9 Things You Should Look Out For When Repairing Your Gas Furnace
Gas furnaces are a must for keeping homes warm during the winter months in Memphis. Like any mechanical system, these machines can be finicky sometimes, affecting their performance.
Taking care of these issues quickly helps you avoid serious and expensive repairs. While some furnace issues require professional help, many common problems can be fixed by homeowners who are willing to put in a bit of effort. We’ve got some tips to help you repair a gas furnace and keep it in tip-top shape this winter.
Why Fixing Gas Furnace Issues Matters
Ignoring furnace problems leads to major headaches (who wants to be freezing in their own home?), including safety risks. A malfunctioning gas furnace might result in higher energy bills, a chilly home, and, in severe cases, hazardous situations like gas leaks or carbon monoxide exposure. Also, you may even have to replace the whole system sooner than you’d like.
When you address issues early, you can prolong the life of your furnace, keep it working properly, and maintain a safe environment at home.
Preparing to Troubleshoot Your Gas Furnace
Before you dive into any DIY fixes, let’s get you prepped. Begin by locating your furnace’s owner’s manual. This document provides specific details about your furnace model, troubleshooting advice, and safety warnings.
If you’ve misplaced the manual, don’t worry—most manufacturers have digital versions available online. Simply search using your furnace’s model and serial numbers.
Safety is a top priority. Before beginning any work, cut the power at the breaker box before you start tinkering. This step prevents accidents like electrical shocks while you work.
What Are Common Gas Furnace Problems and Solutions?
Pilot Lights Troubles
A common issue with furnaces is a pilot light that won’t stay lit. This problem is often caused by a faulty or loose thermocouple, a clogged pilot orifice, or a low flame setting. The thermocouple is a safety device that shuts off the gas if the pilot light goes out and can malfunction if it’s loose or damaged.
To address this:
- Start by tightening the thermocouple so that it’s securely in place.
- Clear the pilot orifice with a thin wire or needle if it is clogged.
- Check the flame size, and if it’s too low, adjust it by turning the pilot adjustment screw until you achieve a steady, blue flame.
No Heat at All
If your furnace isn’t producing heat, begin with the basics first. Confirm that your thermostat is set to “heat” and that the temperature is higher than the present room temperature. If that doesn’t resolve the issue, check whether the furnace is receiving power. A tripped breaker could be the cause, so inspect the breaker box and reset it if necessary.
Next, look at the pilot light. If it’s out, follow the steps mentioned earlier to relight it. Also, make sure the gas valve is open and allows gas to flow to the furnace. If the valve is closed, turn it on and relight the pilot.
Broken Fans
A broken fan can lead to various issues, including poor heating or an overheating furnace. To diagnose a fan problem, set your thermostat to the “fan only” mode. If the fan doesn’t start, it’s likely malfunctioning.
Take a look at the circuit breaker and reset it if necessary. If the breaker is fine but the fan still doesn’t work, you may need to replace the fan motor. But always consult your furnace manual for instructions on replacing the fan, as each model can have unique requirements.
Defective Blowers
If the blower isn’t functioning properly, it might be due to a clogged blower wheel, a blocked blower door, a worn belt, or an overloaded motor. These issues can prevent your furnace from distributing heat effectively.
To fix this, begin by cleaning any debris from the blower wheel so that it can spin freely. Next, check the blower door and confirm it’s properly closed, as the furnace won’t operate if the door is open.
Scan the belt for signs of wear and replace it if needed. Finally, if the blower motor seems overloaded, refer to the manual for specifications and consider replacing the motor if required.
Bad Electrical Connections
Sometimes, electrical hiccups prevent your furnace from working. Start by checking the breaker box for a blown fuse or tripped breaker. If you see a tripped breaker or blown fuse, reset the breaker or replace the fuse.
If the problem keeps happening, it might be too complex for a simple DIY fix. In these cases, it’s best to contact the pros, as working with electrical components can be dangerous.
Our team at Mister Greenway is always ready to help you with your furnace repair needs when you need us.
Clogged or Dirty Air Filter
A clogged or dirty air filter is a common cause of furnace problems. It restricts airflow, forcing the furnace to work harder and leading to overheating and reduced efficiency. This can cause serious damage to your furnace system over time.
Check your filter monthly, especially during heavy usage periods. If it appears clogged or dirty, replace the filter with a new one. We generally recommend changing the filter every three months to keep your furnace running smoothly.
Thermostat Malfunctions
Issues with the thermostat can cause inconsistent heating or no heating at all.
To diagnose thermostat problems:
- Start by turning off the power to the furnace.
- Pull out the thermostat cover and clean it with a soft brush to get rid of debris and dust.
- Check for corrosion on the wire connections and clean or replace them as needed. If your thermostat is battery-operated, try replacing the batteries.
If these steps don’t solve the issue, you may need to replace your thermostat.
Airflow Problems
Airflow issues often result from a dirty or improperly installed filter or closed or blocked vents. These problems can prevent your furnace from heating your home evenly.
To correct airflow problems:
- Start by replacing the filter if it’s dirty or incorrectly installed.
- Check all the vents in your home and make sure they’re open and clear.
- If your gas furnace has a reset button, press it to reset the system and see if that resolves the issue.
Strange Furnace Noises
Furnaces can make various noises, each indicating a different problem. For example, popping sounds might be caused by ductwork expanding and contracting with temperature changes. Rattling could indicate loose panels or components. Grinding noises often signal worn bearings in the motor, while squealing may be due to a slipped or worn belt.
To address these issues:
- Start by inspecting the ductwork for any loose sections and securing them.
- Tighten any loose panels on the furnace. If you hear grinding, shut off the furnace immediately and consult a professional to avoid further damage.
- For squealing sounds, check the belt and replace it if necessary.
When to Call a Professional in Memphis: Mister Greenway on the Way
Keeping your gas furnace in decent working condition is key to staying warm during Memphis winters. You may be tempted to try and fix everything yourself. But sometimes, it’s best to leave it to the experts. If you’ve tried these tips and you’re still having issues, or if you’re dealing with something that seems more complex, don’t hesitate to call for help.
Mister Greenway Plumbing, Heating & Air Conditioning offers the help you need, with certified technicians ready to tackle any furnace service. Feel free to give us a call. We’ll have a technician at your door in under 30 minutes, equipped to diagnose and repair your furnace efficiently.
Remember, a well-maintained gas furnace is a happy heating system. And a happy heating system means a cozy home for you and your family.
