Is your furnace not turning on and you suspect your pilot light has gone out? Relighting a furnace pilot light is a common DIY task, but safety should always be your top priority. This guide will walk you through the process step-by-step, keeping you and your home safe.
Before we dive into the process, understand that if your furnace is over 20 years old or hasn't been serviced recently, it's wise to call a professional. Today, we'll focus on modern furnaces. If you're uncomfortable at any point, don't hesitate to call a technician.
Preparation and Safety
Before you start, ensure the furnace is off. Locate the power switch on the furnace and turn it to the 'off' position. Also, find and turn off the gas valve. This valve is usually a handle near the floor, attached to the gas pipe connected to your furnace. Remember, never attempt to relight the pilot light if you smell gas.
Gather your tools. You'll need a flashlight, a screwdriver (if your furnace has a cover), and maybe some gloves. Finally, always have your furnace manual handy, as models can vary.
Locating the Pilot Light
Your furnace's pilot light is usually located at the bottom, near the burner chamber. It's a small, blue flame. If your furnace has a front cover, remove it using a screwdriver. If it's a side-access panel, remove that.
Once you've accessed the combustion chamber, look for the pilot light. If it's out, you'll see the thermocouple, a metal rod, but no flame. Be prepared for the chamber to be dusty, as it's not typically accessed often.
Relighting the Pilot Light
First, locate the reset button or switch near the pilot light. This is usually a small button or lever. Press and hold it. While holding it, turn the gas valve to the 'on' position. Continue to hold the reset button until the pilot light is lit. This could take up to a minute.
Once the pilot light is lit, continue to hold the reset button for another 30-60 seconds. This primes the thermocouple. Release the button. If the flame afetrs off, you might have a faulty thermocouple. If this is the case, it's time to call a professional.
What if the Pilot Light Keeps Going Out?
If the pilot light extinguishes repeatedly, it might be due to a draft or crosswind entering the furnace. Ensure your furnace is properly ventilated and that there are no sealed openings where cold air could enter.
Alternatively, it could be a sign of a clogged pilot light. This often happens due to dirt and dust buildup. Cleaning the burner and pilot from time to time can prevent this from happening. However, if you suspect clogging, it's best to call a professional, as cleaning involves disassembling parts that could pose safety risks if not done correctly.
Frequency of Cleaning Your Furnace
For optimal performance and longevity, get your furnace professionally serviced annually. Regular cleaning and maintenance can prevent issues and keep your furnace running efficiently.
Between professional servicings, you can perform simple maintenance tasks like replacing air filters every 30-90 days, depending on your specific furnace and the air quality in your home. Keep your area around the furnace clear, and ensure nothing blocks the airflow.
In colder climates, consider keeping your furnace on a low setting even in the summer. This helps prevents rust and keeps moving parts lubricated. However, always follow the manufacturer's instructions for your specific furnace model.