Furnace flashing an error code?
It is ‘always’ best practice to have a licensed technician complete a thorough assessment, however it is good to know what you are looking at for the reason you have “no heat”.
Carrier Furnace Error Codes
Each status code is a two-digit number. The first number is determined by the number of short flashes and the second digit by the number of long flashes.
| Carrier Error Code | What this means | Action required |
|---|---|---|
| Rapid LED flashing | Line voltage polarity is reversed. | If twinned, refer to twinning kit instructions. |
| Error Code 1-1 | No previous code | Stored status codes are erased when power to control is interrupted. |
| Error Code 1-2 | The blower is on after power up | Blower runs for 90 seconds if the unit is powered up during a call for heat. |
| Error Code 1-3 | Limit or flame roll-out switch lockout | Control will auto-reset after 3 hours. Reset the switch or replace fuse link. |
| Error Code 1-4 | Ignition lockout | Control will auto-reset after 3 hours. |
| Error Code 2-1 | Gas heating lockout | Control won’t auto-reset. Check for either a badly-wired gas valve or a defective control. |
| Error Code 2-2 | Abnormal flame-proving signal | Flame is proved while the gas valve is de-energized. Check for either a leaky or stuck-open gas valve. |
| Error Code 2-3 | Pressure switch didn’t open | Check for an obstruction in the pressure tubing or a pressure switch that is stuck closed. |
| Error Code 2-4 | Secondary voltage fuse is open | Check for a short circuit in the secondary voltage wiring. |
| Error Code 3-1 | Pressure, draft safeguard, aux-limit switch, or blocked vent switch didn’t close (or reopened, downflow only) | If open for longer than 5 minutes, the inducer will shut off for 15 minutes before retry. Check for: low inducer voltage; proper vent sizing; defective inducer motor; defective blower motor or capacitor; defective pressure switch; restricted vent; excessive wind, inadequate combustion air supply; or obstructed pressure tubing. |
| Error Code 3-3 | Limit or flame roll-out switch is open | If the switch is open for longer than 3 minutes, the code will change to #1-3. Flame roll-out switch requires manual reset. Check for: defective blower motor or capacitor; dirty filter or restricted duct system; loose blower wheel; faulty switch or connections; or inadequate combustion air supply. |
| Error Code 3-4 | Ignition proving failure | Control will try three more times before lockout #1-4 will occur. If the flame signal is lost after the trial for ignition period, the blower will come on for a 90 second recycle delay. Check for: build-up on the flame sensor; proper microamp distribution to the flame sensor; defective gas valve or turned off gas valve; faulty hot surface ignitor; low inlet gas pressure; the manual valve is shut-off; continuity of control ground; low flame carryover or rough ignition; ungrounded flame sensor. |
Tasks to Leave to a Furnace Repair Expert
When troubleshooting your furnace doesn’t solve your heating issues, never hesitate to contact a trained HVAC contractor. Any furnace, regardless of its age, may pose combustion- or gas-related safety hazards, so it’s always a good idea to have an expert examine the unit and suggest the best course of action.
Carrier Furnace Model Numbers
59MN7
59SP5
59TN6
- 59MN7A060V17–14
- 59MN7A060V21–20
- 59MN7A080V17–14
- 59MN7A080V21–20
- 59MN7A100V21–22
- 59MN7A120V24–22
- 59SP5A040E14–10
- 59SP5A040E17–12
- 59SP5A060E14–12
- 59SP5A060E17–14
- 59SP5A080E17–16
- 59SP5A080E21–20
- 59SP5A100E21–20
- 59SP5A120E24–22
- 59TN6A060V17–14
- 59TN6A080V17–14
- 59TN6A080V21–20
- 59TN6A100V21–22
- 59TN6A120V24–22
59SC5
59TP5
59SC2
- 59SC5A040S14–10
- 59SC5A060S14–10
- 59SC5A060S17–14
- 59SC5A080S17–16
- 59SC5A080S21–20
- 59SC5A100S21–14
- 59SC5A100S21–20
- 59SC5A120S24–20
- 59SC5A140S24–20
- 59TP5A040E14–10
- 59TP5A040E17–12
- 59TP5A060E14–12
- 59TP5A060E17–14
- 59TP5A080E17–16
- 59TP5A080E21–20
- 59TP5A100E21–20
- 59TP5A120E24–22
- 59SC2B040S14–10
- 59SC2B040S17–12
- 59SC2B060S14–12
- 59SC2B060S17–16
- 59SC2B080S17–16
- 59SC2B080S21–20
- 59SC2B100S21–16
- 59SC2B100S21–22
- 59SC2B120S24–22
Discontinued Carrier Furnace Models
Performance 95
Infinity ICS
Performance 93
- 58HDV040-12
- 58HDV060-12
- 58HDV080-20
- 58HDV100-20
- 58MVC060-14
- 58MVC080-14
- 58MVC080-20
- 58MVC100-20
- 58MVC120-20
- 58MTB060–12
- 58MTB080–12
- 58MTB080–16
- 58MTB100–16
- 58MTB100–20
- 58MTB120–20
58MVP
Performance 90
WeatherMaker 9200
- 58MVP040-14
- 58MVP040-14-L
- 58MVP060-14
- 58MVP060-14-L
- 58MVP080-14
- 58MVP080-14-L
- 58MVP080-20
- 58MVP080-20-L
- 58MVP100-20
- 58MVP100-20-L
- 58MVP120-20
- 58MVP120-20-L
- 59TP6A040E141110
- 59TP6A040E171112
- 59TP6A060E141112
- 59TP6A060E171114
- 59TP6A080E171116
- 59TP6A080E211120
- 59TP6A100E211120
- 59TP6A120E241122
- 58MXA040-08
- 58MXA040-12
- 58MXA060-08
- 58MXA060-12
- 58MXA060-16
- 58MXA080-12
- 58MXA080-16
- 58MXA080-20
- 58MXA100-16
- 58MXA100-20
- 58MXA120-20
- 58MXA140-20
WeatherMaker 9300TS
58MCA
58MTA060-12
58MTA080-12
58MTA080-16
58MTA100-16
58MTA100-20
58MTA120-20
58MCA040-08
58MCA040-12
58MCA060-08
58MCA060-12
58MCA060-16
58MCA080-12
58MCA080-16
58MCA080-20
58MCA100-16
58MCA100-20
58MCA120-20
58MCA140-20
