Bryant Furnace Error Codes

Bryant 367AAN Furnace Error Codes

LED CODE Solution
11 NO FAULT IN RECENT HISTORY DISPLAY- Indicates no faults have occurred within the last five cycles. To read recent fault history, put setup switch “SW-1” in the “ON” position. To clear recent fault history, put setup switch “SW-1” in the “ON” position and jumper thermostat terminals “R”, “W/Wl” and “Y/Y2” simultaneously until an “11” is flashed.
12 BLOWER CALIBRATION LOCKOUT- Indicates RPM calculated for low heat was less than 250 RPM or greater than 1300 RPM on two successive attempts. Auto reset after three hours. Reset power
13 LIMIT SWITCH LOCKOUT- Indicates the occurrence of 10 successive limit trips during high heat or three successive limit trips during low heat. Auto reset after three hours. Check for ^Improper or misaligned limit and/or limit shield. ^Improper high or low heat qas input adjustment. *Stuck high heat solenoid in gas valve.
14 IGNITION LOCKOUT- Control will auto-reset after three hours.
21 INVALID MODEL SELECTION- Indicates model plug is missing or incorrect.
22 SETUP ERROR- Indicates setup switch “SW-1” or “SW-6” is positioned improperly. The following combinations will cause the fault:
^Thermostat call with “SW-1” “ON”, or Thermostat call with “SW-6” “ON”, or “SW-1” and “SW-6” both “ON” together.
23 INVALID BLOWER AIRFLOW SELECTION- Indicates improper “A/C” or “CF” switch setting. The 042 and 14 units can deliver 1-1/2 to 3-1/2 tons A/C and 600 to 1400 CFM for continuous fan. The 060 and 20 unit can deliver 2 to 5 tons A/C and 800 to 2000 CFM for continuous fan. If code is flashing, unit will default tp closest allowable airflow.
24 SECONDARY VOLTAGE FUSE IS OPEN Check for: – Short circuit in secondary voltage (24VAC) wiring.
PRESSURE SWITCH DID NOT CLOSE OR REOPENED – If open longer than five minutes, inducer shuts off for 15 minutes before retry. Check for: – Excessive wind
31 – Proper vent sizing – Defective inducer motor – Low inducer voltage (115VAC) – Defective pressure switch – Inadequate combustion air supply – Restricted vent
– Disconnected or obstructed pressure tubing – Low inlet gas pressure (if LGPS used) If it opens during blower on- delay period, blower will come on for the selected blower off-delay
33 LIMIT CIRCUIT FAULT – Indicates a limit, or flame rollout is open. 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 of Flame rollout switch requires manual reset. Check for: – Restricted vent – Proper vent sizing – Loose blower wheel – Excessive wind – Dirty filter or restricted duct system.
– Defective blower motor or capacitor. – Defective switch or connections. – Inadequate combustion air supply (Flame Roll-out Switch open).
34 IGNITION PROVING FAILURE – Control will try three more times before lockout #14 occurs. If flame signal lost during blower on-delay period, blower will come on for the selected blower off-delay. Check for: – Control ground continuity – Flame sensor must not be grounded – Oxide buildup on flame sensor (clean with fine steel wool)
– Proper flame sense microamps (.5 microamps D.C. min., 4.0 – 6.0 nominal). – Gas valve defective or gas valve turned off – Manual valve shut-off – Defective Hot Surface Ignitor – Low inlet gas pressure
– Inadequate flame carryover or rough ignition – Green/Yellow wire MUST be connected to furnace sheet metal
41 BLOWER OUTSIDE VALID SPEED RANGE- Indicates the blower is not operating at the calculated RPM. If this fault occurs in conjunction with fault #44 check wiring to motor otherwise

Bryant 340MAV Furnace Error Codes

13 or 33 Limit Switch Lockout – Check for dirty air filter.
– Check for blocked return-air or supply-air grilles.
14 or 34 Ignition Lockout or Ignition Proving Fault – Check to be sure manual shutoff valve in gas supply pipe is in the open position. (Follow start-up procedure if you open gas line.)
– Check to be sure control switch or knob on gas valve is in ON position. (Follow start-up pro- cedures if you must reset switch or knob to ON position.)
– Check for disconnected ground wire.
24 Furnace Fuse Open – Check for blown fuse and possible short in 24-v wiring.
31 Pressure Switch Not Closed – Check to make sure that all PVC pipes leading into the combustion-air intake and vent/ exhaust are free from any cracks and sags. Also check the combustion-air intake and vent/ exhaust pipes on the outside of your home for blockage.
12, 21,22, or 23 Any Other Fault Code – Call dealer for service.
No Fault Code Signaled Furnace Fails to Operate and No Fault is Signaled – Check thermostat for proper temperature setting.
– Check for blown fuses and circuit breakers.
– Check to be sure blower access panel is properly in place.

Bryant 355M-40-4 Furnace Error Codes

RED LED1 ON Furnace is operating in emergency heat.
RED LED2 ON The microprocessor has malfunctioned. To reset: Put setup switch “SW-1” in the “ON” position nad jumper thermostat terminals “R”, “W/Wl” and “Y/Y2” simultaneously with the door switch pushed in and power to the unit “ON”. Disconnect jumper and place setup switch in the “OFF” position. If LED2 reappears, replace main control board.
YELLOW LED3 ON Furnace is operating in high heat.
GREEN LED4 ON Furnace is operating in low heat.
RED LED2 FLASHING Line voltage polarity is reversed.