York
York Air Conditioners Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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d1
York ductless AC displays d1 and runs with poor temperature control.
Room Temperature Sensor Fault
d2
York ductless AC shows d2 and may short cycle or not defrost properly.
Outdoor Coil Temperature Sensor Fault
E1
York ducted or packaged AC shuts down and displays E1 on the wall thermostat or indoor unit display.
High-Pressure Switch Lockout
E2
York split or packaged AC shows E2 and stops cooling intermittently.
Low-Pressure Switch Trip
E3
York air conditioner displays E3 and shuts down shortly after starting.
Discharge Temperature High / Compressor Overheat
E4
York inverter or digital AC shows E4 and stops cooling or heating.
Indoor Coil Temperature Sensor Fault / Freeze Protection
E5
York split AC shows E5 and outdoor unit does not start.
Communication Error Between Indoor and Outdoor PCB
E6
York inverter AC shows E6 and compressor does not run or runs briefly then stops.
Compressor or Outdoor Motor Overload / Current Protection
E7
York multi-split system shows E7 and one or more indoor units stop cooling.
Indoor Unit Address / Mode Conflict
E8
York room AC or ductless unit shows E8 and shuts down during operation.
Indoor Fan Motor Fault / Overload
E9
York ductless AC shows E9 and stops cooling, often with water dripping from the indoor unit.
Full Drain Pan / Drainage Fault
F1
York air handler or furnace control board flashes F1 and blower runs erratically.
Indoor Blower Motor Fault
F2
York air handler board flashes F2, and the system will not start cooling.
Low Voltage / Thermostat Signal Fault
F3
York furnace/air handler board flashes F3, and the outdoor unit does not run.
Outdoor Unit Demand / Y Circuit Fault
F4
York furnace/air handler board flashes F4, and the system cycles off on safety.
High Temperature / Limit Switch Fault (Cooling Mode Airflow Issue)
H1
York heat pump in heating mode shows H1 and stops heating.
Defrost Sensor or Defrost Cycle Fault
H2
York heat pump shows H2 and runs electric heat more often than normal.
Outdoor Ambient Temperature Sensor Fault
L1
York communicating thermostat shows L1 lockout, and cooling is disabled.
Compressor Lockout After Multiple Trips
L2
York communicating thermostat shows L2, and the outdoor unit does not respond.
Loss of Communication with Outdoor Unit
P1
York portable or room air conditioner shows P1 and stops cooling.
Full Condensate Tank / Water Level Protection
P2
York portable AC displays P2 and shuts off the compressor.
Low Temperature / Frost Protection
Symptom
The York air conditioner emits musty or moldy odors when starting.
Biological Growth on Evaporator Coil and Drain Pan
Symptom
The York air conditioner runs but does not cool well; supply air is only slightly cooler than the room.
Low Capacity / Undercharge or Airflow Problem
Symptom
The York air conditioner short cycles; it turns on and off frequently without reaching the set temperature.
Short Cycling / Control or Capacity Mismatch
Symptom
The York air conditioner's indoor blower runs, but the outdoor unit will not start; no fan or compressor noise outside.
Outdoor Contactor or Control Circuit Failure
Symptom
The York indoor unit produces a loud whistling or roaring noise from the vents.
Excessive Air Velocity / Duct Static Pressure Problem
Symptom
The York outdoor fan runs, but the compressor does not start; loud humming then clicks off.
Compressor Start Failure / Start Capacitor Fault
Symptom
The York outdoor unit makes loud buzzing, rattling, or grinding noises during operation.
Outdoor Mechanical Noise / Fan or Compressor Issue
Symptom
York AC runs continuously and will not shut off, even when the setpoint is reached.
Stuck Relay or Thermostat Control Fault
Symptom
York AC trips the breaker immediately or shortly after starting.
Overcurrent / Short Circuit
Symptom
York AC will not start at all; the thermostat display is blank or unresponsive.
No Power to Control Circuit
Symptom
York air conditioner produces a burning or electrical smell when running.
Overheating Electrical Component or Dust Burn-Off
Symptom
York ductless indoor unit louvers do not move or are stuck in one position.
Louver Motor or Linkage Failure
Symptom
York ductless or room AC remote control does not operate the unit.
Remote Control / IR Receiver Fault
Symptom
York heat pump in heating mode blows cold air or does not heat adequately.
Heat Pump Heating Performance Issue
Symptom
York indoor unit leaking water from the front or ceiling; water stains around the air handler.
Condensate Drain Blockage / Pan Overflow
Symptom
York outdoor unit runs, but the indoor blower does not run; weak or no airflow from vents.
Indoor Blower Motor or Capacitor Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| d1 |
York ductless AC displays d1 and runs with poor temperature control.
|
Room Temperature Sensor Fault | View Details |
| d2 |
York ductless AC shows d2 and may short cycle or not defrost properly.
|
Outdoor Coil Temperature Sensor Fault | View Details |
| E1 |
York ducted or packaged AC shuts down and displays E1 on the wall thermostat or indoor unit display.
|
High-Pressure Switch Lockout | View Details |
| E2 |
York split or packaged AC shows E2 and stops cooling intermittently.
|
Low-Pressure Switch Trip | View Details |
| E3 |
York air conditioner displays E3 and shuts down shortly after starting.
|
Discharge Temperature High / Compressor Overheat | View Details |
| E4 |
York inverter or digital AC shows E4 and stops cooling or heating.
|
Indoor Coil Temperature Sensor Fault / Freeze Protection | View Details |
| E5 |
York split AC shows E5 and outdoor unit does not start.
|
Communication Error Between Indoor and Outdoor PCB | View Details |
| E6 |
York inverter AC shows E6 and compressor does not run or runs briefly then stops.
|
Compressor or Outdoor Motor Overload / Current Protection | View Details |
| E7 |
York multi-split system shows E7 and one or more indoor units stop cooling.
|
Indoor Unit Address / Mode Conflict | View Details |
| E8 |
York room AC or ductless unit shows E8 and shuts down during operation.
|
Indoor Fan Motor Fault / Overload | View Details |
| E9 |
York ductless AC shows E9 and stops cooling, often with water dripping from the indoor unit.
|
Full Drain Pan / Drainage Fault | View Details |
| F1 |
York air handler or furnace control board flashes F1 and blower runs erratically.
|
Indoor Blower Motor Fault | View Details |
| F2 |
York air handler board flashes F2, and the system will not start cooling.
|
Low Voltage / Thermostat Signal Fault | View Details |
| F3 |
York furnace/air handler board flashes F3, and the outdoor unit does not run.
|
Outdoor Unit Demand / Y Circuit Fault | View Details |
| F4 |
York furnace/air handler board flashes F4, and the system cycles off on safety.
|
High Temperature / Limit Switch Fault (Cooling Mode Airflow Issue) | View Details |
| H1 |
York heat pump in heating mode shows H1 and stops heating.
|
Defrost Sensor or Defrost Cycle Fault | View Details |
| H2 |
York heat pump shows H2 and runs electric heat more often than normal.
|
Outdoor Ambient Temperature Sensor Fault | View Details |
| L1 |
York communicating thermostat shows L1 lockout, and cooling is disabled.
|
Compressor Lockout After Multiple Trips | View Details |
| L2 |
York communicating thermostat shows L2, and the outdoor unit does not respond.
|
Loss of Communication with Outdoor Unit | View Details |
| P1 |
York portable or room air conditioner shows P1 and stops cooling.
|
Full Condensate Tank / Water Level Protection | View Details |
| P2 |
York portable AC displays P2 and shuts off the compressor.
|
Low Temperature / Frost Protection | View Details |
| – |
The York air conditioner emits musty or moldy odors when starting.
|
Biological Growth on Evaporator Coil and Drain Pan | View Details |
| – |
The York air conditioner runs but does not cool well; supply air is only slightly cooler than the room.
|
Low Capacity / Undercharge or Airflow Problem | View Details |
| – |
The York air conditioner short cycles; it turns on and off frequently without reaching the set temperature.
|
Short Cycling / Control or Capacity Mismatch | View Details |
| – |
The York air conditioner's indoor blower runs, but the outdoor unit will not start; no fan or compressor noise outside.
|
Outdoor Contactor or Control Circuit Failure | View Details |
| – |
The York indoor unit produces a loud whistling or roaring noise from the vents.
|
Excessive Air Velocity / Duct Static Pressure Problem | View Details |
| – |
The York outdoor fan runs, but the compressor does not start; loud humming then clicks off.
|
Compressor Start Failure / Start Capacitor Fault | View Details |
| – |
The York outdoor unit makes loud buzzing, rattling, or grinding noises during operation.
|
Outdoor Mechanical Noise / Fan or Compressor Issue | View Details |
| – |
York AC runs continuously and will not shut off, even when the setpoint is reached.
|
Stuck Relay or Thermostat Control Fault | View Details |
| – |
York AC trips the breaker immediately or shortly after starting.
|
Overcurrent / Short Circuit | View Details |
| – |
York AC will not start at all; the thermostat display is blank or unresponsive.
|
No Power to Control Circuit | View Details |
| – |
York air conditioner produces a burning or electrical smell when running.
|
Overheating Electrical Component or Dust Burn-Off | View Details |
| – |
York ductless indoor unit louvers do not move or are stuck in one position.
|
Louver Motor or Linkage Failure | View Details |
| – |
York ductless or room AC remote control does not operate the unit.
|
Remote Control / IR Receiver Fault | View Details |
| – |
York heat pump in heating mode blows cold air or does not heat adequately.
|
Heat Pump Heating Performance Issue | View Details |
| – |
York indoor unit leaking water from the front or ceiling; water stains around the air handler.
|
Condensate Drain Blockage / Pan Overflow | View Details |
| – |
York outdoor unit runs, but the indoor blower does not run; weak or no airflow from vents.
|
Indoor Blower Motor or Capacitor Failure | View Details |
No matching codes found
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