When your Bryant furnace displays error codes, it’s alerting you to possible malfunctions that may impact your home’s comfort. Quickly identifying these Bryant furnace error codes can help you understand the issue, determine urgent repairs, and possibly resolve some problems yourself. This article provides a detailed, up-to-date guide to common error codes, their meanings, and recommended actions, offering valuable insights for American homeowners and HVAC technicians.
| Error Code | Cause | Recommended Action |
|---|---|---|
| 12 | Blower On After Power Up | Wait 90 seconds for system reset |
| 13 | Limit Circuit Lockout | Check filters, air flow, high temperature |
| 33 | Limit Switch Open | Replace filters, check vents & switches |
| 34 | Ignition Proving Failure | Inspect gas supply, flame sensor |
| 41 | Blower Motor Fault | Check blower motor and wiring |
| 43 | Pressure Switch Calibration Fault | Replace/inspect pressure switch |
How To Read Bryant Furnace Error Codes
Bryant furnaces display error codes using a series of LED flashes on their control board. These codes provide vital clues about the furnace’s status and any malfunctions. Homeowners should open the furnace’s lower front panel to observe the LED display. Each code’s pattern represents a specific fault, ranging from ignition failures to sensor issues. Consult the user manual or this guide to interpret the flashes and begin troubleshooting.
Common Bryant Furnace Error Codes And Their Meanings
Error Code 12: Blower On After Power Up
This code signals that the blower motor runs as soon as power is restored. It’s a normal sequence where the system performs a self-check and clears residual fumes. Usually, waiting 90 seconds resolves this code, but if it persists, there may be a control board issue requiring further inspection by a qualified technician.
Error Code 13: Limit Circuit Lockout
A limit circuit lockout means the furnace shut down for safety after the limit switch activated four times within a single heating cycle. Common causes include dirty air filters, blocked vents, or restricted airflow. Change the filter and check for blockage before resetting the furnace. If the code returns, professional servicing may be necessary to prevent potential overheating or fire hazards.
Error Code 33: Limit Switch Open
This error occurs when the high temperature limit switch opens, shutting down the burners to protect the heat exchanger. Factors like clogged filters, closed supply vents, or a malfunctioning blower can trigger it. Clear any obstructions and replace the air filter first. Continued limiting indicates a deeper issue, often with static pressure or the limit switch itself.
Error Code 34: Ignition Proving Failure
This code appears if the furnace can’t verify flame presence after ignition. Potential issues include gas supply problems, a dirty flame sensor, or faulty igniter. Clean or replace the flame sensor and ensure the gas supply is on. Persistent errors require professional assessment of the ignition system and control board.
Error Code 41: Blower Motor Fault
Error 41 signals that the blower motor failed to run when expected. Causes include a stuck blower, electrical problem, or faulty control board. Check motor wiring, the capacitor, and clear any physical obstructions. If you hear unusual noises or the blower remains inactive, expert diagnostic is recommended to avoid further damage.
Error Code 43: Pressure Switch Calibration Fault
This code means the pressure switch failed calibration, which can happen due to clogged condensate lines, faulty switch, or vent blockages. Inspect the pressure switch hose for cracks, clear condensate drains, and ensure flue pipes aren’t obstructed. If the problem isn’t apparent, swapping out the pressure switch may solve it.
Additional Common Error Codes For Bryant Furnaces
| Error Code | Meaning | Possible Solutions |
|---|---|---|
| 14/34 | Ignition Lockout | Reset furnace, check igniter and flame sensor |
| 23 | Pressure Switch Did Not Close | Inspect pressure switch, hose, vent system |
| 31 | Pressure, Draft Safeguard, Or Aux Limit Open | Check venting, pressure switch, heat exchanger |
| 42 | Inducer Motor Fault | Verify inducer motor operation & wiring |
| 44 | Reversed Polarity Or Damaged Board | Check wiring and transformer connections |
| 45 | Control Circuitry Lockout | Cycle power, contact HVAC technician |
Causes And Solutions For Bryant Furnace Error Codes
Airflow And Filtration Issues
Poor airflow is a common culprit behind many error codes such as 13 and 33. Blocked or dirty air filters reduce air movement, causing overheating and shutdowns. Homeowners should replace filters every 1-3 months, ensure supply and return vents are open, and inspect ductwork for blockages. These simple steps can often resolve several recurring codes.
Call 888-896-7031 for Free Local HVAC Quotes – Compare and Save Today!
Ignition System Problems
Ignition failures (codes 34, 14, 34) frequently result from contaminated flame sensors or faulty igniters. Removing the flame sensor and gently cleaning it with steel wool removes oxidation that interrupts the sensor’s operation. Confirming an active gas supply and ensuring igniter wires are secure helps address ignition errors. Seek professional help if there’s a gas leak or the igniter won’t glow.
Pressure Switch Malfunctions
Pressure switches monitor furnace airflow and protect against unsafe operating conditions. Error codes 23, 31, and 43 indicate problems with venting, tubing, or the switch itself. Clear vent pipes, inspect hoses for cracks/leaks, and ensure condensate drains are clear. If calibration fails, replacing the switch is advised. Always turn off power before service.
Electrical And Control Board Issues
Furnaces may display codes like 41, 44, or 45 when control circuits or wiring suffer faults. Damaged wiring, corrosion, power surges, or transformer failure can disrupt the furnace’s communication. Inspect wiring harnesses for damage and ensure correct polarity at the panel. For unfamilar users, consult with a certified HVAC technician to prevent electrical hazards.
Troubleshooting Steps For Bryant Furnace Error Codes
- Turn Off Power: Always shut down the furnace’s power supply before servicing any component.
- Check And Replace Filters: Remove and examine air filters. Dirty filters are a frequent cause of lockouts and can often be replaced by homeowners.
- Inspect Vents And Exhausts: Make sure intake and exhaust pipes are not obstructed by debris, snow, or ice.
- Examine Flame Sensor: Disconnect and clean the flame sensor using a fine abrasive pad if flames are not sensed.
- Assess Blower And Inducer Motors: Listen for unusual noises or lack of operation; check for wiring or capacitor failure.
- Test Pressure Switch: Inspect for loose hoses, water buildup, or switch malfunction. Replace if necessary.
- Clear Condensate Drain. Condensation backup can affect pressure switches and induce safety shutdowns.
- Reset The Furnace: Switch furnace power off at the breaker for one minute, then restore it. This may clear lockout errors.
When To Call A Professional HVAC Technician
Some Bryant furnace error codes, especially those related to electrical or gas components, require specialized tools and knowledge. If basic troubleshooting fails, or if error codes such as 13, 41, or 45 keep recurring, it’s best to schedule service with a qualified HVAC technician. Issues involving the heat exchanger, gas valves, or control board should not be handled without professional training due to safety risks.
Preventive Maintenance Tips For Bryant Furnaces
- Replace Air Filters: Schedule monthly checks and change filters every 1-3 months.
- Annual Professional Inspection: Have a certified technician check heat exchangers, burners, and control boards yearly.
- Monitor Vents: Regularly inspect intake and exhaust pipes for blockage.
- Test Carbon Monoxide Detectors: Place detectors near furnaces and test monthly for safety.
- Seal Duct Leaks: Use mastic or metal tape on ducts to boost system performance and reduce strain.
- Keep Surroundings Clear: Maintain a 3-foot clear zone around the furnace for ventilation and safety.
Frequently Asked Questions About Bryant Furnace Error Codes
Why Is My Bryant Furnace Blinking Red?
A red blinking light signals a fault code. Count the flashes and refer to this guide or your manual to reveal the cause. Two-digit codes are displayed as two sets of flashes separated by a pause (e.g., flash-flash-pause-flash-flash-flash for code 23).
Can I Reset The Error Codes Without A Technician?
Some codes resolve by cycling furnace power at the main switch or breaker. Persistent errors suggest an ongoing problem requiring repair, not just a reset.
How Often Should I Replace The Air Filter?
Most Bryant furnaces work best with a clean filter every 1-3 months, but homes with pets or heavy usage need more frequent changes.
Is It Safe To Ignore An Error Code If My Furnace Still Runs?
No, ignoring warning codes can lead to breakdowns, higher energy bills, or even dangerous situations. Always address error codes promptly to protect your furnace and family.
Will A Nest Or Smart Thermostat Cause Error Codes?
Improper thermostat wiring or incompatibility can contribute to control board faults. Double-check connections and compatibility when installing new thermostats on Bryant furnaces.
Call 888-896-7031 for Free Local HVAC Quotes – Compare and Save Today!
Finding Bryant Furnace Manuals And Additional Resources
The most detailed error code explanations are located in the Bryant furnace installation or service manual. Manuals can be downloaded from the Bryant documentation library. Manufacturer support lines and certified dealers offer additional guidance for advanced diagnostics.
Summary Table Of Common Bryant Furnace Error Codes
| Error Code | Possible Cause | Solution |
|---|---|---|
| 12 | Blower on after power up | Wait or reset system |
| 13/33 | Limit switch issues, poor airflow | Replace filter, check airflow, inspect switch |
| 34/14 | Ignition failure | Inspect igniter & flame sensor, check gas supply |
| 23/31 | Pressure switch, vent, or airflow problem | Verify venting & pressure switch operation |
| 41/42 | Blower or inducer motor issue | Check motors, wiring, and control boards |
| 43 | Pressure switch calibration | Replace switch, clear blockages |
| 44/45 | Control or wiring fault | Inspect wiring, board; call technician |
Quick-Reference Bryant Error Code Lookup Table
| Error Code | Meaning | DIY Solution |
|---|---|---|
| 12 | Blower On After Power Up | Normal; wait 90 seconds |
| 13, 33, 44 | High Limit, Lockout, Polarity | Replace filter, check airflow, inspect wiring |
| 23, 31, 43 | Pressure Switch/Calibration | Clear vent/hoses, test/replace switch |
| 34, 14 | Ignition Error | Clean/replace igniter, check gas |
| 41, 42, 45 | Blower/Inducer Or Control Board | Inspect motors, wiring, reset system |
Knowing how to read and troubleshoot Bryant furnace error codes empowers homeowners to maintain a safe, efficient heating system, ensuring comfort and peace of mind during the winter months.