Common Furnace Problems and Solutions

In St. Louis with the cold winter days and nights, furnaces are an essential component of home comfort. However, like any piece of equipment, they can experience issues over time. This guide explores the most common furnace problems and provides practical solutions to help you address them. By understanding these issues, you can ensure your furnace operates efficiently and keeps your home warm all winter long.

To learn more or schedule furnace repair services in the greater St. Louis area, contact the experts at Galmiche & Sons today.

Identifying and Resolving Common Furnace Problems

Knowing what to look for is the first step in resolving furnace issues. Here are some of the most frequent problems homeowners encounter along with some basic tips on resolving them:

1. Furnace Fails to Start

A furnace that won’t start is a common concern. Possible causes and solutions include:

Power supply issues: Check the circuit breaker and ensure the furnace is plugged in.
Thermostat problems: Verify that the thermostat is set to “Heat” and the temperature is set appropriately. Replace the batteries, adjust the settings, and clean the unit if necessary.
Ignition system failure: For older furnaces, this could mean a pilot light issue. For newer models, check the electronic ignition system.

2. Insufficient Heat

If your furnace runs but doesn’t provide adequate warmth, the issue could be:

Dirty or clogged air filters: Dirty air filters are a leading cause of furnace inefficiency. Replace filters every 1-3 months, depending on usage and filter type to maintain proper airflow.
Blocked vents or ducts: Ensure all vents and ducts are open and unobstructed. Dust and debris can interfere with furnace operation. Regularly clean around the furnace vents. You can also vacuum inside the unit if safe to do so
Malfunctioning blower motor: This component might need repair or replacement.

3. Frequent On-Off Cycling

A furnace that cycles on and off too frequently may indicate:

Thermostat issues: Ensure the thermostat is working correctly and is not near a heat source such as refrigerator, room space heater, or other appliance.
Overheating: This could be due to restricted airflow or a dirty heat exchanger.
Improper sizing: If the furnace is too large for your home, it may short cycle.

4. Strange Noises

Unusual sounds like banging, rattling, or screeching often point to mechanical problems such as:

Loose components: Tighten any loose screws or panels.
Worn-out belts: Replace belts that show signs of wear.
Motor issues: A professional inspection may be necessary.

5. Pilot Light Problems

The pilot light is critical for older gas furnaces. Common problems include:

Pilot light won’t stay lit: This could indicate a thermocouple issue. Learn how to light a pilot light on a furnace and tips for troubleshooting if it won’t stay lit.
Yellow pilot light flame: A yellow flame may suggest poor combustion or a carbon monoxide hazard.

Preventive Maintenance Tips

Preventing common furnace problems is often easier and less costly than repairing them. Here are some maintenance tips you should follow to ensure efficient and safe system performance:

Schedule Regular Inspections: Have a professional inspect and service your furnace annually.
Test Safety Features: Ensure carbon monoxide detectors are functional and positioned near the furnace.
Seal Ductwork: Leaky ducts can reduce efficiency and lead to uneven heating.
Monitor Energy Bills: A sudden increase in heating costs may signal furnace inefficiency.

Frequently Asked Questions About Common Furnace Problems

How do I know if my furnace needs repair?

Signs include insufficient heat, strange noises, frequent cycling, and unusually high energy bills.

Can I fix my furnace myself?

While basic troubleshooting is fine, most repairs should be handled by a professional to ensure safety and effectiveness.

Why does my furnace smell strange?

Odors can result from dust burning off after inactivity, gas leaks, or mold in the ducts. Investigate immediately and call a professional if necessary.

What’s the lifespan of a furnace?

With proper maintenance, most furnaces last 15-20 years. Older furnaces may need replacement for improved efficiency and reliability.

Contact Galmiche & Sons for Furnace Repair Services in St. Louis

If you’re experiencing common furnace problems, Galmiche & Sons is here to help. With over 70 years of experience serving St. Louis homes and businesses, we offer reliable repair, maintenance, and installation services. Our team is dedicated to keeping your home comfortable and your furnace running smoothly.

Contact us today to schedule a service appointment or learn more about our heating and cooling solutions. Let Galmiche & Sons be your trusted partner for all your furnace needs!