Bryant Furnace Error Codes

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.

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

Control will auto-reset after 3 hours.

Control will NOT auto reset after 3 hours.

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

Check for: –

Obstructed pressure tubing -Pressure switch stuck closed

Check for: –

• Short circuit in secondary voltage(24VAC) wiring.

Eiher indicates the model plug (PL4) is missing or incorrect or setup switch “SW1-1” or “SW1=6” is positioned improperly. If code flashes only 4 times on power-up control is defaulting to model selection stored in memory.
Check the following:

• Thermostat call with “SW-1” ON
• Thermostat call with “SW-6” ON
• “SW1-1” and “SW1-6” both ON together
• Two different furnace models twinned
• Wiring diagram for model plug number and resistance values if code flashes continuously

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

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

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

– 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

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

• 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.