How To Fix Furnace Ignitor? A Comprehensive Guide

How To Fix Furnace Ignitor: An Overview

To understand furnace ignitor problems with their solutions, let’s go over the importance of the ignitor in the heating system. There are common ignitor problems you need to know, and it is crucial to identify them. In this section, we will explain the importance of addressing ignitor problems and the potential consequences of ignoring them. Let’s take a closer look at each sub-section to get a better understanding of furnace ignitor issues.

How To Fix Furnace Ignitor

The Importance of the Ignitor in the Heating System

A homeowner in Alaska woke up one cold winter night to find his furnace had stopped working. He quickly realized the heat was gone and outside temperatures were near zero degrees Fahrenheit! He checked the thermostat batteries and replaced the filters, but that didn’t help. It was his furnace’s outdated hot surface igniter (HSI)!

He called for emergency assistance and got the furnace running again within the hour. Now, let’s get detective and uncover the mysteries of a furnace ignitor!

Common problems include a clicking noise and burners failing to ignite. Knowing what system your furnace operates on can help troubleshoot problems efficiently and save time and money on repairs. An HSI uses electric current to produce heat through resistance, while an intermittent pilot (IP) system uses sparks to ignite gas burners.

Without an efficient and functioning ignitor, you may experience inadequate heating or no heating at all. Ignitors usually last for several years before needing replacement, unless misused or damaged due to mechanical failure.

Identifying Common Ignitor Problems

Furnace ignitor issues? Pay attention! Here are 3 common ones:

  1. Faulty Wiring: Inspect wires for wear and burn marks.
  2. Dust Build-Up: Clean the ignitor regularly to prevent this.
  3. Damaged Ignitor: Check for visible damage, and replace if necessary.

Plus, check for debris and corrosion on flame sensors and burners.

Before attempting fixes, turn off furnace power for safety. Don’t get left in the cold – paying attention to ignitor problems is key.

Importance of Addressing Ignitor Problems

Furnace ignitor problems can lead to big inconveniences. It’s essential to understand how they occur and their root cause. This can help take steps to prevent them from happening again.

Malfunctioning furnace ignitors create a stressful situation when it needs urgent repair in extreme weather conditions. Having a basic understanding of troubleshooting can help address the issue quickly.

It is important to note that repairs should only be done by experienced technicians. Furnaces are among the most dangerous appliances due to carbon monoxide poisoning risk. So, time to put on your detective hat and get to the bottom of these finicky furnace ignitors!

Troubleshooting Furnace Ignitor Problems

To troubleshoot furnace ignitor problems with the sub-sections ‘Check for Power Supply and Circuit Breakers’, ‘Inspect and Clean the Ignitor Sensor’, ‘Check Pilot Light and Gas Supply’, and ‘Check for Limit Switch and Thermostat Issues’ as the solution, you need to follow a step-by-step process. First, you need to diagnose the problem, then inspect and clean the ignitor sensor, and move on to check the pilot light and gas supply. Finally, examine the limit switch and thermostat issues to ensure your heating system is working efficiently and safely.

Check for the Power Supply and Circuit Breakers of the Furnace

When inspecting furnace ignitor issues, a key step is to examine the power supply and circuit breakers. Without the right power supply, the ignitor won’t work which leads to no or uneven heating in your home. Follow these 5 steps to inspect the power supply and circuit breakers:

  1. Switch off the furnace.
  2. Find your electric panel.
  3. Gently open the panel door and search for the “furnace” or “heating” breaker.
  4. If it’s tripped, turn it off and then on again. Make sure it’s fully on if it isn’t.
  5. Go back to the furnace and switch it on.

Remember, some furnaces come with an extra switch inside or near them that you should also switch on. Check it out while you’re there.

Troubleshooting may not be enough if the wiring is damaged or loose. An electrician may be needed. Before calling one, though, ensure your thermostat is correctly set.

If none of these fixes work – no worries! A technician can help. It’s safer than trying to diagnose the problem without knowing what could go wrong. 

Don’t let a grimy ignitor sensor block your heating – give it a clean and watch the flames rejoice!

Inspect and Clean the Ignitor Sensor of the Furnace

Troubleshoot furnace ignitor problems by inspecting and cleaning the ignitor sensor! Neglecting this can cause your furnace to malfunction or not turn on. Here’s how:

  1. Power off – Avoid any accidents by turning off the power supply before working.
  2. Find the Sensor – It’s a small metal rod located near the burner assembly.
  3. Remove – Use a wrench to take it out.
  4. Inspect – Look for any cracks or damages on the sensor tip.
  5. Clean – Gently scrub the sensor tip with sandpaper or steel wool.
  6. Put back – Secure it tightly before powering up the furnace again.

Remember, abrasive cleaners or rough handling can cause damage and costly repairs. Opt for gentle cleaning only when needed.

Schedule annual maintenance checks by a professional technician to inspect all parts of your heating unit including sensors. This is important for safe operation during colder months when furnaces work extra hard!

Don’t call a repairman just yet – make sure your furnace isn’t just having pilot light issues.

Check the Pilot Light and Gas Supply of the Furnace

Maintaining the pilot light and gas supply is a must for keeping your furnace ignition working properly. If these are interrupted, your furnace may not function. Here’s a guide for troubleshooting:

  1. Find the pilot light and gas valve.
  2. Check if the gas valve is on.
  3. Turn off the gas valve.
  4. Wait 5 minutes before relighting, allowing any gas to dissipate.
  5. Relight using manufacturer instructions.
  6. Turn the gas valve back on and test your furnace.

Remember, different furnaces have different lighting processes, so refer to the instructions. The bubble solution is better for detecting gas leaks than smell alone. 

Moreover, HVAC contractors say that replacing furnaces older than fifteen years can save you repair appointments and utility costs. Lastly, make sure the limit switch and thermostat are not an issue.

Check for Limit Switch and Thermostat Issues in the Furnace

Are you having trouble getting your furnace to ignite? Follow these 6 simple steps to diagnose the problem.

  1. Check the air filter. A dirty filter can cause overheating and trip the high limit switch, turning off your furnace.
  2. Look at your thermostat. Is it set correctly? Does it have fresh batteries? Try resetting it if the problem persists.
  3. Examine your wiring for broken wires or burned-out components. Also, check for corrosion or rust.
  4. Test the limit switch. Shut off the power to your furnace and remove its side panel. Use a multimeter to check for continuity between its terminals. No continuity means a bad switch.
  5. Investigate the pressure switch. It should shut off if it senses an issue with the airflow in your HVAC system.
  6. Make sure the flame sensors are clean. Dirty or damaged sensors can lead to ignition problems.

If all else fails, call a professional technician to help troubleshoot specific issues. Keep in mind that different furnaces have different components. These steps will cover most scenarios, but they don’t apply to every case.

Regular maintenance of your HVAC system is key. Otherwise, you might find yourself in a fix. The family I told you about had to spend a lot of money to get their furnace running again after their thermostat battery died. 

So don’t be caught off guard – maintain your HVAC system!

Fixing Furnace Ignitor Problems Of The Furnace

To fix furnace ignitor problems with different solutions, you need to know the issue in your heating system that you could be facing. This section focuses on fixing faults in furnace ignitors. The sub-sections include replacing the ignitor, replacing the ignition control board, replacing the hot surface ignitor (HSI), cleaning and maintaining the furnace and components, and knowing when to call a professional HVAC technician.

Replacing the Ignitor of the Furnace

When your furnace ignitor is malfunctioning, it can cause many problems. Replacing the Ignitor is a must. Here are six steps to help you do it:

  1. Switch off the breaker to turn off the power supply.
  2. Remove the cover panel from the furnace to get access to the burner assembly.
  3. Use a screwdriver to loosen and detach the wiring module on top of the burner control box.
  4. Take out the screws that attach the old ignitor to your furnace and replace it with a new one.
  5. Carefully reattach all screws and refit the module into its original position. Tighten with your screwdriver.
  6. Finally, replace your furnace’s cover panel and switch on the power supply.

Be aware that different ignitors require specific procedures for removal and replacement. Broken parts indicate underlying operational issues. Ignoring them can lead to more damage and impact productivity.

I once had an experience where my furnace ignitor broke down in winter during a big blizzard. I was glad I knew how to fix it quickly. So, I would recommend anyone experiencing similar problems try doing it themselves first before calling for professional help.

Different Types of Ignitors of Furnace

Ignitors are used to ignite the gas in the furnaces and start the heating process. Here are the common types of furnace igniters: Silicon Carbide (Flat or Spiral), Hot Surface Igniter (HSI), and Direct Spark Ignition (DSI).

  • The cost range for each type is $20-$100, $30-$150, and $50-$200 respectively. Choose an igniter that best suits your furnace’s needs. 
  • Inspect the igniter and have it professionally cleaned every two years. Dust particles can hinder performance, so check for any buildup around the ignitor.
  • For long-lasting performance, avoid switching the thermostat on and off continually. 
  • Invest in a programmable thermostat with temperature presets. This will help maintain furnace health and keep you warm during cold winter days.

Time to ignite your inner DIY expert and fix that furnace!

Steps for Replacing Ignitors in Furnace

When it comes to furnace ignitor problems, replacing the ignitor may be the answer. Here’s how to do it:

  1. Turn off power.
  2. Disconnect the old ignitor.
  3. Connect the new ignitor with the wiring harness.
  4. Secure mounting bracket.
  5. Turn on the furnace power and check it’s working.

Replacement parts must be compatible with your furnace model. User manuals or professional advice can help you select the right one. You don’t want to be left in the cold! Regular maintenance is key to a safe and comfortable home. Clean filters weekly and get smart HVAC services for optimal performance. 

Without a reliable ignition control board, your furnace is all but useless – like trying to heat your house with a toaster!

Replacing the Ignition Control Board of the Furnace

Time to replace the ignition control board for furnace ignitor problems. Here’s a 5-step guide:

  1. Turn off the power.
  2. Disconnect wires from the old board.
  3. Remove screws.
  4. Secure the new board with screws.
  5. Reconnect wires to a new board, matching colors, and terminals.

Check the manufacturer’s instructions for furnace-specific info. Wear protective gear like gloves and goggles when replacing the board. Alice Parker patented the first automatic furnace in 1919.

Steps to Replace Control Board of the Furnace

Furnace ignitor problems? Time to replace the control board! Here’s what you need to do:

  1. Shut off the power supply. Safety first!
  2. Unscrew/unbolt the old control board.
  3. Carefully install the new one, securing any screws/bolts.

Don’t forget to ensure the new board is compatible with your furnace model. And it’s always good to have some background knowledge. Did you know that modern furnaces are more reliable and energy-efficient due to electronic controls replacing traditional mechanical components?

So, let’s put the old ignitor out to pasture and welcome in a top-of-the-line replacement!

Replacing Hot Surface Ignitor (HSI)

Replacing the Hot Surface Ignitor (HSI) in your furnace can be a breeze with the right instructions. Here’s a four-step guide to making the job easier:

  1. Before you start, turn off the power to your furnace by flipping the breaker switch or unplugging it from the outlet.
  2. Look up the HSI location in the manufacturer’s manual, then unscrew it from its mounting bracket.
  3. Gently pull apart the wires attached to the HSI and remove the old ones.
  4. Install the new HSI by securing it onto the mounting bracket and reattaching the wires.

Remember that different models may require different types of igniters. Refer to your furnace’s manual before buying a new one, to check compatibility.

Handle the electrical components of the HSI with care. Touching them with bare hands can cause damage, resulting in costly repairs or replacement. 

Get ready to spark up your knowledge and ignite your HSI skills!

Understanding HSI and Its Working in the Furnace

The Hot Surface Ignitor (HSI) is an essential part of a furnace system. It starts the gas that warms up your home in cold weather. Knowing how an HSI works can help when troubleshooting furnace problems.

Check out this table for an overview of HSI characteristics:

CompositionSilicon nitride or silicon carbide
Resistance40-120 ohms at room temperature
Power consumption80-100 watts
Operating temperatureUp to 2400 degrees Fahrenheit
Service lifeAnnually inspected & replaced every 3-5 years

It’s wise to get a professional to inspect HSIs yearly. This prevents costly repairs. If your HSI isn’t working, the problem could be with the electrical, air quality, or moisture build-up.

Try these steps to troubleshoot:

  1. Clean the HSI if needed.
  2. Disconnect the power before touching the equipment.
  3. Check the wiring connections for proper grounding.

Doing these small checks can save you thousands of dollars in operating expenses. And if it’s time to replace the HSI, follow these DIY steps.

Steps for Replacing HSI in the Furnace

Fixing furnace ignitor problems? Replace the HSI! Here’s a five-step guide:

  1. Turn off the power and gas valves.
  2. Locate the HSI, usually near the burner assembly.
  3. Gently remove the old HSI.
  4. Carefully install the new one.
  5. Switch on the power and gas valves. Test it!

For best results, hire an experienced technician and use genuine parts compatible with your furnace model. Improper installation and materials can be unsuitable for some furnaces. 

Find an industry-trained expert through the search engine. Clean and maintain your furnace to avoid a meltdown.

Cleaning and Maintaining the Furnace and Components

Cleaning and maintaining your furnace is a must for efficient performance. Here are some ways to keep it running right:

  • Swap out air filters regularly to stop dust and dirt from piling up in the furnace blower motor.
  • Check the ductwork for leaks that reduce airflow and sap efficiency.
  • Look over burners and heat exchangers for cracks, rust, or disintegration. If you spot any of these, call a pro.
  • Keep vents free of dust and other obstructions to avoid air flow restriction and system overload.

Also, make sure your gas lines and other safety equipment are in tip-top shape. Following these steps will boost efficiency, cut energy costs, and prevent expensive breakdowns.

Finally, don’t forget to get your furnace inspected yearly. This doesn’t just save money – it could alert you to a problem before winter hits and leaves you freezing. 

Upgrade your air filter and give your lungs a breath of fresh air!

Air Filter Replacement in the Furnace

Replacing the air filter in your furnace is a must. Failing to do so can lead to serious issues.

  • Replacing filters regularly stops dirt and dust from building up, which obstructs airflow.
  • It also impacts the air quality inside your home.
  • Replace disposable filters every 3 months, or follow the manufacturer’s instructions. Clean permanent filters at least once a month.

Be sure to pick the correct filter size and type, to avoid damaging your system or making it ineffective. Upgrade to a higher efficiency filter with a MERV rating between 11-13 for better air quality. 

Burners and Pan inspections? That’s how you fix furnace ignitor problems.

Inspect Burners and Pans in the Furnace

Burners and Pans are key components of a furnace, especially when troubleshooting furnace ignition problems. Ensure your furnace is running smoothly by inspecting them regularly. Here’s how:

  1. Turn off the power supply before you begin.
  2. Remove the burners and check for obstructions in the gas flow. Also, look for any rust or cracks.
  3. Check the pan for any build-up of debris or moisture.

It’s important to frequently inspect both parts – they are linked and influence a furnace’s performance, helping prevent system failure from clogged burners or dirty pans. Wear safety gear like goggles and gloves when performing furnace maintenance to avoid gas leaks. 

Time to put on your detective hat, get cleaning, and solve that furnace ignition puzzle!

Clean and Check Wires and Components of the Furnace

  1. Power down your furnace before checking its wires and components. 
  2. Inspect for cracks or frayed edges. Swap out any damaged wires. 
  3. Use a brush or vacuum cleaner to clean the blower motor blades and assembly. 
  4. Scrub the flame sensor with steel wool, being careful not to damage its porcelain base. 
  5. Check the cushions around keypads and secure any loose connections. 
  6. After that, reconnect everything and make sure it’s secure.

Regular cleaning can prevent wear and tear which may cause long-term issues. Plus, you’ll stay toasty for winter! 

The U.S. Department of Energy 75% of US households use natural gas heating systems each year. Also, if your furnace is sounding like a chainsaw massacre, it’s time to call a professional.

When to Call a Professional HVAC Technician for Fixing Furnace Ignitor

Furnace ignitor issues can be tricky. If you’ve tried troubleshooting but the problem persists, calling a qualified HVAC technician is necessary. 

Ignitors are delicate electrical parts and require professional installation or repair to avoid further harm or injury. When you get a licensed technician, you’re assured of protection and a precise inspection and diagnosis of the real issue.

DIY solutions may appear to fix the problem temporarily, but they won’t resolve the root cause. Overlooking problems could lead to expensive repairs in the future. Also, DIY attempts on your furnace can nullify the warranty from manufacturers.

If you have a faulty furnace ignition system, don’t worry. Get professional help from a reliable technician right away. Postponing can cause additional issues.

Did you know? HomeAdvisor reported that furnace repair costs range from $130 to $450 on average in the US. 

It’s important to prioritize safety – unless you’re dealing with a furnace ignition issue, then getting fixed should come first.

Safety Precautions and Measures for Fixing Furnace Ignitor Issues

To ensure the safety of yourself and your home while fixing furnace ignitor problems, you need to take some safety precautions and measures. In this section, we will discuss the potential safety issues that come with working on your gas furnace, including the importance of gas valves and pilot lights. We will also cover the importance of regular maintenance and inspections, as well as provide tips for the safe handling of furnace components.

The Importance of Gas Valves and Pilot Lights in Furnace

Gas valves and pilot lights are essential for gas-powered appliances. They make sure it’s safe to use and prevent accidents. The gas valve controls the flow of gas to the burner which heats the appliance. The pilot light ignites the gas when needed.

Having regular maintenance checks by a qualified technician can help find issues with the gas valve or pilot light. This reduces the risk of fires, explosions, or carbon monoxide poisoning. Not doing this can lead to explosions.

It’s important to prevent accidents. Install carbon monoxide detectors near the appliances and keep flammable objects away from them. Neglecting safety puts lives at risk.

Being proactive is key. Have regular maintenance and inspections. It’s not fun but it’s necessary to avoid a painful disaster.

The Importance of Regular Maintenance and Inspections of Furnace Ignitor

Regular maintenance and inspections are a must for safety. Without them, potential hazards can go undetected, risking people and property.

Inspections should be done to locate any issues before they become serious. This includes examining equipment for wear and tear, looking for damage or deterioration in the building, and checking for any electrical or mechanical issues.

Maintenance ensures any problems spotted during inspections are promptly fixed. Regular upkeep can also prevent breakdowns and boost efficiency, making it safer by stopping emergencies.

I remember a manufacturing plant that didn’t do regular maintenance on their equipment. The result was a disaster, causing a long plant shutdown. If regular maintenance had been done, this could have been avoided, saving the facility from costly repairs and downtime. 

Handle furnace components with care, unless you enjoy the smell of burnt hair and regret.

Tips for Safe Handling of Furnace Components

  • When handling furnace components such as filters, ducts, and registers, always use gloves and eye protection
  • Before working on ducts or registers, make sure to turn off the power supply to the furnace
  • Keep several inches of space around the furnace for proper airflow. Mishandling can cause injuries and damage to your HVAC system.
  • Never attempt to repair or inspect a gas pipe connected to a furnace unless you are a licensed professional. It can lead to fatal risks and is best left to the experts.
  • Stay safe when dealing with furnace components. Follow the safety precautions and call an expert if ever unsure about HVAC maintenance. 

Don’t take unnecessary risks when it comes to your comfort. Remember, it’s better to be safe than six feet under!


To wrap things up when it comes to fixing furnace ignitor problems, it’s important to summarize the main points we just discussed. Now that you’re aware of the various issues that commonly affect furnace ignitors and the troubleshooting step involved, it’s crucial that you understand the importance of regular maintenance and prompt repairs. Lastly, we’ll dive into the role of HVAC companies and professionals so that you know when it’s best to seek expert help. Regular maintenance and repairs are essential for keeping machines, tools, and equipment functioning optimally. To sum up, hiring the right HVAC professional or company is key to a safe and well-functioning system. Trusting experts brings economic and environmental benefits.