As your HVAC system gets older, it will eventually become less efficient. The components inside, like the filter, fan, evaporator, and condenser coils, can simply wear down as it gets used more. Thankfully, these things are easy to service, which can improve how efficient they are. One aspect you can service on your own is the blower compartments. Here are some tips for cleaning it.
Shut Down The Power
You should start by shutting down the power going to your furnace. If you have a gas furnace, turn off the pilot light as well. If the furnace doesn't have a main shut off switch, you'll need to turn it off at your circuit breaker. This will ensure that the unit is turned off while you're working on it, which will keep you safe.
Vacuum The Blower Main Compartment
With the power shut down, you can now start cleaning. The only tools you'll need is a vacuum that has a hose attachment and some wet rags. Start by removing the unit's air filter, which will clear the area for cleaning. Then use your vacuum to remove as much loose dirt and dust as possible inside the blower compartment. If your vacuum has a brush attachment on it, use that to loosen dirt that may be stuck on the surface. You'll want to get as much dust as possible off of the blades of the fan, and clean deep towards the rear of the blower compartment. Pay special attention to the vent that goes to your HVAC system's ductwork, since all air will pass through the vent.
Wipe Down The Inside
There will be dirt and dust inside your HVAC system's blower compartment that will be difficult to remove with your vacuum. It helps to use wet rags for wiping down the inside of the blower compartment. Be sure to wipe down the blower fan blades, the column the fan is attached to, as well as the area that holds the filter in place.
Replace The Air Filter
With the inside of the blower compartment as clean as possible, it is ready for a brand new air filter. If you are not sure what kind you have, take the old one to your local home improvement store and have them match it up with a brand new filter.
Turn On The Power
You are now ready to turn on the power and get the HVAC system running again. You'll have less dust in the air, making the air you breathe in more pure.
If you want a professional to do all of this for you, contact a local HVAC contractor for assistance.