Carrier Furnace: Burners will not light or stay lit – Carrier 58SB0A/58SB1A
Burners will not light or stay lit - Carrier 58SB0A/58SB1A on a Carrier furnace: Ignition-proving problems (codes 34 and 14) worked through with the component test.
Applies to: Carrier 58SB0A, 58SB1A
Common causes of burners will not light or stay lit - carrier 58sb0a/58sb1a
- Gas valve or manual shutoff off
- Igniter or harness open
- No 24 V to gas valve or valve stuck
- Low inlet pressure or poor carryover
- Dirty, grounded or weak flame sensor
- Control fault
How to fix burners will not light or stay lit - carrier 58sb0a/58sb1a: step by step
- Check the gas valve switch and the manual shutoff, the green/yellow ground to sheet metal, and that the flame sensor is not touching ground.
- Remove the R lead and run the component test; the igniter should glow orange/white by the end of its 15 s warm-up.
- No glow: unplug the igniter harness and check for 115 V from pin 1 to neutral during the test; voltage present means replace the igniter or harness, none means replace the control.
- Put R back and call for heat; the gas valve should get 24 V. No 24 V: check wiring, then the control.
- 24 V but no gas flow: replace the valve. Gas flows but no ignition: check inlet pressure, firing rate, burner carryover gap (about .045 in.).
- Burners light then drop: measure flame current; typical is 4.0-6.0 microamps. Under 0.5 microamps: clean the sensor with fine steel wool or replace it.
- If current is normal and burners still drop out, replace the control.
If the unit shows an error code, look it up: Carrier Furnace codes
Models
58SB0A/58SB1A
58SB0A045E14--1258SB0A045E17--1258SB0A070E14--1258SB0A070E17--1258SB0A070E17--1658SB0A070E21--1658SB0A090E17--1458SB0A090E21--1658SB0A090E21--2058SB0A090E24--2058SB0A110E21--2058SB0A110E24--2058SB0A135E24--2058SB0A155E24--20
59MN7C
59MN7C060C17--1459MN7C060C21--2059MN7C080C17--1459MN7C080C21--2059MN7C100C21--2259MN7C120C24--22
59SC6A
59SC6A026M14--1059SC6A040M14--1059SC6A040M17--1259SC6A060M14--1259SC6A060M17--1659SC6A080M17--1659SC6A080M21--2059SC6A100M21--2059SC6A100M21--2259SC6A120M24--2259SC6A140M24--22
59TP6A
59TP6A040-1059TP6A040-1259TP6A060-1259TP6A060-1459TP6A080-1659TP6A080-2059TP6A100-2059TP6A120-22
Payne PG96VTA
PG96VTA30040APG96VTA36040BPG96VTA36060APG96VTA48060BPG96VTA48080BPG96VTA60080CPG96VTA60100CPG96VTA66120D
Source: Carrier 58SB0A-05SI installation manual (text export), Fig. 51 Troubleshooting Guide (code 34 branch). Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.