How To Check If Furnace Is Working? Vital Tips

To make sure your gas furnace is running smoothly, you’ll need to perform regular maintenance and check for signs of malfunction. To do this, follow these three steps: Learn why regular maintenance is crucial, recognize the telltale signs of a malfunctioning furnace, then follow our simple guide to checking your furnace for issues.

How To Check If Furnace Is Working

Importance of Regular Maintenance

Keep your furnace in good shape! Regular maintenance is necessary to make sure it’s working properly. Without it, you can expect rising energy bills, reduced efficiency, and even dangerous carbon monoxide leaks. Don’t wait until you have a breakdown in winter – check and maintain your furnace at least once a year.

An HVAC professional will inspect it thoroughly, clean or replace air filters, lubricate parts, and tighten bolts. They’ll also watch out for cracks in the heat exchanger that could be emitting carbon monoxide.

Pay attention to your furnace during the year too. Listen for unusual sounds and sniff for strange odors. If you feel a decrease in airflow or inconsistent temperatures in different rooms, it’s time to get it checked.

Regular maintenance will extend the life of your furnace and keep it efficient. Plus, it will keep you safe. Schedule your annual furnace maintenance today!

Signs of a Malfunctioning Furnace

Your furnace is the heart of your heating system in winter. Here are some signs it might be malfunctioning:

  • Unusual or loud noises. Banging, rattling, or squeaking could indicate something’s wrong.
  • Constant on-off cycles. This could mean overheating or thermostat issues.
  • Higher energy bills. If you see a hike without changing usage, your furnace may be ineffective or overworked.

Check for clogged filters, pilot light problems, and carbon monoxide leaks. These can be dangerous.

To avoid these issues, service your furnace annually with a pro. This keeps it running efficiently and catches small issues before they become big ones. Set up a programmable thermostat too – it helps regulate temperature and extends the furnace’s life.

Regularly check your heating system and act fast if you spot any red flags. Don’t skip this or your furnace might stop heating altogether.

Steps to Check Your Furnace

Time to inspect your furnace! Here are 5 steps for a successful checkup:

  1. Check the thermostat. Set it to heat mode and adjust the temperature to higher than the room temperature. If the furnace doesn’t start after a few minutes, go to step 2.
  2. Check the power supply. Make sure the fuse or circuit breaker is turned on and functioning properly.
  3. Inspect the air filters. Dirty or clogged filters can limit airflow, decreasing efficiency or even causing a system shutdown. Check them monthly and replace them when needed.
  4. Look for visible damages. Open panels to examine pipes, wires, and exhaust ducts. If you find anything broken, corroded, or disconnected, turn off the power supply first before trying to fix it.
  5. Call a professional. Need help? A certified technician can assess if all components like blowers, flame sensors, and gas valves are working properly.

Safety is key! Always follow manufacturer guidelines for service manuals. Additionally, clean any dust accumulation around heating vents and get an HVAC pro to inspect the system every year.

Fun Fact: The National Fire Protection Association (NFPA) reported that heating equipment was involved in more than 48,000 home structure fires in 2018, resulting in deaths and property damage.

Step-by-Step Guide to Checking Your Furnace

To make sure your gas furnace is functioning properly this heating season, you need to give it a thorough inspection. In this step-by-step guide to checking your furnace with various sub-sections, you will know how to inspect all the crucial components of your furnace, from the thermostat to blower motors, burners, ignition sensors, circuit breakers, and more. Checking the thermostat, inspecting the furnace filter, checking the pilot light, checking the burners, inspecting the blower motor, checking the limit switch, inspecting the ignition sensor, checking the flame sensor, inspecting the safety switch, inspecting the gas valve and line, inspecting ducts and vents, inspecting heat exchanger, inspecting ignition and power switches, inspecting the circuit breaker and fuse, looking for any unusual sounds or noises, and inspecting for dirt and debris build-up are the vital steps to ensuring that your furnace is working as it should be.

Checking the Thermostat

The thermostat is important for your furnace. To check it, set it to heat and raise the temp a few degrees. Wait a few minutes for the furnace to start. Check if warm air is coming from the vents. Observe if the heat is turning off at the desired temp and if it’s cycling on and off correctly. If you notice any issues, look at your furnace manual or call a professional.

The National Fire Protection Association says homeowners should have their furnaces checked once a year by a qualified person. Remember to regularly check your thermostat and do other maintenance such as changing filters and inspecting ductwork. Your furnace filter is like a traffic cop, controlling the airflow and making sure the bad stuff doesn’t get through.

Inspecting the Furnace Filter

As a responsible homeowner, it’s essential to keep your furnace running optimally. Inspecting the filter regularly is key. Here are the steps:

  1. Turn off the furnace: Ensure the furnace is off before making any inspection.
  2. Locate the filter: Check where the filter is situated as each model has different configurations.
  3. Read the label: Look for the filter size, shape, and typewriting on its label and check that it matches the operating manual.
  4. Check cleanliness: Gently take out the filter and check if it needs cleaning or replacing (depending on if it’s reusable or disposable).
  5. Cleaning: Vacuum or wash reusable filters with warm water and let them dry before putting them back in place.
  6. Replacement: If disposable filters are dirty, dispose of them properly and replace them with new ones using the right model number.

Remember, changing your furnace’s filter once a year won’t save you money – Consumer Reports magazine says to change it every three months! Also, check that the pilot light is actually lit – don’t be fooled like your ex’s commitment!

Checking the Pilot Light

Checking your furnace’s pilot light is a must for safe and efficient operation. Follow these 6 steps to do it yourself:

  1. Turn off the power and locate the access panel.
  2. Spot the pilot light assembly.
  3. Verify that the gas valve is open.
  4. Light a match or use a long-handled lighter near the tube opening.
  5. Press the reset button and keep it down for 30 seconds.
  6. Put back the access panel and turn on the power.

Read the manual for extra help, or contact an expert if confused. Weak or no pilot light could be due to blocked air vents, faulty thermocouples, or valves. If you notice any issues with the furnace, call a certified technician right away.

Remember: don’t risk your family’s safety and comfort – schedule regular maintenance for your heating system today! Plus, don’t be scared to investigate the furnace burners – they won’t bite…probably.

Checking the Burners

Your furnace’s burners require periodic maintenance. Here’s what you should do:

  1. Turn off the power and gas supply.
  2. Remove the front panel.
  3. Turn the power and gas back on. Turn up the thermostat. See if any burners don’t ignite.
  4. If any don’t light, turn off the power and gas again. Clean them with a wire brush.

It’s important to clean your burners and check them yearly for signs of damage.

Did you know modern furnaces have electronic ignition systems? They are more energy efficient and safer than pilot lights.

Show your blower motor some love; neglect is the top cause of furnace problems.

Inspecting the Blower Motor

The blower motor is a key piece of your furnace. Inspecting it is important for your heating system to run well. Here’s how to inspect it:

  1. Turn off the power supply – To stay safe, turn off the power first.
  2. Access the blower compartment – Remove the panel by unscrewing or opening latches.
  3. Examine the blower wheel and housing – Check the wheel for dirt and the housing for corrosion.
  4. Check bearings and belts – Make sure bearings are lubricated and belts are not worn out.

After inspection, put on the panel cover and turn on the power. Soon you’ll know if your furnace is working.

A malfunctioning blower motor can lead to reduced airflow, overheating, or costly repairs.

It all started in 1902 with Willis Carrier inventing air conditioning. This a great step towards modern-day HVAC systems. So, check the limit switch before your furnace takes things too far and burns down your house!

Checking the Limit Switch

Ensuring your furnace runs efficiently and safely is key. To check its limit switch, follow these 4 easy steps:

  1. Flip the switch near the unit or turn off the circuit breaker that powers it.
  2. Find the limit switch – a small rectangular box with wires coming in and out. Consult your manual or search online for its model and make.
  3. Remove the cover and inspect it for debris or corrosion.
  4. Replace the switch if any issues are found. A damaged switch can cause frequent shutdowns, overheating, and even carbon monoxide poisoning.

Don’t delay – inspect your furnace’s limit switch today! Making sure it has no commitment issues will help keep your home comfortable and safe all winter long.

Inspecting the Ignition Sensor

The furnace’s ignition sensor is a must-have component for the burner to ignite and provide heat. Six steps to inspect it:

  1. Cut the power to the furnace.
  2. Remove the access panel.
  3. Find the ignition sensor.
  4. Gently take it out with a screwdriver.
  5. Clean the sensor with sandpaper or steel wool until shiny.
  6. Reinstall and turn the furnace power back on.

Check for any wires or screws around the inspection area. Dirty sensors don’t always need replacing, they may just need a clean, like in step 5. Faulty wiring can also cause issues. Regularly check for signs of damage to wiring.

A customer got a surprise when my colleague inspected their furnace. Debris had covered the ignition sensor, preventing it from working properly. Cleaning it made a huge difference to clarity and efficiency. Cleaning and inspection are key for a long-lasting heating system.

Lesson learned: If your flame sensor is dirty, just tell it to take a shower – problem solved!

Checking the Flame Sensor

Checking the flame sensor is key to making sure your furnace functions correctly. It senses when the burners are lit and send a signal to the control board to keep it running. Here’s a guide to how to do it:

  1. Switch off the power or unplug.
  2. Take off the access panel to find the flame sensor.
  3. Gently remove it and clean it with steel wool or sandpaper.
  4. Look for any damage like cracks or bends in the probe or wires. If so, replace it.
  5. Re-install carefully.
  6. Connect power and turn on your furnace. Test it to see if it worked!

If the flame sensor doesn’t work after cleaning, it should be replaced.

If you notice odd changes in your utility bills, it’s best to call a professional. Heating systems take up 34% of home energy bills, according to Energy Star. And, Statista says the HVAC market was worth $175.2 billion in 2019.

The safety switch must be functional, otherwise, you might as well add ‘house fire’ to your winter to-do list!

Inspecting the Safety Switch

Locate the safety switch on your furnace. When you touch it, it should click. If no sound, then there’s a problem. You may need to replace it or contact a pro.

Remember to check your safety switch at least once a year. Malfunctioning can lead to severe consequences like fire outbreaks or gas leaks.

Checking your safety switch will help run everything smoothly and give you peace of mind that it’s working. Don’t wait until it’s too late! Check your safety switch today to avoid costly repairs or replacing your system.

Also, double-check the gas valve and line – a faulty furnace can be a horror movie scene!

Checking the Gas Valve and Line

The gas valve and line are very important to your furnace. It is essential to make sure they are functioning correctly for your safety and the efficiency of your system.

To begin, turn off the electrical power supply of the furnace and wait a few minutes. Here is a 5-step guide to check the gas valve and line:

  1. Look at the Gas Line: See if there are any leaks or damage in the gas line connected to the furnace. If you see any damage or think there is a leak, turn off the gas supply right away.
  2. Test Gas Valve: Turn on the furnace and see if it lights up. Remove the cover of the gas valve. Then, use a multimeter testing device to make sure voltage is flowing into the gas valve.
  3. Clean Gas Valve: Use an air compressor or a soft-bristled brush to get rid of dirt, dust, or debris inside the gas valve.
  4. Check Heat Exchanger: Look for signs of corrosion and holes that may be potential fire hazards. Also, check if there is soot inside. This could mean incomplete combustion from lack of oxygen.
  5. Testing Carbon Monoxide Detector: Test the carbon monoxide detectors nearby. Make sure they work all the time. Carbon monoxide poisoning can be deadly.

It is important to call a professional HVAC specialist if you notice any damages. Fixing small problems early can prevent disasters like fire-related accidents or Carbon Monoxide buildup.

Remember routine maintenance prevents future expenses, gives better performance from your furnace, and prevents future emergencies. Don’t take chances with seasonal maintenance. Hire professionals for regular checkups and cleaning. Check your ducts and vents too. You don’t want to breathe in mold and dust bunnies.

Inspecting Ducts and Vents

Before starting, switch off your HVAC system and close all opened windows and doors. Check the supply and return registers for obstructions like dirt or debris. Use a flashlight to check for any damage or leaks in the ductwork in crawl spaces or attics. Inspect for mold inside the ducts by removing a register cover. Contact professionals if you detect it. Verify the dampers work by turning the thermostat from ‘Fan’ to ‘Auto.’ Listen out for movement from the dampers that control airflow to different rooms.

Check for blockages preventing heated air from streaming through the vent work, and signs of detachment or leaks which can bring external air into the device. Address necessary repairs such as loose connectors, rusty vents, or changes in sound levels.

Regularly verify airflow resistance and connection points. Small issues can become serious problems if undetected. Ancient Rome used funnel-like pipes called hypocausts to heat homes with firewood. Inspect Ducts and Vents to keep your home safe. Be prepared for a hefty repair bill if the heat exchanger is cracked.

Inspecting Heat Exchanger

Inspecting the heat exchanger in your furnace is essential to keeping it running smoothly. Here’s what you need to do:

Steps to inspect the heat exchanger:

  1. Turn off the power source & gas supply
  2. Open up the furnace cabinet
  3. Locate the heat exchanger
  4. Check for cracks, holes & corrosion

Take extra caution when checking for any signs of damage, even minor ones, as they can lead to carbon monoxide leaks, fires, or other hazards. Carry out this inspection yearly and your furnace will be safe and efficient all year round.

The US Consumer Product Safety Commission reports that an approximately average of 170 people died from non-fire-related carbon monoxide poisoning each year between 2005 and 2017.

So, before you get to inspect, make sure to switch off the power – unless you want to witness a spark show that would be more explosive than fireworks.

Inspecting Ignition and Power Switches

Examining your furnace? Check the ignition and power switches. It may seem daunting, but with our guide, you can do it like a pro.

Locate the power switch near the burner. Make sure it’s in the ‘on’ position. Check all wiring for any loose connections or damage.

The ignition switch is typically found near the access panel. Turn off the furnace’s electrical supply at its main circuit breaker. Remove the access panel and inspect wires for corrosion or fraying.

Replace access panels and turn the system back on. Ensure it starts up correctly.

For safety, check the circuit breaker and fuse. 500 fatalities in America are caused by faulty heating equipment (National Fire Protection Association). Don’t let sparks fly in your face!

Inspecting the Circuit Breaker and Fuse

For smooth furnace operation, inspect the circuit breaker and fuse to prevent electric overloads. Here’s a 6-step guide:

  1. Switch off the power supply at the main circuit breaker.
  2. Find the furnace panel – usually near the furnace.
  3. See if there are any burn marks or broken fuses.
  4. Replace any damaged fuses.
  5. Press on the circuit breaker if it’s loose.
  6. Restore power to check if everything is working.

Be sure to wear protection when inspecting – it could be dangerous! And remember safety precautions like switching off appliances when replacing fuses. It may take some time, but it’s worth it to avoid big problems later on.

I had a client who skipped this process. They had to do another repair after three months – a little effort saves you money and hassle! Listen for any strange sounds coming from your furnace – unless you like being scared out of your wits!

Looking for Any Unusual Sounds or Noises

When inspecting your furnace, it’s key to keep an ear out for any odd noises. Here’s what to look out for:

  • A rattling sound could mean loose parts.
  • A high-pitched whine could signal slipping belts or bearings.
  • Constant clicking may point to an electrical issue.
  • Banging may be due to an ignition assembly problem.

Also, some soft creaking and popping may just come from normal wear and tear. If anything sounds off, it’s best to contact a pro.

Unusual noises such as screeching or grinding can be warning signs too. Investigate any strange sounds asap.

I once had a client who heard peculiar noises coming from their furnace in winter. I found that ducts had come loose, leading to heat loss and lower efficiency. By fixing the ducts quickly, we kept energy bills low and comfort high.

Time to check your furnace – it may be messier than a teen’s bedroom!

Inspecting for Dirt and Debris Build-up

Maintaining your furnace is essential for it to work properly. To check for dirt and debris, here are six easy steps:

  1. Switch off the furnace.
  2. Gently remove the cover.
  3. Use a soft-bristled brush to clean the inside.
  4. Look at the blower motor blades and wheel for dirt.
  5. Check the air filter – replace it if dirty or clogged.
  6. When done, turn on the power.

Performing regular checks can save you time and money. HVAC technicians suggest a yearly maintenance check-up. Otherwise, you could be faced with more problems in the future.

Furnace maintenance is important – don’t ignore it or you may regret it later.

Common Furnace Problems That Require Professional Repair

To identify and address common furnace issues, you need to look for obvious signs such as gas leaks, reduced airflow, or strange noises. If your furnace fails to ignite, there may be problems with the ignition system or flame sensor. Clogged or dirty air filters can cause heat exchanger problems and blower motor failure, leading to subpar airflow and reduced heating efficiency. In some cases, a malfunctioning thermostat might cause the heating system to fail. It is necessary to handle furnace repair or maintenance by a licensed technician.

Gas Leaks

A gas leak in your furnace is serious! It happens when the fuel line, furnace valve, or heat exchanger gets damaged. This can lead to dangerous consequences, including explosions, fires, or carbon monoxide poisoning.

Look out for signs such as a strong sulfur-like smell or yellow flames. If you see them, turn off your furnace and call a certified technician.

Regular maintenance and inspections help prevent future issues. You can also install carbon monoxide detectors in key areas for extra security.

Be sure to act quickly and safely. Identify warning signs early, get checkups, and use detectors for peace of mind.

Problems with Ignition

If your furnace is misbehaving, it’s best to call in an expert. Ignition issues can lead to inefficient heating or even safety risks. Common ignition-related issues include:

  • A dirty or malfunctioning pilot light, which can stop the main burners from igniting.
  • A faulty thermocouple, which stops gas from flowing to the burners.
  • A defective ignition switch, which prevents the spark from igniting the burners.
  • Clogged burner assembly, blocking proper ignition and causing dangerous gas build-ups.

Be warned: DIY fixes can be dangerous and may void warranties on newer furnaces. Hire an experienced technician for a safe and successful repair. Don’t forget: different furnaces need different knowledge for repairs. Seek out technicians who know your specific type of furnace. Horrifyingly, many fires and explosions have been linked to faulty furnaces. In 1913, a family died in a NYC apartment explosion because of a broken furnace. This is a grim reminder of why it’s important to get maintenance and repair done quickly. Don’t let your furnace become a fire hazard – call a professional for airflow issues.

Issues with Airflow

Your furnace might be facing issues with airflow. Causes can range from blockages, and damaged ducts, to a defective blower fan. Ignoring these may cause malfunction and a higher energy bill.

  • Blocked air filters can reduce airflow and increase motor workload.
  • Bent or crushed ducts can lead to uneven heating.
  • A faulty blower fan leads to energy wastage.
  • A blocked return vent causes negative pressure.
  • Leaky ductwork leads to energy loss.

If unnoticed, issues with airflow can cause irreversible damage and expensive repairs. Moreover, continuous use of a faulty component can cause cracks and leaks in the heat exchanger. If you face temperature inconsistencies or weird noises, call an expert for an inspection right away.

Don’t wait ’til it’s too late. Maintain your furnace regularly with HVAC contractors to save energy and money! When your filter is gross, call the pros!

Dirty or Clogged Filters

A clogged or dirty filter is a common issue that needs professional repair. Air passes through the filter and collects dust and debris. This can block airflow and reduce efficiency.

6 key points to keep in mind:

  • Clogged filters can make your furnace work harder, meaning higher energy bills.
  • If ignored, it can cause overheating and damage your furnace.
  • Check and replace your filters every 30-60 days.
  • If you’re not sure, contact a professional.
  • HEPA filters are good for pet owners.
  • Regular maintenance can prevent costly repairs.

Don’t wait until your furnace breaks down – schedule maintenance with a technician soon. Staying on top of basic upkeep can save you headaches and expenses in the future. Invest now for confidence in your heating system!

Malfunctioning Thermostat

Are you feeling cold, despite adjusting the thermostat? This is a common issue caused by a malfunctioning thermostat. It’s best to hire a pro for repairs — DIY can lead to costly fixes in the future.

Faulty thermostats can cause furnaces to turn on and off frequently – known as short cycling. This wastes energy and puts stress on your furnace. If the thermostat is misreading temperature or has electrical issues, your furnace may not reach the desired temp.

Replacing batteries or resetting breakers may help, but only temporarily. If it doesn’t work, it’s time to call an HVAC technician. I experienced this once — my wiring had moisture buildup, so a pro came in and fixed it up.

If your furnace’s blower motor is making strange noises, it’s not haunted! But it does need a professional to sort out the problem.

Problems with the Blower Motor

A blower motor is key to your furnace working. If it malfunctions, it affects your home’s heating. Signs of a bad motor are poor airflow, strange noises, and temperature changes.

If you spot these, call a pro. Blower motors are complex and need expertise to be fixed or replaced. Technicians will check the motor and see what needs doing.

Various things may cause the motor to act up, e.g. dust, damaged capacitors, or electrical faults. Professionals are needed for a correct diagnosis.

Don’t wait until your furnace fails! Save time and money by getting an expert to do maintenance checks. They can spot early damage, especially in crucial parts like the blower motor.

So, if something’s wrong with your furnace, like noises or hot spots, get it seen quickly by a technician or HVAC specialist. Annual maintenance will help your equipment last longer and stop costly repairs. If your heat exchanger is cracked, it’s a serious problem!

Issues with the Heat Exchanger

The heat exchanger of the furnace is the component that transfers heat from fuel to the air. Issues with this part can cause dangerous carbon monoxide fumes and inefficient heating. A professional should be consulted for any issues. Even small damages can put lives in jeopardy.

Neglecting the maintenance of the heat exchanger can be fatal, especially in modern furnaces. A cracked exchange can let in poisonous gases like carbon monoxide – an invisible killer. Thus, it is essential to have an HVAC technician check for cracks during regular maintenance visits or if you smell something suspicious.

With extended use and aging, heat exchangers suffer thermal fatigue and corrosion, leading to cracks or holes. This fills spaces that should have hot gases flowing, resulting in poor combustion. Clogged airflow passages from air filters will also increase thermal stress and cause surface warping, which can create cracks in large components such as flues or manifolds.

Don’t risk danger by delaying repairs to the broken heat exchanger- book an appointment now! Qualified HVAC technicians are available 24/7, so there’s no excuse! Book before it’s too late! Procrastinating furnace maintenance is like playing Russian roulette with your heating system – except the bullet is a freezing winter night.


Regularly checking your furnace is essential to ensure its efficiency and safety. Failing to do this can lead to costly energy bills, breakdowns, or even gas leaks. So, take fast action if you notice any issues with your furnace. Prevention is better than cure. Take action if you hear strange sounds or notice something odd from your furnace. By following these steps, you can keep your furnace working efficiently and reduce energy consumption, while keeping your home safe from hazards.