Bryant Furnace Error Codes

Bryant Furnace Error Code Chart

LED CODE

STATUS

CONTINUOUS OFF

Check for 115 VAC at L1 &L2, & 24VAC at SEC-1 & SEC-2

CONTINUOS ON

CONTROL HAS 24VAC POWER.

RAPID FLASHING

LINE VOLTAGE (115VAC) POLARITY REVERSED OR FURNACE NOT GROUNDED

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BRYANT ERROR CODE 11

NO PREVIOUS CODE – STORED STATUS CODES ARE ERASED AUTOMATICALLY AFTER 72 HOURS OR AS SEPCIFIED ABOVE

BRYANT ERROR CODE 12

BLOWER ON AFTER POWER UP (115VAC or 24VAC)

Blower runs for 90 seconds, if unit is powered up during a call for heat (R-w/w1 closed) or (R-w/w1) opens during blower on delay period.

BRYANT ERROR CODE 13

LIMIT CIRCUIT LOCKOUT

Lockout occurs if a limit or flame rollout switch is open longer than 3 minutes or 10 successive limit tips occurred during high-heat.

BRYANT ERROR CODE 14

IGNITION LOCKOUT

Control will auto-reset after 3 hours.

BRYANT ERROR CODE 21

GAS HEATING LOCKOUT

Control will NOT auto reset after 3 hours.

BRYANT ERROR CODE 22

ABNORMAL FLAME-PROVING SIGNAL
Flame is proved while gas valve is de-energized. Inducer will run until fault is cleared.
Check for
Leaky Gas Valve
Stuck open gas valve

BRYANT ERROR CODE 23

PRESSURE SWITCH DID NOT OPEN

Check for: –

Obstructed pressure tubing -Pressure switch stuck closed

BRYANT ERROR CODE 24

SECONDARY BOLTAGE FUSE IS OPEN

Check for: –

Short circuit in secondary voltage(24VAC) wiring.

BRYANT ERROR CODE 31

HIGH-HEAT PRESSURE SWITCH OR HPSR RELAY DID NOT CLOSE OR REOPENED

Indicates the high heat pressure switch input failed to close on a call for high-heat, or opened during high-heat. HPSR relay may be defective. Refer to status code#32

BRYANT ERROR CODE 32

LOW-HEAT PRESSURE SWITCH DID NOT CLOSE OR REOPENED

Indicates the low-heat pressure switch input failed to close on a call fcr low-heat, or opened during low-heat. If opens during 5 minutes alter ignition the next heating cycle will be restricted to high-heat.

Check for

Proper vent sizing
Improper pressure switch wiring – Restricted combustion air supply
Plugged condensate drain – Excessive wind – Low inlet gas pressure (if LGPS used)
Disconnected or obstructed pressure tubing • Water in vent piping. possible sagging pipe
Failed or ‘Out-of-Calibration’ pressure switches

BRYANT ERROR CODE 33

LIMIT CIRCUIT FAULT

Indicates a limit or flame rollout, is open or the furnace is operating in high-heat only mode due to 2 successive low heat limit trips. Blower will run for 4 minutes or until open switch remakes whichever is longer. If open longer than 3 minutes, code changes to lockout #13. If open less than 3 minutes status code #33 continues to flash until blower shuts off.
Flame rollout switch requires manual reset.

Check for:

Improper limit switch or no limit gasket
Defective switch or connections
Improper low or high-heat gas input adjustment – Loose blower wheel
Stuck high-heat solenoid in gas valve

BRYANT ERROR CODE 34

IGNITION PROVING FAULT

– Control will try three more times before lockout 414 occurs. If flame signal lost during blower on-delay period_: blower will come on for the selected blower off-delay. Check for:

Oxide buildup on flame sensor (clean with tune steel wool) Manual valve shut-0g -Control ground continuity
Proper flame sense microamps (.5 microamps D.C. min.. 4.0 – 6.0 nominal) Gas valve defective turned ‘OFF’
Low inlet gas pressure – Inadequate flame carryover or rough ignition – Defective Hol Surface Ignitor
Flame sensor must not be grounded
Green/yellow wire MUST be connected to furnace sheet metal

BRYANT ERROR CODE 43

LOW-HEAT PRESSURE SWITCH OPEN WHILE HIGH-HEAT PRESSURE SWITCH IS CLOSED

Check for:

Plugged condensate drain – low inlet gas pressure (if LGPS used) – Improper pressure switch wiring
Water in vent piping, possibly sagging pipe – Stuck open low-heat pressure switch
Disconnected or obstructed pressure tubing

BRYANT ERROR CODE 45

CONTROL CIRCUITRY LOCKOUT

Auto-reset after 1 hour lockout due to;
Gas valve relay contact stuck open – Flame sense circuit failure Software check error
Reset power to clear lockout. Replace control if status code repeals.