Summer in Colorado can warm up fast, and your air conditioner usually feels that first heat wave right away. If your system has been sitting idle since last season, a little preparation now can help you avoid weak airflow, surprise breakdowns, and higher energy bills later. If you would rather have a professional handle the seasonal check, Brothers Plumbing, Heating, and Electric is here to help.
Below is a practical, updated checklist for getting your AC ready before summer settles in.
Start With the Air Filter
A dirty filter can choke airflow, make your system run longer, and leave your home feeling less comfortable. During peak cooling season, it is a good idea to check the filter regularly instead of waiting until it looks completely packed with dust.
- Find the filter first. In many homes, it is located at the return grille or inside the air handler or furnace cabinet.
- Confirm the size and type. Before replacing anything, check the dimensions on the existing filter and note the airflow arrows on the frame.
- Replace disposable filters on schedule. If the filter looks dirty, swap it out with the same size and rating recommended for your system.
- Clean reusable filters only if they are designed for it. Rinse them gently, then let them dry completely before putting them back in place.
Clear Space Around the Outdoor Unit
Your outdoor condenser needs room to breathe. When grass, leaves, mulch, or windblown debris build up around it, the system has a harder time releasing heat.
- Trim back plants and weeds. Give the unit open space so air can move around it freely.
- Remove leaves and loose debris. Check the base of the unit and the area inside the top grille if debris has collected there.
- Shut off power before cleaning. Safety comes first whenever you are working near moving parts or electrical equipment.
- Use a gentle hose spray. A light rinse can wash dirt from the cabinet and coil surface, but a pressure washer can bend delicate fins.
Check the Coils and Pay Attention to Warning Signs
Your AC relies on two main coils to move heat out of your home. The outdoor condenser coil is easier for homeowners to inspect, while the indoor evaporator coil is usually tucked away and better left to a trained technician.
Outdoor condenser coil
If the coil is dusty or covered with cottonwood, pollen, or grime, performance can slip. After shutting off power, you can gently rinse the outside of the unit and look for visible damage to the fins or cabinet.
Indoor evaporator coil
The indoor coil is more delicate and harder to access. If it is dirty, frozen, or showing signs of moisture problems, professional service is the safer choice.
- Watch for ice. Frozen lines or ice on the indoor coil usually point to an airflow or refrigerant problem.
- Notice unusual moisture. Water around the indoor unit can mean a clogged condensate drain or another service issue.
- Listen for new noises. Buzzing, rattling, scraping, or wobbling fans should never be ignored.
- Pay attention to weak cooling. If the system runs but the air never gets comfortably cool, it is time for a closer inspection.
Give the Fan and Moving Parts a Quick Visual Check
Not every problem shows up as a total breakdown. Sometimes the first clue is a small wobble, a worn part, or a sound that was not there last summer.
- Look at the outdoor fan from a safe distance. It should spin smoothly without shaking or scraping.
- Check for bent or damaged blades. Even a small imbalance can put extra strain on the motor.
- Be aware that some older systems use belts. If your equipment is belt-driven, cracks, slack, or fraying are signs that it needs service.
- Do not try to rebalance parts yourself. When moving components look off, it is better to shut the system down and call for help.
Leave Refrigerant Work to a Professional
It is never a good idea to check refrigerant levels on your own. Refrigerant diagnostics require the right tools, the right training, and a careful look at the full system. If the charge is low, there may also be a leak or another mechanical issue that needs to be corrected.
- Long run times can be a clue. The system may struggle for hours without bringing the temperature down.
- Warm air from the vents is another warning sign. Low refrigerant is one possible cause, but it is not the only one.
- Ice on the refrigerant line should be taken seriously. Running the unit in that condition can lead to more damage.
- A proper diagnosis matters. Simply adding refrigerant without finding the cause can turn a small issue into a larger repair.
Program Your Thermostat for Summer
Once your system is clean and operating normally, take a few minutes to program your thermostat for summer conditions. The goal is simple: stay comfortable when people are home, and avoid overcooling an empty house.
- When you are home during the day, start with a comfortable setting such as 78°F and adjust from there.
- When the house is empty, raise the setting a few degrees instead of shutting the system off completely.
- In the evening, have the thermostat return to your comfort setting before everyone settles in.
- Overnight, choose the coolest setting that still feels comfortable without making the unit work harder than it needs to.
A few small habits can help, too. Keep heat-producing lamps or electronics away from the thermostat, and remember that setting the temperature extremely low will not cool the house faster. It only makes the system run longer.
When a Professional Tune-Up Makes Sense
A seasonal checkup is worth considering if your AC is older, has not been serviced in a while, or already seems off. Professional maintenance can catch worn electrical parts, drainage issues, airflow problems, and coil buildup before the hottest stretch of summer arrives.
- Schedule service if the AC blows warm air. That is a clear sign something is wrong.
- Book an inspection if energy bills have climbed. Reduced efficiency often shows up on your monthly statement before a breakdown happens.
- Call if the unit short cycles. Frequent on-and-off operation can point to control, airflow, or refrigerant issues.
- Do not wait on strange smells or repeated noises. Small concerns are usually easier to fix early.
Need Help Getting Your AC Ready?
If this all feels like more than you want to tackle on your own, that is completely understandable. A professional startup visit can save time, lower stress, and help you head into summer with more confidence. Brothers Plumbing, Heating, and Electric can inspect your system, handle the detailed maintenance, and help you get ahead of mid-season problems.
How often should I change my AC filter?
It depends on the filter type, the system, and conditions inside the home. Many homeowners do well by checking it monthly during the cooling season and replacing it when it looks dirty or when the manufacturer recommends it.
Can I rinse my outdoor AC unit with a garden hose?
Yes, a gentle rinse is often fine after the power has been shut off, especially for clearing dust and loose debris from the outside of the condenser. Avoid using a pressure washer because the fins can bend easily.
What are the signs that my AC may need professional service?
Warm air, weak airflow, ice on the lines, water near the indoor unit, unusual noises, rising utility bills, and short cycling are all good reasons to have the system checked.
Should I try to add refrigerant myself?
No. Refrigerant work is not a basic DIY task. A technician needs to measure system pressures correctly, identify the reason for the problem, and make sure the repair is done safely.
What thermostat setting is best in summer?
There is no single setting that works for every household, but many people begin around 78°F when they are home and raise the temperature a few degrees when the house is empty. Comfort, humidity, pets, and health needs should all be part of the decision.
Why does my AC smell dusty when I first turn it on?
A brief dusty smell at first startup can happen if dust settled on parts during the off-season. If the smell lingers, smells musty, or seems electrical, it is best to schedule service.
Is it normal for my AC to run longer on very hot days?
Yes, longer run times can be normal when outdoor temperatures climb. What is not normal is a system that runs constantly without cooling well, struggles to reach the thermostat setting, or cycles on and off every few minutes.
When should I schedule AC maintenance?
Spring is usually the best time, before the hottest weather arrives and before service calendars fill up. If that window has passed, it is still worth scheduling an inspection as soon as you notice reduced performance or unusual behavior.
