Cleaning your furnace’s flame sensor is a crucial maintenance task that can greatly improve the efficiency and safety of your heating system. Our aim is to provide you with a helpful and informative guide on how to properly clean your furnace’s flame sensor.
For more on furnace flame sensors, you can read more here.
Why clean your furnace’s flame sensor?
Your furnace relies on a steady flame to heat your home. The flame sensor is responsible for detecting the presence of a flame and sending a signal to the control board to keep the gas valve open.
Over time, dirt, dust, and other debris can accumulate on the sensor, causing it to malfunction and potentially shut off your furnace, leaving you without heat during cold winter months. Regularly cleaning your flame sensor can prevent these issues and ensure your furnace is running efficiently.
What you will need
To properly clean your furnace’s flame sensor, you will need the following tools:
- Screwdriver
- Fine-grit sandpaper or emery cloth
- Soft-bristled brush
- Clean cloth
- Rubbing alcohol or electrical contact cleaner
Guide on cleaning your flame sensor
- Turn off your furnace: Before beginning furnace maintenance, shut off the power and gas supply to avoid any potential hazards.
- Find the flame sensor: It’s typically a small rod located around the burner assembly of your furnace.
- Take out the sensor: Using a screwdriver, carefully remove the flame sensor from its mounting bracket.
- Clean the sensor: Use a soft-bristled brush to gently remove any visible dirt or debris from the sensor. Then, use fine-grit sandpaper or emery cloth to lightly scrub the metal rod until it is smooth and shiny.
- Wipe off residue: Use a clean cloth to wipe off any residue or dust from the sensor.
- Clean the mounting bracket: While you have the flame sensor removed, take the opportunity to clean the mounting bracket as well. Use a soft-bristled brush and rubbing alcohol or electrical contact cleaner to get rid of any dirt or buildup.
- Put the sensor back in: Once everything is clean and dry, carefully reattach the flame sensor to its mounting bracket.
- Turn on the furnace: Return the power and gas supply to your furnace and turn it back on. Your flame sensor should now be clean and functioning properly.
When to clean your flame sensor
It’s important to clean your flame sensor once per year as part of your maintenance routine. But if you notice your furnace repeatedly shutting off or having trouble igniting, it may be a sign that the flame sensor needs to be cleaned. Keep an eye out for these warning signs and clean your sensor as needed.
Cleaning is an important part of maintenance
Cleaning your furnace’s flame sensor is an important maintenance task that can greatly improve the efficiency and safety of your heating system. By following this guide and regularly cleaning your sensor, you can ensure that your furnace runs smoothly and efficiently, keeping you warm during the cold winter months.
Remember to always turn off the power and gas supply before attempting any maintenance on your furnace, and contact a professional if you are unsure or uncomfortable performing these tasks yourself.
