The short answer: You can get away with running your AC without a filter for a short period of time. However, doing so for longer than 6-8 hours can hurt your system and decrease your home's indoor air quality.
The simple answer is: not for long. Ideally, your AC should never operate without a filter for more than 6-8 hours. Going beyond this can negatively affect both your system's health and your home's air quality.
As mentioned previously, running your air conditioner without a filter can lead to severe problems. It could lead to decreased comfort and permanent damage to your HVAC system, which may result in hefty repair bills.
Operating your engine without the filter exposes it to dirt, debris, and contaminants that can lead to premature wear and a decrease in overall performance. Over time, repeated testing without the filter could result in greater engine wear and a shorter lifespan for the engine.
Without a filter, indoor air contaminates are inhaled by you and your family or left to create a buildup in your furnace or ductwork. To piggyback off what we wrote above, if left unfiltered, indoor air contaminates can make a home inside your ductwork.
Any amount of time spent doing so can lead to permanent damage and the possibility of needing expensive repairs. With that said, one to two days of running without a filter may not result in damage depending on the current air quality and environment.
Motor and Compressor Malfunctions
Your filter should be stopping dirt, pet hair, and other particulates from ever reaching these parts of your system. When your filter fails to do this or isn't in place, the motor and compressor get dirty and eventually fail to work properly.
Decreased air quality is the most common problem when AC's are run without a filter. Dust will not settle down in a room with an AC running continuously without a filer. This will eventually lead to the clogging of the unit.
Is my AC not working because of the filter? Potentially, yes. While there are a whole host of issues that could cause problems with your air conditioning system, a dirty air filter should be the first thing to check if your central air conditioning unit isn't working as properly as it should.
They may be a small part of your home's HVAC system, but air filters are important. They help you protect your home's comfort and air quality. They capture airborne pollutants, improve your HVAC system's efficiency, and protect its components from damage.
A clogged air filter can cause more harm than good. During the day, your AC should cycle on and off, but a dirty air filter can make those cycles more frequent than they should be. Cycling is not only noisy, but it also wastes energy.
First, check your filters and coils for dirt and debris that may be impeding airflow. Once you've cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn't blow cold air, it could be that refrigerant levels are too low.
DON'T: Forget to Turn Off Your Air Conditioner Before Replacing the Filter. When changing the filter, make sure to turn off your AC completely. Don't just turn your thermostat down; disconnect the AC entirely before filter replacement.
Most manufacturers recommend changing basic fiberglass filters every 30 days. Higher-quality pleated filters should generally be changed every 90 days, though they can potentially last up to six months.
Don't run your AC with a wet filter. It can cause your AC to work too hard, which will run up your utility bill and cause extra wear and tear on the system. You could also spread moisture and mold throughout your house. Turn off the AC, remove the wet filter, and check for cracks or clogs.
Check to see if the thermostat is blocking the filter from going back in. If so, lift up on the plastic gently with a butter knife near the thermostat and slide the filter in.
This leads to a variety of issues for your HVAC system including system inefficiency, higher energy bills, inadequate air quality, and ultimately failure. If you haven't been swapping your air filters as frequently as you should, there's no time like the present to start practicing this crucial maintenance step.
What happens if your HVAC filter is dirty? A dirty HVAC filter restricts airflow, which can lead to poor system efficiency, increased energy costs, and wear and tear on the unit.
The short answer: You can get away with running your AC without a filter for a short period of time. However, doing so for longer than 6-8 hours can hurt your system and decrease your home's indoor air quality.
Without an air filter in place, the engine may also be sucking dirt and debris in at the same time. This can cause damage to internal engine parts, such as valves, pistons and cylinder walls. The result is excessive oil consumption, poor engine performance, and eventually engine failure.
As the system is working harder to get around clogged air filters, it can cause the entire system to overwork and eventually break. If this happens, you'll need to replace the entire system, which can cost anywhere from $4,000 to $12,000.
Air filters that are overdue for a change are a common cause of HVAC system failure. Over time, dirt builds up in the heating and AC filters, causing components such as the motor to go into overdrive, which may eventually overheat your unit.
If you let this happen for long enough, the filter could break, releasing all of the pollutants it has accumulated. The pollutants will then float freely though your HVAC system, your house, and eventually your lungs. This can lead to your home's air supply feeling stuffy and dirty, and you could get sick as a result.