switch setpoint or

contact motion.

■ Tighten or correct

wiring connection.

■ Turn off power prior to

repair.

■ Replace pressure

switch with correct

replacement part.

■ Replace induced draft

blower with correct

replacement part.

■ Furnace fails to

operate.

■ Integrated

control module

LED display

provides “EA”

error code.

EA

■ Polarity of

115-volt AC is

reversed.

■ Polarity of 115-volt

AC power to

furnace or

integrated module

is reversed.

■ Poor furnace

ground.

■ Review wiring diagram

to correct polarity.

■ Verify proper ground.

Correct if necessary.

■ Check and correct

wiring.

■ Turn off power prior to

repair.

■ Furnace fails to

operate.

■ Integrated

control module

LED display

provides “d0”

error code.

d0

■ Data not yet on

network.

■ Furnace does not

contain any shared

data.

■ Populate shared data

set using memory

card.

■ Turn off power prior to

repair.

■ Use memory card for

the specific model.

■ Insert memory card

before turning on

power. Memory card

may be removed after

data is loaded.

■ Turn off power before

removing memory

card.

■ Error code will be

cleared once data is

loaded.

■ Operation

different than

expected or no

operation.

■ Integrated

control module

LED display

provides “d4”

error code.

d4

■ Invalid memory

card data.

■ Shared data set on

memory card has

been rejected by

integrated control

module.

■ Verify shared data set

is correct for the

specific model.

■ Repopulate data using

correct memory card, if

required.

■ Turn off power prior to

repair.

■ Use memory card for

the specific model.

■ Insert memory card

before turning on

power. Memory card

may be removed after

data is loaded.

■ Turn off power before

removing memory

card.

■ Error code will be

cleared once data is

loaded.

Symptoms of

Abnormal

Operation

Diagnostic/

Status LED

Code Fault Description Possible Causes Corrective Actions Notes and Cautions

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