We recommend cleaning your window AC unit every month during the cooling season. Dust the unit's exterior as part of your weekly home cleaning routine. Make sure you replace your home's HVAC filter every 1-3 months to lower dust, dander, and other airborne irritants that could clog your window AC filter.
To minimize energy usage and reduce utility costs, the A/C coils should be cleaned at least once a year. It is estimated that dirty evaporator and condenser coils can increase the energy usage of your air conditioning system by over 30 percent.
Get Your AC Coils Cleaned
Get your coils cleaned annually. If you live in an area where your AC unit is exposed to excessive amounts of dirt, dust, debris, or moisture, it is best to regularly clean your coils every three months or so. Every AC unit and environment is different.
Depending on the system, an optimal time of 3 minutes is required before switching the system on. If the system is turned on without waiting for at least 3 minutes, the system can start with a pressure load. This pressure load prevents the system from cooling properly, which could affect the system in the long run.
Don't run your AC 24 hours a day
In a published analysis that was not peer-reviewed, Pigott and other researchers found that less energy was used across the three types of air conditioners studied when cooling was shut off for an eight-hour period, compared to running the systems all day at 76 degrees Fahrenheit.
The New Regulations
Starting January 1, 2025, all new residential air conditioners and heat pumps must utilize A2L refrigerants. Older refrigerants like R-410, which are likely the refrigerant used by your current system, are being phased out.
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.
Most HVAC professionals recommend AC coil cleaning once or twice a year. If dust and dirt build up on the coils, major problems can occur. 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.
Turning on the AC Too Soon
Wait at least 30 to 60 minutes for the unit to dry. Water and dampness can interfere with the unit's operation and cause electrical components to short circuit.
After all, one thing we were all taught when we were very young is that water and electrical appliances don't mix. So how do you clean your outside AC unit? The good news is that you absolutely can spray water on your air conditioner if it needs a cleaning, and nothing bad will happen.
In most cases, you can get away with cleaning your coils once a year with a seasonal tune-up. However, you should consider where your unit is located. If you're in a big city with heavy air pollution, you may want to have the coils cleaned two times a year.
Coils should be cleaned regularly to ensure that they stay in excellent condition and free of leaks. Cleaning your AC's evaporator coils is a task that you can try tackling yourself or if you feel more comfortable contact an experienced air conditioning company near you to help you.
If proper maintenance is regularly performed, then the evaporator coils should last 10 to 15 years, which is the ideal lifetime for an evaporator coil and comparable to the lifespan of an AC unit. However, how long your evaporator coils last will be much shorter if your unit is improperly maintained.
A product like Air Conditioning Coil Cleaner removes counterproductive dirt and oxidation on air conditioning coils. When fins and coils are clean, air circulates more fully and AC systems operate and cool more efficiently, reducing the unit's power consumption.
Cut the Power. Start by turning off your air conditioning unit. Cleaning a standard HVAC system while it's running is dangerous—both for you and your air conditioner. There's usually a shut-off box somewhere near the condenser unit (the portion of the AC system located outside your home).
The new refrigerant changes in 2025 are part of a larger effort to make air conditioning systems more environmentally friendly, while still keeping homes comfortable. These changes are being driven by regulations to phase out older refrigerants like R-410A, which have a high global warming potential (GWP).
An HVAC replacement cost is $7,500 on average. This range could be as low as $5,000 or as high as $12,500, depending on the type and size of your unit, the brand, and labor costs. Your overall cost for a new HVAC unit could reach $22,000 if you add new ductwork and additional features like a HEPA filtration system.
Part of that obligation includes having and maintaining air conditioning. If your employer does not fulfill their duty to maintain a safe environment then they may be liable for damages and you may be eligible for workers' compensation.