Furnace Needs To Be Reset Often

Furnace Needs to Be Reset Often? Troubleshooting Common Causes

Is your furnace constantly requiring a reset? This frustrating problem points to an underlying issue that needs attention. Ignoring it can lead to further damage and potentially dangerous situations. This article will explore the common reasons why your furnace needs frequent resets and guide you through troubleshooting steps to identify and fix the problem. Understanding the root cause is crucial for preventing future disruptions and ensuring your home stays warm and safe.

Why Does My Furnace Keep Tripping?

A furnace that needs frequent resets usually indicates a safety mechanism is activating, shutting down the system to prevent damage or hazard. This is typically triggered by a problem within the furnace itself, rather than a simple power outage. The most frequent culprits include:

1. Overheating

• The Problem: Your furnace might be overheating due to restricted airflow, a faulty blower motor, clogged air filters, or a malfunctioning heat exchanger. The overheat safety switch cuts power to prevent damage to the unit.
• Troubleshooting: Check your air filter for excessive dirt or debris. Clean or replace it as needed. Inspect the vents and registers throughout your home to ensure they are open and unobstructed. Listen carefully to the blower motor – unusual noises or a lack of airflow could point to a problem. Professional inspection is recommended if you suspect heat exchanger issues, as this is a critical component.

2. Limit Switch Problems

• The Problem: The limit switch is a safety device that monitors the temperature of the furnace. If it malfunctions, it may shut down the system prematurely and repeatedly.
• Troubleshooting: This component requires professional assessment and likely replacement. Do not attempt to repair this yourself.

3. Igniter Issues

• The Problem: A faulty igniter can prevent the furnace from properly lighting the burners. Repeated attempts to ignite can cause the system to overheat, leading to shutdowns.
• Troubleshooting: If the igniter glows weakly or not at all, you’ll need a professional technician to diagnose and replace the component. You might hear clicking sounds without the burner igniting – this is a strong indicator of an igniter problem.

4. Flame Sensor Problems

• The Problem: The flame sensor detects the presence of a flame. If it's dirty or malfunctioning, the furnace might shut down, believing the flame isn't present.
• Troubleshooting: The flame sensor can often be cleaned; however, if cleaning doesn't resolve the issue, it will likely need replacing by a qualified HVAC technician.

5. Inducer Motor Problems

• The Problem: The inducer motor helps to draw combustion air into the furnace. If it fails, the furnace won't be able to ignite properly and may shut down.
• Troubleshooting: This component requires professional evaluation and likely replacement.

6. Gas Valve Problems

• The Problem: A malfunctioning gas valve may not properly supply gas to the burners, resulting in failed ignition attempts and frequent shutdowns.
• Troubleshooting: A qualified technician should examine the gas valve to assess functionality and potentially replace it. This is a component that should only be handled by a trained professional due to gas safety regulations.

When to Call a Professional

While some minor troubleshooting can be done independently (like checking and cleaning the air filter), many of the problems listed above require the expertise of a qualified HVAC technician. Don't attempt repairs involving gas lines or electrical components yourself. Ignoring these issues can lead to dangerous situations, including carbon monoxide leaks.

Preventive Maintenance

Regular maintenance is crucial in preventing frequent furnace resets. This includes:

• Annual inspections: Schedule a professional inspection and tune-up annually.
• Air filter changes: Replace your air filter every 1-3 months, or more frequently if you have pets or allergies.
• Keeping vents clear: Ensure all vents and registers are open and free of obstructions.

By addressing the root cause of your furnace's frequent resets, you can ensure a comfortable and safe home environment throughout the heating season. Remember, safety should always be the top priority. Don't hesitate to contact a professional HVAC technician if you are unsure about any aspect of troubleshooting your furnace.