Tappan
Tappan Furnaces Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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1 FLASH
Furnace will not start; LED on control board flashes 1 time repeatedly; inducer motor does not start.
Ignition Lockout / No Call for Heat Recognized
10 FLASH
Furnace shuts down unexpectedly; LED flashes 10 times repeatedly; may coincide with thermostat cycling off.
Flame Sense Error / Flame Present with Gas Off
11 FLASH
Furnace does not respond to thermostat; LED flashes 11 times repeatedly.
Limit Circuit Lockout / Exceeded Retry Attempts
12 FLASH
LED flashes 12 times; furnace may run but with intermittent issues such as random shutdowns.
Low 24V Control Voltage / Brownout Condition
13 FLASH
LED flashes 13 times; furnace may not start or may shut down mid-cycle.
Limit Circuit Open for Extended Time
2 FLASH
Furnace attempts to start but shuts down quickly; LED on Tappan control board flashes 2 times repeatedly.
Pressure Switch Stuck Closed
3 FLASH
Furnace starts inducer but does not light; LED flashes 3 times repeatedly; you may hear clicking from the ignitor but no flame.
Pressure Switch Stuck Open / Venting Problem
4 FLASH
Burners ignite briefly then shut off; LED flashes 4 times repeatedly; blower may run with no heat.
Open High Limit Switch
5 FLASH
Furnace lights but shuts down after a few seconds; LED flashes 5 times repeatedly; you may hear the ignitor click multiple times.
Flame Sensed but Lost / Flame Sensor Fault
6 FLASH
Inducer runs, but there is no ignition; LED flashes 6 times repeatedly; you may smell a faint gas odor near the furnace.
Ignition Failure / No Gas Flow
7 FLASH
Furnace locks out after several failed ignition attempts; LED flashes 7 times repeatedly; system may require power reset to retry.
Ignition Lockout Due to Repeated Failures
8 FLASH
Blower runs continuously with no heat; LED flashes 8 times repeatedly.
Stuck Open Limit or Rollout Switch
9 FLASH
Furnace will not start; LED flashes 9 times repeatedly; thermostat appears to be calling for heat.
Incorrect Line Voltage Polarity or Grounding
NO LED
No LED light on the Tappan control board; furnace completely dead; blower and inducer do not run.
No Power to Furnace / Blown Fuse
STEADY ON
LED on Tappan control board is solid ON with no flashes; furnace does not respond to thermostat.
Internal Control Board Failure / No Self-Diagnostics
Symptom
Furnace blower runs continuously even when thermostat is not calling for heat or fan.
Blower Stuck On
Symptom
Furnace cycles on and off rapidly (every few minutes) without fully heating the home.
Thermostat Short Cycling / Location Issue
Symptom
Furnace emits a metallic or rattling noise when the blower starts or stops.
Loose Panel or Ductwork
Symptom
Furnace ignites but the flame appears yellow and wavy instead of blue.
Improper Combustion / Insufficient Air
Symptom
Furnace inducer motor is very loud or grinding.
Failing Inducer Motor Bearings
Symptom
Furnace makes a loud rumbling or roaring noise while running.
Combustion Noise / Flame Instability
Symptom
Furnace makes loud banging or booming noise at startup.
Delayed Ignition
Symptom
Furnace occasionally fails to ignite on very cold days but works at other times.
Marginal Ignition System Performance
Symptom
Furnace occasionally trips the household circuit breaker.
Electrical Overload / Short Circuit
Symptom
Furnace produces a high-pitched squealing noise during operation.
Blower Motor or Belt Noise
Symptom
Furnace runs but does not produce enough heat; home never reaches set temperature.
Low Heat Output / Underfiring
Symptom
Furnace runs but house air feels cool or lukewarm from vents.
Low Supply Air Temperature
Symptom
Furnace runs but some rooms are much colder than others.
Uneven Heating / Airflow Imbalance
Symptom
Furnace shuts off and on with windy conditions outside.
Wind-Induced Venting Issues
Symptom
Furnace starts and runs for a few minutes, then shuts off and restarts frequently (short cycling).
Short Cycling on High Limit
Symptom
Furnace starts but shuts down when the blower comes on.
Flame Disturbance by Airflow
Symptom
Furnace vibrates excessively and causes rattling in ductwork.
Excessive Vibration / Imbalanced Blower Wheel
Symptom
Furnace will not start at all; thermostat appears to be working; LED shows normal idle code.
No Call for Heat from Thermostat
Symptom
Rust or water stains inside the burner compartment of a high-efficiency Tappan furnace.
Condensate Backflow into Heat Exchanger
Symptom
Strong burning or electrical smell when the furnace runs.
Overheating Components / Electrical Fault
Symptom
Thermostat display is blank and furnace does not run.
Loss of 24V Power to Thermostat
Symptom
Water leaking around the base of a high-efficiency Tappan furnace.
Condensate Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| 1 FLASH |
Furnace will not start; LED on control board flashes 1 time repeatedly; inducer motor does not start.
|
Ignition Lockout / No Call for Heat Recognized | View Details |
| 10 FLASH |
Furnace shuts down unexpectedly; LED flashes 10 times repeatedly; may coincide with thermostat cycling off.
|
Flame Sense Error / Flame Present with Gas Off | View Details |
| 11 FLASH |
Furnace does not respond to thermostat; LED flashes 11 times repeatedly.
|
Limit Circuit Lockout / Exceeded Retry Attempts | View Details |
| 12 FLASH |
LED flashes 12 times; furnace may run but with intermittent issues such as random shutdowns.
|
Low 24V Control Voltage / Brownout Condition | View Details |
| 13 FLASH |
LED flashes 13 times; furnace may not start or may shut down mid-cycle.
|
Limit Circuit Open for Extended Time | View Details |
| 2 FLASH |
Furnace attempts to start but shuts down quickly; LED on Tappan control board flashes 2 times repeatedly.
|
Pressure Switch Stuck Closed | View Details |
| 3 FLASH |
Furnace starts inducer but does not light; LED flashes 3 times repeatedly; you may hear clicking from the ignitor but no flame.
|
Pressure Switch Stuck Open / Venting Problem | View Details |
| 4 FLASH |
Burners ignite briefly then shut off; LED flashes 4 times repeatedly; blower may run with no heat.
|
Open High Limit Switch | View Details |
| 5 FLASH |
Furnace lights but shuts down after a few seconds; LED flashes 5 times repeatedly; you may hear the ignitor click multiple times.
|
Flame Sensed but Lost / Flame Sensor Fault | View Details |
| 6 FLASH |
Inducer runs, but there is no ignition; LED flashes 6 times repeatedly; you may smell a faint gas odor near the furnace.
|
Ignition Failure / No Gas Flow | View Details |
| 7 FLASH |
Furnace locks out after several failed ignition attempts; LED flashes 7 times repeatedly; system may require power reset to retry.
|
Ignition Lockout Due to Repeated Failures | View Details |
| 8 FLASH |
Blower runs continuously with no heat; LED flashes 8 times repeatedly.
|
Stuck Open Limit or Rollout Switch | View Details |
| 9 FLASH |
Furnace will not start; LED flashes 9 times repeatedly; thermostat appears to be calling for heat.
|
Incorrect Line Voltage Polarity or Grounding | View Details |
| NO LED |
No LED light on the Tappan control board; furnace completely dead; blower and inducer do not run.
|
No Power to Furnace / Blown Fuse | View Details |
| STEADY ON |
LED on Tappan control board is solid ON with no flashes; furnace does not respond to thermostat.
|
Internal Control Board Failure / No Self-Diagnostics | View Details |
| – |
Furnace blower runs continuously even when thermostat is not calling for heat or fan.
|
Blower Stuck On | View Details |
| – |
Furnace cycles on and off rapidly (every few minutes) without fully heating the home.
|
Thermostat Short Cycling / Location Issue | View Details |
| – |
Furnace emits a metallic or rattling noise when the blower starts or stops.
|
Loose Panel or Ductwork | View Details |
| – |
Furnace ignites but the flame appears yellow and wavy instead of blue.
|
Improper Combustion / Insufficient Air | View Details |
| – |
Furnace inducer motor is very loud or grinding.
|
Failing Inducer Motor Bearings | View Details |
| – |
Furnace makes a loud rumbling or roaring noise while running.
|
Combustion Noise / Flame Instability | View Details |
| – |
Furnace makes loud banging or booming noise at startup.
|
Delayed Ignition | View Details |
| – |
Furnace occasionally fails to ignite on very cold days but works at other times.
|
Marginal Ignition System Performance | View Details |
| – |
Furnace occasionally trips the household circuit breaker.
|
Electrical Overload / Short Circuit | View Details |
| – |
Furnace produces a high-pitched squealing noise during operation.
|
Blower Motor or Belt Noise | View Details |
| – |
Furnace runs but does not produce enough heat; home never reaches set temperature.
|
Low Heat Output / Underfiring | View Details |
| – |
Furnace runs but house air feels cool or lukewarm from vents.
|
Low Supply Air Temperature | View Details |
| – |
Furnace runs but some rooms are much colder than others.
|
Uneven Heating / Airflow Imbalance | View Details |
| – |
Furnace shuts off and on with windy conditions outside.
|
Wind-Induced Venting Issues | View Details |
| – |
Furnace starts and runs for a few minutes, then shuts off and restarts frequently (short cycling).
|
Short Cycling on High Limit | View Details |
| – |
Furnace starts but shuts down when the blower comes on.
|
Flame Disturbance by Airflow | View Details |
| – |
Furnace vibrates excessively and causes rattling in ductwork.
|
Excessive Vibration / Imbalanced Blower Wheel | View Details |
| – |
Furnace will not start at all; thermostat appears to be working; LED shows normal idle code.
|
No Call for Heat from Thermostat | View Details |
| – |
Rust or water stains inside the burner compartment of a high-efficiency Tappan furnace.
|
Condensate Backflow into Heat Exchanger | View Details |
| – |
Strong burning or electrical smell when the furnace runs.
|
Overheating Components / Electrical Fault | View Details |
| – |
Thermostat display is blank and furnace does not run.
|
Loss of 24V Power to Thermostat | View Details |
| – |
Water leaking around the base of a high-efficiency Tappan furnace.
|
Condensate Leak | View Details |
No matching codes found
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