How to Replace the Filter on an Oil Furnace

Oil furnaces are an alternative to electric or gas systems. They can be used in outdoor or remote settings where utility hookups may not be available. As the oil burns, it creates residue and grime that can clog up the filter and hamper the furnace's performance. Check the filter every month when the furnace is being used. Replace it immediately if you see any buildup.

Things You'll Need

• New oil filter
• Screwdriver
• Old rags for cleanup

Instructions

1. Disconnect the power source from the furnace's blower and close the oil supply valve. If oil seeps into the system while you are working, it can create a huge mess.

2. Open the service panel to access the inside of the furnace. Unscrew the oil filter's housing from the furnace assembly. Pull out the old filter and use a screwdriver to pry off the gaskets. Clean off the housing and attach a new gasket and filter. Screw the housing back into the furnace unit.

3. Check the air filter while you are servicing your oil furnace. If the same vents supply the return air to both the furnace and air conditioner, you may need to replace the air filter again after the summer.

Tips & Warnings

• Perform any needed maintenance on your oil furnace in the springtime, after you are done using it for the year. This will get things ready for the next winter, and it is a better time to call a repairman if you discover a major problem.

• Dispose of the used oil filter in accordance with your city's environmental waste regulations. Oil should not be thrown in the trash can or allowed to leak into the local water supply.