Is your furnace acting up? At Kova Heating & Cooling, we’re the reliable team you can count on! Call us for expert service at (360) 823-3111.

Living in the Pacific Northwest means dealing with cold, damp winters where reliable heating isn’t just a comfort—it’s essential. When temperatures drop and the rain keeps falling, you need your furnace working at its best to keep your family warm and comfortable.

Unfortunately, furnaces can develop various problems over time. While some minor issues can be handled by homeowners, most furnace problems require professional attention to ensure safe and effective repairs.

At Kova Heating & Cooling, we’ve seen it all when it comes to furnace troubles. Here are six of the most common problems we encounter and what you can do about them.

1. Dirty Air Filters

One of the most frequent causes of furnace problems is something completely preventable: dirty air filters. Your furnace filter plays a crucial role in maintaining both system efficiency and indoor air quality.

How it affects your furnace:

• Forces your system to work harder to pull air through
• Reduces airflow, causing overheating
• Allows dust and debris to accumulate on internal components
• Increases energy consumption and utility bills
• Can cause premature system failure

The solution: Change your air filters every 1-3 months, depending on your home’s conditions. Set calendar reminders to stay on track. This simple maintenance task can prevent costly repairs and keep your family breathing clean air.

2. Damaged Blower Components

Your furnace blower is responsible for circulating warm air throughout your home. When blower components fail, you’ll notice reduced airflow or strange noises coming from your system.

Ball Bearings

Worn or damaged ball bearings create scraping or grinding sounds. This typically happens due to normal wear and tear or improper installation. Turn off your furnace immediately if you hear these sounds—continuing to run the system can cause extensive damage.

Blower Belts

A squealing noise often indicates belt problems. The belt may have shifted out of place, become stretched, or cracked. While minor adjustments might seem simple, belt replacement requires professional expertise to ensure proper tension and alignment.

Capacitors

The capacitor provides the electrical boost needed to start your blower motor. When capacitors fail, you might experience:

• Higher energy bills
• Frequent breaker trips
• Furnace cycling on and off randomly
• Complete system failure

3. Faulty Thermostat

Sometimes furnace problems aren’t actually furnace problems at all—they’re thermostat issues. Your thermostat acts as the command center for your heating system, and when it malfunctions, your entire system suffers.

Common thermostat problems:

• Incorrect placement near drafts or heat sources
• Faulty wiring connections
• Dead batteries
• Calibration issues
• Outdated or incompatible models

What you can try: Start by replacing the batteries and checking that your thermostat is set to “heat” mode. If problems persist, contact Kova Heating & Cooling for professional diagnosis and repair.

4. Defective Limit Switch

The limit switch is a critical safety component that monitors your furnace’s internal temperature. When working properly, it prevents dangerous overheating by shutting down the burners when temperatures get too high.

Signs of limit switch problems:

• Furnace runs continuously without cycling off
• System shuts down frequently
• Inconsistent heating throughout your home
• Safety concerns due to potential overheating

This is definitely a job for professionals. A malfunctioning limit switch can create serious safety hazards, including fire risk.

5. Malfunctioning Flame Sensor

The flame sensor (part of the limit switch system) detects whether your pilot light or burner flame is lit. When it can’t detect the flame properly, it triggers a safety shutdown to prevent gas buildup.

Common causes:

• Dust and debris buildup on the sensor
• Corroded or damaged sensor components
• Improper sensor positioning

While you might be able to carefully clean a lightly soiled flame sensor, this component requires delicate handling. If you’re not comfortable working around gas appliances, it’s best to call professionals.

6. Skipping Regular Maintenance

The biggest furnace problem? Neglecting routine maintenance. Regular professional maintenance is your best defense against unexpected breakdowns and costly repairs.

What professional maintenance includes:

• Thorough system inspection and cleaning
• Filter replacement
• Component testing and calibration
• Safety system checks
• Early detection of potential problems
• Efficiency optimization

Annual maintenance not only prevents problems but also extends your furnace’s lifespan and keeps your warranty valid.

When to Call the Professionals

While changing filters and replacing thermostat batteries are reasonable DIY tasks, most furnace problems require professional attention. Contact Kova Heating & Cooling immediately if you notice:

• Strange noises (grinding, squealing, banging)
• Inconsistent heating or complete heating failure
• Unusual smells (gas, burning, musty odors)
• Frequent cycling on and off
• Higher than normal energy bills
• Any safety concerns

Trust Kova Heating & Cooling for All Your Furnace Needs

Don’t let furnace problems leave you and your family in the cold. At Kova Heating & Cooling, we provide expert furnace repair and maintenance services throughout Portland & Vancouver

Our experienced technicians have the knowledge and tools to diagnose and fix any furnace problem quickly and safely. We’re committed to keeping your home comfortable and your family safe, no matter what Mother Nature throws at us.

Ready to schedule your furnace maintenance or need emergency repairs? Call Kova Heating & Cooling at (360) 823-3111 today. We’re here to keep your home warm and comfortable all winter long.