To operate in peak condition, the home furnace must be provided with regular maintenance. This important job is not difficult and can prevent buildup of debris and dust, which can create a fire hazard. Clean the furnace twice per year so it will provide you with many years of use.
You will need:
Step 1: Shut off the breaker switch to turn off the power to the furnace. Remove the safety panel from the front of the furnace. If the furnace uses oil or gas, shut off the fuel supply and pilot light as a safety measure.
Step 2: Use the vacuum cleaner and hose attachment to vacuum the inside of the furnace. Be careful not to disturb the wiring. Remove any buildup of dust or grime using the toothbrush and then re-vacuum the area.
Step 3: Locate the blower assembly, using the manufacturer guide if necessary. Use the cotton swabs, toothpicks, and toothbrush to clean the blower assembly. Give the blower fins special attention when removing buildup from surfaces. Some furnaces have a blower cover that needs to be removed to get to the fan. Use the vacuum to clean any loose debris.
Step 4: Use the scrub brush (dry) to clean the vents.
Step 5: Remove the furnace filters and replace them if needed. A disposable filter should be replaced annually. Vacuum a permanent filter and remove buildup using the scrub brush. Vacuum again or use an air compressor to blow the dust.
Step 6: Reassemble the furnace, replacing safety covers and filters but not the front panel. Inspect the area for corrosion, loose connections, and wiring that is melted or worn. If everything seems fine, re-connect the power and fuel supplies and turn on the furnace.
Step 7: Let the furnace run for a few minutes. Identify any unusual smells or sounds. A crackling sound will temporarily be made by any dust that was disturbed. If burning oil, gas, or electrical wiring is smelled, immediately shut off the furnace, turn off the fuel supply, and contact a professional.