When a Rheem furnace displays Error Code 59, it often signals a critical issue affecting the furnace’s normal operation. This error is specifically related to the furnace’s burner ignition process, typically indicating a problem with the ignitor or flame detection system. Understanding this error code, its causes, and troubleshooting steps is essential for homeowners aiming to restore heating efficiency promptly and safely.
| Error Code | Description | Common Causes | Recommended Actions |
|---|---|---|---|
| 59 | Ignitor Failure or Ignition Lockout | Faulty ignitor, flame sensor issues, dirty components, gas supply problems | Inspect ignitor and flame sensor, clean or replace parts, verify gas supply |
What Does Rheem Furnace Error Code 59 Mean?
Error Code 59 on Rheem furnaces typically indicates an ignition failure. During a standard startup, the ignitor should light the burner, and the flame sensor confirms combustion. If the furnace cannot ignite or detect a proper flame within a specific time frame, it will trigger this error code to prevent unsafe operation.
This safety feature protects the furnace from potential gas buildup and damage, ensuring the system shuts down until the issue is resolved.
Common Causes of Error Code 59
Several issues can trigger this error, primarily linked to ignition and flame detection components:
- Faulty Ignitor: The ignitor may be cracked or burned out, preventing the burner from lighting.
- Dirty or Malfunctioning Flame Sensor: The flame sensor might be coated with residue, preventing it from detecting the flame.
- Gas Supply Issues: Insufficient or interrupted gas flow can stop ignition despite a functioning ignitor.
- Electrical Problems: Loose wiring or faulty control boards can disrupt ignition cycles.
- Restricted Airflow or Dirty Burners: These issues can impair the combustion process, causing ignition failure.
How to Troubleshoot Rheem Furnace Error Code 59
Safety First: Power and Gas Supply
Always turn off the furnace and shut off the gas supply before inspecting or repairing any components. Safety is paramount when working with gas-powered systems.
Inspect and Clean the Ignitor
Locate the ignitor, usually near the burner assembly. Look for signs of cracking or wear. If visually damaged, it requires replacement. For minor dirt, cleaning carefully with a soft cloth may help, but replacement is often recommended since ignitors are delicate components.
Check and Clean the Flame Sensor
The flame sensor detects the presence of fire. Over time, soot and residue can build up, preventing accurate flame sensing. Remove the sensor and clean it gently with fine-grit sandpaper or steel wool. After cleaning, reinstall and test the furnace.
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Verify Gas Flow and Pressure
Confirm the gas valve is open and the supply to the furnace is consistent. If the gas pressure is low or interrupted, the flame will fail to ignite, causing the error code. Call a professional technician if you suspect a gas supply issue.
Check Electrical Connections and Control Board
Loose or corroded wiring can interfere with ignition signals. Inspect all visible wiring and connectors, ensuring they are secure and intact. Faulty control boards might also trigger error codes erratically and may need professional diagnosis.
Professional Repair and Replacement Options
If troubleshooting steps do not resolve the error, contacting a licensed HVAC technician is crucial. A professional can:
- Conduct detailed diagnostics on electrical and gas systems.
- Replace ignitors, flame sensors, or control boards as needed.
- Inspect the furnace’s combustion system and airflow.
- Ensure all repairs comply with safety standards and manufacturer guidelines.
Preventive Maintenance Tips to Avoid Error Code 59
Regular upkeep can reduce the likelihood of ignition-related errors:
- Schedule annual furnace inspections with HVAC professionals.
- Clean or replace filters regularly to maintain proper airflow.
- Keep the burner area and flame sensor clean.
- Monitor system performance and respond promptly to unusual noises or error codes.
- Keep the area around the furnace clear of dust and debris.
When to Replace Your Rheem Furnace
If Error Code 59 recurs frequently, and repairs become costly, consider furnace replacement. Older units may have degraded components that repeatedly fail. Upgrading can provide:
- Improved energy efficiency
- Enhanced safety features
- Reliable, consistent heating performance
- Reduced maintenance and repair costs over time
Summary
| Aspect | Details |
|---|---|
| Error Meaning | Ignition failure or burner does not light properly |
| Main Causes | Faulty ignitor, dirty flame sensor, gas supply issues, electrical faults |
| Key Troubleshooting | Inspect ignitor and flame sensor, clean sensors, check gas supply, examine wiring |
| Professional Help | Recommended if DIY steps do not resolve issue or for gas supply diagnosis |
| Maintenance Tips | Regular cleanings, filter changes, professional inspections |