The company Tempstar Heating and Cooling Products offers many models of air-conditioning and heating units based on personal preferences and financial abilities. Having a rich hundred-year tradition of superior quality, this world-class organization has a great team of designers, professional workers and engineers. All its equipment is approved by International Comfort Products (USA). However, there are problems with its units as well. In this case, refer to the troubleshooting table below.
Tempstar DFS4(AH) air conditioners troubleshooting
| PROBLEM | POSSIBLE CAUSE | SOLUTION |
| Unit/System Does Not Work | • The circuit breaker has tripped or a fuse has blown. | • Reset the circuit breaker or replace the fuse with the specified replacement fuse. |
| • Power failure. | • Restart operation when the power is restored. | |
| • Diagnostic lights illuminate. | • Call your service representative. | |
| • Voltage is too low. | ||
| Cooling is Not Working Properly | • The filter is blocked with dust. | • Clean the air filter. |
| • Temperature is not set properly. | • Check the temperature and reset if necessary. | |
| • A window or door is open. | • Close the window or door. | |
| • The outdoor unit is obstructed. | • Remove the obstruction. | |
| • The fan speed is too low. | • Change the fan speed selection. | |
| • The operation mode is in Fan instead of Cool. | • Change the operating mode to Cool or reset the unit. | |
| Heating is Not Working Properly | • The filter is blocked with dust. | • Clean the air filter. |
| • Temperature is set too low. | • Check the temperature and reset if necessary. | |
| • A window or door is open. | • Close the window or door. | |
| • The outdoor unit is obstructed. | • Remove the obstruction. | |
| Unit Stops During Operation | • The Off timer is not operating correctly. | • Restart the operating mode. |
| • Diagnostic lights illuminate. | • Call your service representative. |
Tempstar N4A3 air conditioners troubleshooting
| Status LED | Status LED Description | Status LED Troubleshooting Information |
| Green “POWER” | Module has power | Supply voltage is present at module terminals |
| Red “TRIP” | Thermostat demand signal Y1 is present, but the compressor is not running | 1. Compressor protector is open |
| 2. Outdoor unit power disconnect is open | ||
| 3. Compressor circuit breaker or fuse(s) is open | ||
| 4. Broken wire or connector is not making contact | ||
| 5. Low pressure switch open if present in system | ||
| 6. Compressor contactor has failed open | ||
| Yellow “ALERT” Flash Code 1 | Long Run Time. Compressor is running extremely long run cycles | 1. Low refrigerant charge |
| 2. Evaporator blower is not running | ||
| 3. Evaporator coil is frozen | ||
| 4. Faulty metering device | ||
| 5. Condenser coil is dirty | ||
| 6. Liquid line restriction (filter drier blocked if present in system) | ||
| 7. Thermostat is malfunctioning | ||
| Yellow “ALERT” Flash Code 2 | System Pressure Trip. Discharge or suction pressure out of limits or compressor overloaded | 1. High head pressure |
| 2. Condenser coil poor air circulation (dirty, blocked, damaged) | ||
| 3. Condenser fan is not running | ||
| 4. Return air duct has substantial leakage | ||
| Yellow “ALERT” Flash Code 3 | Short Cycling. Compressor is running only briefly | 1. If high pressure switch open, go to Flash Code 2 information |
| 2. If low pressure switch open, go to Flash Code 1 information | ||
| 3. Thermostat demand signal is intermittent | ||
| 4. Loose wiring at contactor coil | ||
| Yellow “ALERT” Flash Code 4 | Locked Rotor | 1. Run capacitor has failed |
| 2. Low line voltage (contact utility if voltage at disconnect is low) | ||
| 3. Excessive liquid refrigerant in compressor | ||
| 4. Compressor bearings are seized | ||
| Yellow “ALERT” Flash Code 5 | Open Circuit | 1. Outdoor unit power disconnect is open |
| 2. Compressor circuit breaker or fuse(s) is open | ||
| 3. Compressor contactor has failed open | ||
| 4. High pressure switch is open and requires manual reset | ||
| 5. Open circuit in compressor supply wiring or connections | ||
| 6. Unusually long compressor protector reset time due to extreme ambient temperature | ||
| 7. Compressor windings are damaged | ||
| Yellow “ALERT” Flash Code 6 | Open Start Circuit. Current only in run circuit | 1. Run capacitor has failed |
| 2. Open circuit in compressor start wiring or connections | ||
| 3. Compressor start winding is damaged | ||
| Yellow “ALERT” Flash Code 7 | Open Run Circuit. Current only in start circuit | 1. Open circuit in compressor run wiring or connections |
| 2. Compressor run winding is damaged | ||
| Yellow “ALERT” Flash Code 9 | Low Voltage. Control circuit < 17VAC | 1. Control circuit transformer is overloaded |
| 2. Low line voltage (contact utility if voltage at disconnect is low) |