For over a century, the Coleman name has been a trusted icon in America. Known for rugged dependability and tremendous value, their products stand the test of time. This heritage of quality and durability is crafted into every Coleman HVAC system that is built according to strict tolerances and rigorous testing. Coleman HVAC is proud to continue our enduring legacy by providing long lasting comfort you can count on.

Air Conditioner Error Codes

CODE: E0. 
PROBLEM: Indoor EEPROM (Electrically Erasable Programmable Read-Only Memory) error. 

CODE: E1. 
PROBLEM: Indoor and outdoor unit communication malfunction. 

CODE: E3. 
PROBLEM: Indoor fan speed malfunction. 

CODE: E4. 
PROBLEM: Indoor room temperature sensor error. 

CODE: E5. 
PROBLEM: Evaporator coil temperature sensor error. 

CODE: EC. 
PROBLEM: Refrigerant leak detection system malfunction. 

CODE: EE. 
PROBLEM: Water level alarm malfunction. 

CODE: E8. 
PROBLEM: Dual indoor unit (twin model only) communication malfunction. 

CODE: E9. 
PROBLEM: Other twin model malfunction. 

CODE: F0. 
PROBLEM: Overload protection. 

CODE: F1. 
PROBLEM: Outdoor temperature sensor error. 

CODE: F2. 
PROBLEM: Outdoor condenser pipe sensor error. 

CODE: F3. 
PROBLEM: Discharge air temperature sensor error. 

CODE: F4. 
PROBLEM: Outdoor EEPROM (Electrically Erasable Programmable Read-Only Memory) error. 

CODE: F5. 
PROBLEM: Outdoor fan speed (DC fan motor only) malfunction. 

CODE: F6. 
PROBLEM: T2b sensor error. 

CODE: F7. 
PROBLEM: Auto-lifting panel communication error. 

CODE: F8. 
PROBLEM: Auto-lifting panel malfunction. 

CODE: F9. 
PROBLEM: Auto-lifting panel is open. 

CODE: P0. 
PROBLEM: Inverter module IPM protection. 

CODE: P1. 
PROBLEM: High/Low voltage protection. 

CODE: P2. 
PROBLEM: Compressor top overheating protection. 

CODE: P3. 
PROBLEM: Outdoor low temperature protection. 

CODE: P4. 
PROBLEM: Compressor drive error. 

CODE: P5. 
PROBLEM: Mode conflict. 

CODE: P6. 
PROBLEM: Compressor low-pressure protection. 

CODE: P7. 
PROBLEM: Outdoor IGBT sensor error.

Furnace Error Codes

CODE: Slow green flashing  
PROBLEM: Coleman furnace is operating normally.  

CODE: Slow amber flashing  
PROBLEM: Normal operation with a call for heat.  

CODE: Steady on red  
PROBLEM: There's a control failure. 
 
CODE: Rapid red flashing  
PROBLEM: There's a twinning error with incorrect 24V phasing.  
FIX: Check the twinning wiring. 

CODE: Rapid amber flashing  
PROBLEM: There's a low flame sense current.  
FIX: Check and clean the flame sensor. If it's still an issue, check for proper gas flow. 

CODE: One red flash  
PROBLEM: A flame's present with the gas turned off.  
FIX: Check the gas valve. It could be leaky or slow closing. 

CODE: Two red flashes  
PROBLEM: Pressure switch is stuck in the closed position.  
FIX: Check if there is a faulty pressure switch or miswiring. 

CODE: Three red flashes  
PROBLEM: Pressure switch is stuck in the open position.  
FIX: Check if there is a faulty inducer, a blocked vent pipe, a broken pressure switch hose, or a faulty pressure switch. 

CODE: Four red flashes  
PROBLEM: Limit switch is stuck while open.  
FIX: Check for a a dirty filter, an improperly sized duct system, an incorrect blower speed setting, or a faulty blower motor. 

CODE: Five red flashes  
PROBLEM: Rollout switch is stuck while open.  
FIX: The rollout control is manually reset. Therefore, if it has opened, then check to see if the inducer is operating properly or there is an issue with the primary heat exchanger. 

CODE: Six red flashes  
PROBLEM: Pressure switch cycle has locked out.  
FIX: The furnace will lockout for one hour and then reset. 

CODE: Seven red flashes  
PROBLEM: There's an ignition lockout due to too many retries.  
FIX: The flame couldn't be established, check for a faulty gas valve, a dirty or defective flame sensor, a faulty hot surface ignitor, or a problem with the burner. 

CODE: Eight red flashes  
PROBLEM: There's an ignition lockout due to repeated power recycles.  
FIX: Check if there is low gas pressure, a dirty or defective flame sensor, or a faulty gas valve. 

CODE: Nine red flashes  
PROBLEM: There's a grounding or line polarity issue.  
FIX: Check the polarity at both the furnace and branch. 

CODE: Ten red flashes  
PROBLEM: Gas continues to flow with no call for heating.  
FIX: Check on the gas valve and the gas valve wiring.

Heat Pump Error Codes

While I can provide you with some general error codes that are commonly used in heat pumps, it's important to note that the specific error codes for Coleman heat pumps may vary. Here are some general error codes you might encounter:

E1: This code typically indicates a problem with the air filter. Check and clean or replace the air filter as necessary.

E2: This error code may indicate an issue with the outdoor temperature sensor. It could be a faulty sensor or a wiring problem. Professional assistance might be required to diagnose and resolve the issue.

E3: This code often signifies a problem with the indoor coil temperature sensor. It could indicate a faulty sensor or a wiring issue. Professional assistance is recommended.

E4: This error code generally indicates a refrigerant issue. It could mean that the system is low on refrigerant or that there is a refrigerant leak. Professional HVAC service is necessary to address this issue.

E5: This code typically indicates a problem with the outdoor fan motor or its control circuit. It could be due to a faulty motor, a wiring issue, or a control board problem. Professional inspection and repair are needed.

E6: This error code commonly points to a problem with the communication between the indoor and outdoor units. It could be a wiring issue or a faulty control board. Professional assistance is recommended to resolve this error.

Remember, these are general error codes and may not apply to your specific Coleman heat pump model. It's always best to consult the manufacturer's documentation or contact their customer support for the accurate error codes related to your unit.