Carrier Furnace Flame Rollout Switch Manual Reset
The Carrier furnace flame rollout switch is a critical safety component that detects dangerous flame rollout conditions and shuts down the furnace to prevent fire hazards. When triggered, the switch requires manual resetting to restore furnace operation. This manual covers safety procedures, reset instructions, troubleshooting, and maintenance guidelines for Carrier furnace flame rollout switches.
Safety Precautions
Before attempting any reset procedure, ensure proper safety measures are followed.
| Precaution | Description |
|---|
| Power Disconnect | Turn off furnace power at circuit breaker before inspection |
| Gas Valve | Shut off gas supply valve before working on furnace |
| Cool Down Period | Allow furnace to cool completely before touching components |
| Proper Tools | Use insulated tools and wear protective gloves |
| Ventilation | Ensure adequate ventilation in work area |
| Fire Extinguisher | Keep fire extinguisher nearby as precaution |
| Carbon Monoxide | Install CO detectors near furnace area |
| Professional Help | Contact certified technician if unsure about any procedure |
Understanding Flame Rollout
Flame rollout occurs when combustion flames escape the heat exchanger chamber, indicating dangerous conditions.
- Normal Operation: Flames contained within heat exchanger tubes
- Rollout Condition: Flames extend outside burner assembly
- Switch Activation: High temperature triggers safety switch
- System Shutdown: Gas valve closes, furnace stops operation
WARNING! Repeated rollout indicates serious problems requiring professional diagnosis.
Locating the Rollout Switch
The flame rollout switch is typically mounted near the burner assembly.
- Remove furnace access panel following manufacturer instructions
- Locate burner assembly at bottom front of furnace
- Identify small rectangular switch with red reset button
- Switch is usually mounted on metal bracket near burners
- Follow flame sensor wire to locate rollout switch
CAUTION! Do not force access panels; follow proper removal procedure.
Reset Procedure
Follow these steps carefully to reset the flame rollout switch.
- Power Down: Turn off furnace at thermostat and circuit breaker
- Gas Supply: Ensure gas valve is in OFF position
- Access Panel: Remove front access panel safely
- Locate Switch: Find rollout switch near burner assembly
- Press Reset: Firmly press red reset button until click is heard
- Reassemble: Replace access panel securely
- Restore Power: Turn circuit breaker and gas valve back on
- Test Operation: Set thermostat to call for heat and observe startup
WARNING! If switch trips again immediately, do not continue resetting - contact professional.
Common Causes
Understanding what triggers flame rollout helps prevent recurrence.
- Blocked Vent Pipe: Obstruction in flue or chimney
- Cracked Heat Exchanger: Allows flames to escape chamber
- Dirty Burners: Improper flame pattern due to debris
- Faulty Gas Pressure: Incorrect gas valve settings
- Blocked Air Intake: Restricted combustion air supply
- Draft Inducer Failure: Weak or failed draft motor
- Improper Installation: Incorrect vent sizing or configuration
Troubleshooting Steps
Systematic approach to identify rollout causes.
| Symptom | Possible Cause | Corrective Action |
|---|
| Switch trips immediately | Cracked heat exchanger | Visual inspection; professional replacement required |
| Trips after few minutes | Blocked vent pipe | Inspect and clear flue obstructions |
| Intermittent tripping | Dirty burners | Clean burner ports and assembly |
| Loud rumble before trip | Delayed ignition | Check igniter and gas valve timing |
| Yellow flames visible | Insufficient air | Check air intake and combustion chamber |
Maintenance Guidelines
Regular maintenance prevents flame rollout issues.
- Annual Inspection: Professional furnace checkup before heating season
- Filter Replacement: Change air filters every 1-3 months
- Burner Cleaning: Professional burner cleaning annually
- Vent Inspection: Check flue pipes for blockages or damage
- Heat Exchanger: Visual inspection for cracks or corrosion
- Draft System: Test inducer motor and pressure switches
Tip: Keep area around furnace clear of combustible materials.
When to Call a Professional
Certain conditions require certified technician intervention.
- Rollout switch trips repeatedly after reset
- Visible cracks in heat exchanger
- Gas odor detected near furnace
- Carbon monoxide alarm activation
- Unusual noises (banging, rumbling, screeching)
- Yellow or flickering flames instead of steady blue
- Soot accumulation around burners
- Water leakage from furnace
Specifications
- Switch Type: Manual reset thermal cutoff
- Temperature Rating: Typically 200-250°F trip point
- Reset Method: Manual push-button reset
- Electrical Rating: 120V AC, 5-15A depending on model
- Mounting: Bracket mounted near burner assembly
- Compatibility: Carrier furnace models with safety rollout protection
- Color: Usually red reset button with white or silver housing
Warranty Information
Carrier furnace components covered by limited warranties.
| Component | Warranty Period | Coverage |
|---|
| Heat Exchanger | 20 Years | Limited lifetime on original installation |
| Parts | 10 Years | Manufacturer defects in materials/workmanship |
| Labor | 1 Year | Installation labor for registered products |
| Rollout Switch | 5 Years | Safety component coverage |
Register product within 90 days of installation for full warranty benefits.
Contact Support
For technical assistance or professional service.
- Carrier Customer Service: 1-800-CARRIER (1-800-227-7437)
- Website: www.carrier.com/residential
- Email Support: [email protected]
- Find Dealer: Use online dealer locator for local technicians
- Emergency Service: Contact local HVAC contractors for urgent issues
Emergency: If gas odor detected, evacuate immediately and call gas company.
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