Amana ACES80, Service Instructions Manual

TROUBLESHOOTING

37

1

Integrated control module will automatically attempt to reset from lockout after one hour.

2

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

• Circulator blower runs 

continuously. No furnace 

operation.

• Integrated control 

module diagnostic 

LED 

is flashing 

FOUR 

(4) 

flashes.

• Primary limit circuit 

is open.

• Check primary limit. 

Replace if necessary.

• Check filters and 

ductwork for blockage. 

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 

limit with proper 

replacement part.

• Replace blow-

er with correct 

replacement part.

4

4 FLASHES

• Faulty primary limit switch.

• Insufficient conditioned air 

over the heat exchanger. 

Blocked filters, restrictive 

ductwork, improper circula-

tor blower speed, or failed 

circulator blower.

• Loose or improperly con-

nected wiring.

Fault Description(s)

Possible Causes

Corrective Action

Cautions and 

Notes

Symptoms of Abnormal 

Operation

Associated
LED Code

2

• Normal furnace opera-

tion.

• Integrated control 

module diagnostic 

LED 

is flashing 

SEVEN 

(7) 

flashes.

• Flame sense micro-

amp signal is low.

• Clean 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.

• Clean flame sen

-

sor 

• See “Vent/Flue 

Pipe” section for 

piping details.

• See rating plate 

for proper gas 

pressure.

7

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 

circulation 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

5 FLASHES

• Short to ground in flame 

sense circuit.

• Circulator blower runs 

continuously. No furnace 

operation.

• Integrated control mod-

ule diagnostic 

LED 

is 

flashing 

SIX 

(6) flashes.

• Rollout limit circuit is 

open.

• Check burners for proper 

alignment.

• Check flue and air inlet 

piping for blockage, prop-
er length, elbows, and 
termination. Correct as 
necessary.

• Check rollout limit. Re-

place if necessary.

• Check induced draft blow-

er for proper performance.  
Replace, if necessary.

• Tighten or correct wiring 

connection.

• 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.

6

6 FLASHES

• Flame rollout.
• Misaligned burners, blocked 

flue and/or air inlet pipe, or 

failed induced draft blower.

• Loose or improperly con-

nected wiring.

• Faulty rollout limit.

• Furnace fails to operate.
• Integrated control mod-

ule diagnostic 

LED 

is 

flashing 

continuously

.

• Polarity of 115 or 

24 volt power is 

reversed.

• Review wiring diagram 

to correct polarity.

• Reverse orange and 

gray wires going to 

transformer.

• Verify proper ground. 

Correct if necessary.

• Turn power OFF 

prior to repair.

C

CONTINUOUS/

RAPID FLASH

• Polarity of 115 volt AC pow-

er to furnace or integrated 

control module is reversed.

• Orange and gray wires to 

transformer are reversed.

• Poor unit ground.

PCBBF145(S) CONTROL BOARD