Beatrice Lang
Lighting an electric start furnace can be a challenging task, especially for those unfamiliar with the process. While modern furnaces have phased out the traditional pilot light system in favor of more efficient electronic ignition systems, older models may still rely on pilot lights for operation. This article aims to provide a comprehensive guide on how to light an electric start furnace, covering both pilot light and electronic ignition methods. By understanding the differences between these ignition systems and the steps required to light them, homeowners can ensure their furnace is running safely and efficiently, providing warmth and comfort during the cold seasons.
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What You'll Learn
Check the thermostat and pilot light
If you're having trouble lighting an electric start furnace, the first step is to check the thermostat and pilot light. Here's a detailed guide to help you through the process:
Firstly, ensure that the thermostat is functioning correctly and has good batteries. The thermostat is the device that communicates with your furnace to turn it on, so it's crucial to verify its operation. Check the batteries and replace them if necessary. Also, confirm that the furnace's electricity and gas supplies are turned on.
Now, let's move on to checking the pilot light. The pilot light is a small blue flame located near the burners at the base of the furnace. Its purpose is to ignite the burners when the furnace needs to start. In older furnaces, the pilot light stays constantly lit, even when the furnace is not in use. However, modern furnaces often use electronic ignition systems, which are more energy-efficient and reliable.
If your furnace has a standing pilot light, it should remain lit. Occasionally, it may go out due to airflow or gas supply issues. If the pilot light is not burning, you will need to relight it. This process can be done by the homeowner, but if you feel uncomfortable, it is best to call a professional. You will require a long-stemmed lighter or match and a flashlight to relight the pilot.
It's important to address a faulty pilot light immediately. If the pilot light isn't lit, but the system is trying to heat up, there is a risk of releasing gas into your home, which can be dangerous. Modern furnaces usually have safety devices like flame sensors or thermocouples to detect a working flame and act as a cut-off switch if something is wrong.
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Resetting the electric ignition
Locate the Power Source
Find the electrical panel in your house and identify the switch that controls power to the furnace. This could be the main breaker switch or a dedicated on-off switch for the furnace. Turn off the power supply to the furnace by flipping the switch.
Check for Common Issues
Before resetting, it is important to identify and address any underlying issues with your furnace. Check the furnace filter and ensure it is clean and not clogged or dirty. A dirty air filter can restrict airflow and cause issues. If necessary, replace the filter before proceeding. Also, check for any other signs of damage or corrosion in the furnace and take note of them.
Reset the Furnace
Now, locate the reset button on your furnace. It is usually yellow or red and located near the blower motor, inside the blower compartment. If the button is popped up, press it down and hold it for about 30 seconds. Be cautious, as the housing may be hot.
Turn the Power Back On
After resetting, return the cover to the blower compartment. Then, turn the power back on by flipping the switch on the electrical panel.
Monitor the Furnace
Once the power is restored, wait for 30-45 minutes and monitor the furnace's behaviour. Listen for any unusual sounds and check if it is functioning properly. If the furnace shuts off again or continues to exhibit issues, seek the assistance of a professional furnace technician.
Remember, resetting your furnace is a simple troubleshooting step, but if the issue persists, it is important to identify and address the root cause to ensure safe and efficient operation.
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Lighting the pilot light
Older furnaces with pilot lights are more likely to have issues with the pilot light going out due to airflow or gas supply issues. To light the pilot light, first, locate the pilot light, which should be near the bottom of the furnace, near the burners at the base. It should have a switch that says "on," "off," and "pilot," as well as a reset button.
Turn the switch to the "off" position and wait at least five minutes to allow any remaining gas to dissipate. Then, turn the switch to "pilot" and hold down the reset button. Use a long lighter or a long match to light the furnace pilot light. Hold the flame close to the pilot light opening for 30 to 60 seconds until a small blue-green flame with a yellow tip appears. This indicates that the thermocouple is heating up properly.
Once the pilot light has a steady flame, you can release the reset button and turn the switch to the "on" position. Adjust the thermostat to your desired temperature. If the pilot light does not stay lit, repeat the process. If you are uncomfortable with relighting the pilot or have tried multiple times without success, it is best to call a professional.
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Troubleshooting a faulty ignitor
Identify the Problem
Firstly, you need to confirm if the ignitor is indeed faulty. Check for the most common signs of a faulty ignitor, such as:
- Lack of Ignition: The most obvious sign is that your furnace won't ignite when activated.
- Cold Air Output: Your furnace may be blowing air at the same temperature as the cold outside air, indicating that the ignitor isn't producing the required spark to heat the air.
- Visible Damage: Inspect the ignitor for any cracks, discolouration, or physical damage, as this could lead to insufficient heat production.
- Frequent Cycling: If your furnace is turning on and off more frequently than usual, it could be due to a faulty ignitor causing erratic performance.
- Breaker Tripping: A tripped furnace breaker is often associated with a faulty ignitor, and if it happens repeatedly, it could be detrimental to your electrical system.
Troubleshooting Steps
Once you've confirmed that the ignitor is faulty, here are some steps to address the issue:
- Clean Air Filters: Ensure your furnace air filters are clean and regularly replaced, as dirty filters can restrict airflow and impact the furnace's performance.
- Gas Line Valve: Check if the gas line valve is fully open. If it's off or partially closed, this could be the reason for the issue.
- Thermostat Settings: Verify that your thermostat is set to a temperature higher than the surroundings. Also, check if the thermostat has working batteries and that the furnace's electricity and gas supplies are on.
- Professional Inspection: If the above steps don't resolve the issue, it's best to call a heating repair professional. Issues with the ignitor can lead to gas leaks, carbon monoxide leaks, and other hazards, so expert knowledge is necessary for a safe and effective repair.
Remember, a faulty furnace ignitor is a common problem, and in most cases, you can replace the ignitor without replacing the entire furnace. However, taking preventive measures and regular maintenance can help you avoid such issues during the coldest days of the year.
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When to call a professional
While lighting a furnace with a pilot light is a simple process, it's important to know when to call a professional. If you're uncomfortable with relighting the pilot, it's best to seek professional help. Professionals should also be contacted if the pilot light doesn't stay lit after multiple attempts, as this could indicate a larger issue.
If you have an older furnace with a standing pilot light, it's important to note that these systems are less safe and reliable than modern electronic ignition systems. If your furnace was manufactured before 2010, it may be time to consider an upgrade for safety and efficiency.
In the case of gas furnace ignition issues, it's crucial to know when to call an HVAC professional. Regular maintenance can help prevent malfunctions and ensure the safe operation of gas appliances. If your pilot light won't stay lit or your heating system won't turn on, it's time to call for professional repair.
Additionally, if you've tried lighting the furnace pilot light multiple times without success, it's best to contact a certified technician. Gas can be extremely dangerous, and furnace repairs should not be attempted as a DIY project. If you detect a rotten egg or sulfur smell, do not relight the pilot light. Instead, evacuate your home immediately and call for professional assistance.
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Frequently asked questions
Most modern furnaces don't include standing pilot lights and instead use electronic ignitors to light the burners. Furnaces manufactured before 2010 typically have standing pilot lights.
First, locate the pilot light. Your furnace should have a switch that says "on," "off," and "pilot." It should also have another switch or button labelled "reset." Turn the switch off and wait at least five minutes for any remaining gas to dissipate. Then, turn the switch to "pilot" and hold down the reset button while using a long lighter to light the furnace pilot light. Once it has a flame, release the reset button.
Turn the electric ignition off and then push the reset button. Consult your owner's manual for specific information on resetting your model.
If you're uncomfortable lighting your furnace, it's best to call a professional.
