The Ruud furnace reset button is a compact safety feature that can restore operation after certain electrical or safety interruptions. This guide explains where to find the reset, how to use it safely, common reasons it trips, troubleshooting steps, and when to contact a professional. It emphasizes safety and practical troubleshooting for U.S. homeowners and HVAC technicians.
| Item | Quick Facts |
|---|---|
| Location | Typically near the blower motor or control panel |
| Purpose | Protects against motor overloads and electrical faults |
| Appearance | Red or black recessed button or small push button |
| When To Reset | After power interruption, overheating, or motor stall |
| When To Call A Pro | Repeated trips, burning smell, or no power to unit |
What Is The Ruud Furnace Reset Button?
The Ruud furnace reset button is a manual safety device designed to interrupt power to the blower motor or control board when an overload, fault, or unsafe condition occurs. The reset allows the system to be restarted after a temporary fault clears. It is not a substitute for proper diagnosis and repair.
Where To Find The Reset Button On Ruud Furnaces
Location varies by model and age, but common places are on the blower motor housing, inside the furnace control compartment, or on the exterior access panel. On many Ruud models the reset is a small recessed red button requiring a tool or paperclip to press.
How To Safely Reset A Ruud Furnace
Safety first: always turn off the thermostat, then switch off the furnace power using the service switch or the breaker. Wait five minutes to allow capacitors to discharge and sensors to stabilize. Press the reset button firmly for one to two seconds, then restore power and set the thermostat. Observe the unit for proper startup and normal operation.
Step-By-Step Reset Procedure
- Turn Thermostat To Off.
- Switch Off Furnace Power At The Service Switch Or Circuit Breaker.
- Wait Five Minutes.
- Locate The Reset Button (Often Red And Recessed).
- Press And Release The Reset Button Once.
- Restore Power And Set Thermostat To Heat.
- Watch For Proper Ignition And Blower Operation.
Common Reasons The Reset Button Trips
A reset trip indicates an abnormal condition. Common causes include blower motor overload, capacitor failure, blocked return or supply vents, dirty air filters, failed limit switches, control board faults, and intermittent electrical supply problems.
Blower Motor Overload
If the motor draws excessive current due to worn bearings, dirt, or a seized shaft, the internal overload will trip and require manual reset once the motor cools.
Capacitor Failure
A weak or shorted capacitor can prevent the motor from starting properly, causing repeated overload trips and necessitating capacitor replacement.
Airflow Restrictions
Clogged filters, blocked vents, closed dampers, or obstructed return ducts reduce airflow, causing heat buildup and tripping safety devices such as the high-limit switch.
Electrical Problems
Loose wiring, corroded connectors, damaged control boards, and voltage fluctuations can create conditions that trip the reset or other safety devices.
Troubleshooting Checklist Before Resetting
Perform a quick inspection before pressing the reset to avoid repeated trips or damage. The checklist helps identify simple issues that may cause a trip.
- Ensure The Thermostat Is Set To Heat And Functioning.
- Confirm The Furnace Power Switch And Breaker Are Off Before Inspecting.
- Check And Replace Dirty Air Filters.
- Look For Blocked Vents, Registers, Or Returns.
- Inspect Visible Wiring For Burns, Loose Connections, Or Damage.
- Smell For Burning Or Melted Plastic Before Resetting; If Present, Do Not Reset.
How To Diagnose Repeated Trips
If the reset button trips repeatedly after resetting, further diagnosis is required. Document conditions when the trip happens and perform component-level testing or call a certified technician.
Testing The Blower Motor
Measure motor amperage and compare it to the nameplate rating. A motor drawing excessive current likely needs service or replacement. Check motor bearings and shaft rotation for binding.
Checking The Capacitor
Use a multimeter with capacitance testing to verify the start/run capacitor values. Replace if outside manufacturer tolerance or if bulging/leaking is visible.
Examining Control Board And Sensors
Control boards can fail and present irregular behavior. Inspect for burnt components, bad solder joints, or error codes indicated by LEDs. Replace or service the board when diagnostics point to it.
When To Call A Professional HVAC Technician
Contact a licensed HVAC technician when the reset button trips repeatedly, when there are signs of electrical burning, when the unit fails to start despite resetting, or when safety devices such as the limit switch are involved. Technicians perform safe electrical testing and component-level repairs.
Replacement And Repair Considerations
Ruud furnaces use either integrated motor overloads or separate reset switches. When the reset is damaged, corroded, or missing, replacement parts must match the original specification. For motors with internal thermal overloads, motor replacement or repair may be necessary.
OEM Parts And Compatibility
Use Ruud OEM parts or manufacturer-recommended equivalents to retain safety and performance. Cross-referencing part numbers and model numbers ensures compatibility with the furnace control system.
Cost Factors
Costs vary: a simple reset switch replacement can be low-cost, while a blower motor or control board replacement is higher. Labor and regional pricing affect the final bill.
Preventive Maintenance To Avoid Trips
Regular maintenance reduces the chance of reset trips. Basic preventive actions extend component life and improve reliability.
- Replace Or Clean Air Filters Monthly Or Per Manufacturer Guidance.
- Schedule Annual HVAC Tune-Ups To Inspect Motors, Capacitors, And Controls.
- Keep Combustion And Ventilation Paths Clear.
- Ensure Proper Thermostat Calibration And Wiring Integrity.
- Monitor For Unusual Noises Or Odors And Address Promptly.
Safety Tips And Warnings
Never attempt electrical repairs without shutting off power at the breaker. A reset action may clear a symptom but not the underlying fault. If there is any burning smell, visible damage, or uncertainty, avoid resetting and call an HVAC technician.
How To Identify The Right Reset Button On Different Ruud Models
Small residential Ruud furnaces commonly use a recessed reset on the blower housing. Larger or newer models may use electronic protections instead. Consult the furnace data plate and user manual for model-specific information and diagrams.
Finding Model Information
Locate the data plate on the furnace cabinet for model and serial numbers. Use these to download the correct manual from Ruud’s official website or provide to a technician for accurate diagnosis.
Common User Questions
Is It Safe To Reset The Button Repeatedly?
Repeated resets are a symptom, not a solution. It is not safe to keep resetting without diagnosing the cause. Continuous trips can indicate serious electrical or mechanical faults risking further damage.
Will Resetting Void The Warranty?
Resetting the button typically does not void a warranty, but performing improper repairs or using non-OEM parts might. Always check the warranty terms and use authorized service providers when repairs are covered.
Can Homeowners Replace The Reset Button?
Homeowners with electrical experience can replace accessible external reset switches, provided power is off. For internal motor overloads or complex repairs, professional service is recommended.
Useful Resources
- Ruud Official Website — Manuals, support, and part lookup.
- Energy Star — Guidance on HVAC efficiency and maintenance.
- National Fire Protection Association — Safety standards and electrical safety resources.
Quick Troubleshooting Flowchart (Text Version)
Power Off → Inspect Filters/Vents → Locate Reset → Smell/Burn Visible? If Yes, call pro. If No, Press Reset Once → Restore Power → Observe Operation. If Trip Repeats, document symptoms and call HVAC technician.
Replacement Parts And Costs (Typical Ranges)
| Part | Typical Cost Range (Parts Only) |
|---|---|
| Reset Switch | $10–$40 |
| Start/Run Capacitor | $20–$70 |
| Blower Motor | $150–$700 |
| Control Board | $100–$500 |
Final Practical Advice
Use the reset button as a controlled restart after addressing obvious issues like filters and blocked ducts. Treat repeated trips or electrical signs seriously and schedule professional service to prevent larger failures and maintain safety.