The air conditioning condenser coil is located outdoors, so dirt and debris can cause many issues if not addressed on a frequent basis. If coils on the outdoor unit are dirty, the hot air sent through the unit will not be handled efficiently and your air conditioning unit will have to work much harder.
Cleaning the air conditioner's outside unit is just one of many tasks that need to be done to maintain your system's energy efficiency. To keep your air conditioner clean and energy efficient all season long, schedule professional AC maintenance every spring, which includes cleaning the outdoor condenser unit.
Dirt will make your AC less efficient, which means you'll have higher energy bills each month. Dirt buildup on your AC coils will make it difficult for the system to absorb and dump heat, causing the system to be less efficient. You may even start to feel like your AC is running constantly.
If you don't clean the air conditioner before turning it on, it can lead to greater wear and tear on your system. Also, if one of the parts of the unit isn't working correctly, it can damage the unit itself. For example, damaged electrical components or wiring could cause an electrical fire.
As a rule of thumb, you should check it each month and clean or replace it when it looks dirty.
Increased Energy Consumption
A dirty filter forces your AC system to work harder to maintain a cool temperature, leading to an increase in energy consumption. If your utility bills have spiked without any apparent reason, a thorough cleaning of your filter might be all it takes to rectify the issue.
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.
The dirt clogs up the system and creates condensation, leading to mold that clogs the draining system. These clogs, when left unchecked, lead to water leaks coming from the interior unit of your AC.
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.
The AC coil cleaning cost is around $100 to $400 as of 2024, according to Homeguide (for an evaporator coil), and up to $700 to remove and clean the coil. Cleaning the condenser coil costs $75 to $230. ¹ However, there are many ways paying these costs can save you money.
If you spend time in indoor spaces with HVAC systems that are dirty or not well-maintained, you're more likely to have headaches or even migraines. In one study, 8% of people who work in unhealthy indoor air environments had headaches 1-3 days a month, and 8% had daily headaches.
This means it'll take longer for the A/C to cool your home. A dirty outdoor unit will surely send your electric bills through the roof, since your system is working overtime to keep you cool, and it can even cause your air conditioner to overheat and break down.
Air conditioning experts recommend a comprehensive service at least once every 12 months. The best time of the year to service your air conditioner is just before the change of season. If you have a cooling-only unit, spring is the perfect time to service the unit so it is all set for the summers.
The outdoor unit gets grubbier than the indoor unit so spraying it with water to clean it is recommended. Both units should be kept clean and dirt-free. If spraying water on your AC units makes you nervous, it's probably because the standard line is that electricity and water don't mix—with good reason.
If you neglect to clean your air con filters every three months, your system's efficiency can drop. It has to run longer and work harder to circulate air and maintain the desired temperature, which can lead to wear and tear on its components much faster than if it were running under optimal conditions.
If the condenser is not clean and properly allowing air to flow through, it could burn out. Air conditioners with dirty or blocked condensers do not operate efficiently. A congested condensate drain line can even cause water damage.
If your AC is running but not cooling, it could be due to a dirty air filter, incorrect thermostat settings, a malfunctioning thermostat, a refrigerant leak, dirty condenser coils, blocked vents or ducts, a faulty compressor, frozen evaporator coils, or electrical issues.
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.
Many disposable air conditioner filters should be replaced rather than cleaned, as cleaning with water can lead to possible mold issues. Clean the coils and fan of the AC regularly, using a canister of condensed air to blow away dust and buildup.
Dirty filters can cause many problems, from decreased efficiency to ice build-up. But even if those things don't happen, the debris can still damage the delicate components of your AC unit over time. This will lead to premature wear and tear, which can shorten the lifespan of your system.