Amana AMH95 Instruction Manual download pdf (Page 35)

• Polarity of 115 volt AC

power to furnace or

integrated control module is

reversed.

• Orange and gray wires to

transformer are reversed.

• Poor unit ground.

• Circulator blower runs

continuously. No furnace

operation.

• Integrated control module

diagnostic LED is

flashing FOUR (4)

flashes.

• Primary or auxiliary

limit circuit is open.

• Check primary/

auxiliary limit. Replace

if necessary.

• Check filters and

ductwork for block-

age. Clean filters or

remove obstruction.

• Check circulator

blower speed and

performance. Correct

speed or replace

blower if necessary.

• Tighten or correct

wiring connection.

• Turn power OFF

prior to repair.

• Replace primary/

auxiliary switch

with proper

replacement part.

• Replace blower

with correct

replacement part.

4 FLASHES

• Insufficient conditioned air

over the heat exchanger.

Blocked filters, restrictive

ductwork, improper

circulator blower speed, or

failed circulator blower.

• Faulty primary or auxiliary

limit switch.

• Loose or improperly

connected wiring.

Fault Description(s) Possible Causes Corrective Action Cautions and Notes

Symptoms of Abnormal

Operation

Associated

LED Code

Troubleshooting Chart

• Normal furnace

operation.

• Integrated control

module diagnostic

LED is flashing

SEVEN (7) flashes.

• Flame sense

microamp signal is

low.

• Sand flame sensor if

coated/oxidized.

• Inspect for

proper sensor

alignment.

• Check inlet air piping

for blockage, proper

length, elbows, and

termination.

• Compare current gas

pressure to rating plate

info. Adjust as needed.

• Turn power OFF

prior to repair.

• Sand flame sensor

with emery clot.

• See “Vent/Flue

Pipe” section for

piping details.

• See rating plate for

proper gas

pressure.

7 FLASHES

• Flame sensor is coated/

oxidized.

• Flame sensor incorrectly

positioned in burner flame.

• Lazy burner flame due to

improper gas pressure or

combustion air.

• Induced draft blower,

and circulator blower

runs continuously. No

furnace operation.

• Integrated control module

diagnostic LED is

flashing FIVE (5) flashes.

• Flame sensed with

no call for heat.

• Correct short at flame

sensor or in flame

sensor wiring.

• Turn power OFF

prior to repair.

5 FLASHES

• Short to ground in flame

sense circuit.

• Circulator blower runs

continuously. No furnace

operation.

• Integrated control module

diagnostic LED is

flashing SIX (6) flashes.

• No furnace operation.

• Rollout limit circuit is

open.

• Integrated control

module fuse is

blown.

• Check burners for

proper alignment.

• Check flue and air inlet

piping for blockage,

proper length, elbows,

and termination.

Correct as necessary.

• Check induced draft

blower for proper

performance. Replace,

if necessary.

• Tighten or correct

wiring connection.

• Repair short in 24 volt

AC control/safety

circuit(s)

• Replace integrated

control module fuse

(3A).

• Turn power OFF

prior to repair.

• See “Vent/Flue

Pipe” section for

piping details.

• Replace rollout limit

with correct

replacement part.

• Replace induced

draft blower with

correct replace-

ment part.

• Replace integrated

control module

fuse with 3A

automotive fuse.

• Read precautions

in “Electrostatic

Discharge” section

of manual

6 FLASHES

• Flame rollout.

• Misaligned burners, blocked

flue and/or air inlet pipe, or

failed induced draft blower.

• Loose or improperly

connected wiring.

• Faulty rollout limit.

• Short in 24 volt AC control

circuits or safety circuits.

• Furnace fails to

operate.

• Integrated control

module diagnostic LED

is flashing continu-

ously.

• Polarity of 115 or 24

volt power is

reversed.

• Review wiring diagram

to correct polarity.

• Reverse orange and

gray wires connected

to transformer.

• Verify proper ground.

Correct if necessary.

• Turn power OFF

prior to repair.

CONTINUOUS/

RAPID FLASH

LED Flash code will cease if power to the control module is interrupted through the disconnect or door switch.

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Amana AMH95 Instruction Manual Page 35

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