The South Sound is no longer just warm. It can bring sudden heat spikes, higher humidity, and added stress on your home’s cooling system. Whether your AC is short-cycling, blowing warm air, or failing to turn on altogether, these are common issues during July and August in Lakewood and across Pierce County.
Common HVAC issues can significantly impact your system's cooling capacity during the hottest months, making it essential to address them promptly to maintain comfort and efficiency.
This guide highlights the top summer HVAC issues in Lakewood and what you can do to prevent or resolve them quickly.
Overworked ACs During South Sound Heat Spikes
When temperatures soar, especially during back-to-back hot days, your air conditioner runs longer and harder to maintain a steady indoor temperature. Common issues like dirty filters or refrigerant problems can make the HVAC system work harder, leading to increased energy use and wear. If your AC is not properly maintained, this can lead to:
- Short cycling (frequent on-off cycles that reduce efficiency)
- Blowing warm air despite being set to cool
- The fan is not turning on, or the system is running constantly
Older Lakewood homes with original ductwork or limited attic insulation are especially vulnerable to overheating and uneven cooling. Poor insulation or clogged drain lines can end up causing leaks that reduce system efficiency.
To avoid breakdowns, schedule an early-season tune-up and make sure your outdoor unit has clear space around it for proper airflow. You can also monitor your thermostat settings to reduce unnecessary cycling. Additionally, seal windows and doors to prevent cool air from escaping during heat spikes.
Thermostat Confusion, Miscalibration, or Blowing Warm Air
Many cooling problems start with the thermostat. Whether it’s an outdated model or one that has been incorrectly configured, thermostat issues can lead to inconsistent temperatures or poor cooling performance. Thermostat malfunctions can cause inconsistent temperatures and higher energy bills, making it important to address these issues promptly.
Common signs include:
- The room feels warmer than the thermostat reading
- The system turns on but shuts off before reaching the set temperature
- The unit does not respond when adjusted
After troubleshooting, ensure proper calibration of your thermostat for accurate temperature control. Upgrading to a programmable or smart thermostat can improve efficiency, maintain consistent temperatures, and enhance comfort.
Lakewood homeowners often experience this when switching between manual and smart thermostats or when batteries start to fail during peak usage. Placing thermostats away from heat sources can help maintain accurate readings. Resetting your thermostat and ensuring it is in “cool” mode with the fan set to “auto” is a smart first step.
Dirty Air Filters and Poor Airflow
In the summer, filters clog faster due to increased system use, dust, pet hair, and even wildfire smoke. When airflow is restricted, your system works harder, increasing wear and tear. Weak airflow is a common HVAC problem that can lead to discomfort and inefficiency.
HVAC filter and airflow checklist:
- Change filters every 30 to 60 days
- Vacuum return air vents and grilles
- Keep furniture and rugs away from air intakes
- Have ductwork inspected for leaks or blockages
Regular maintenance helps prevent common HVAC problems like airflow restrictions and leaks.
Restricted airflow can lead to frozen coils, reduced cooling, and even full system shutdowns. Leaks reduce efficiency and can cause ice buildup on evaporator coils. A clean filter is one of the easiest ways to improve energy efficiency and comfort.
Electrical Issues or Tripped Breakers
With so many devices running in the summer, power surges or overloaded circuits are not uncommon in Lakewood homes. If your AC will not turn on at all, a tripped breaker could be to blame.
Start by checking:
- Your electrical panel for tripped breakers
- The outdoor disconnect switch
- The system’s capacitor or contactor for visible wear
While breakers can be reset safely, persistent trips are a sign of a deeper electrical issue. In that case, it is time to contact your local Lakewood AC technicians for inspection and repair.
Clogged Drain Lines and Water Leaks
Clogged drain lines are a frequent culprit behind water leaks and reduced performance in your air conditioning system during the peak summer months. As your HVAC system works overtime to keep your home cool, dirt, debris, and even algae can build up in the drain lines, blocking proper drainage. When this happens, water can back up and leak into your home, leading to potential water damage, mold growth, and costly repairs.
A well-functioning HVAC system relies on clear drain lines and proper airflow to deliver cool air efficiently. If you notice warm air blowing from your vents, hissing sounds, or water pooling around your indoor unit, these could be signs of clogged drain lines or other common summer HVAC issues. Addressing these problems early with the help of skilled technicians can prevent further damage and keep your system running efficiently all summer long.
Proactive maintenance is key to preventing clogged drain lines and water leaks. Scheduling regular maintenance services with a trusted HVAC authority ensures that your system receives thorough cleaning, regular inspection, and proper calibration.
Comprehensive maintenance plans often include air filter replacements, cleaning of outdoor units, and inspection of drain lines, helping to prevent common summer HVAC problems like refrigerant leaks, dirty air filters, and thermostat malfunctions.
Investing in a maintenance plan not only helps avoid increased energy bills and inconsistent temperatures but also provides peace of mind with transparent pricing, iron-clad guarantees, and exceptional service. By staying ahead of potential issues, you can enjoy a cool, comfortable home without the worry of hidden fees or unexpected breakdowns.
When to Book a Lakewood HVAC Pro
You do not need to wait until your system stops working entirely. Mid-summer is the ideal time to schedule an inspection or repair, especially if you are already noticing uneven temperatures, high energy bills, or louder-than-usual operation. As part of your summer schedule, it's wise to schedule a professional tune-up to address issues before they escalate and ensure your system is ready for peak usage.
Professional help is recommended when:
- Your system is blowing warm air
- Ice is forming on refrigerant lines
- The outdoor unit is humming but not running
- Rooms are cooling unevenly or not at all
A certified HVAC technician can diagnose and fix leaks early to maintain optimal efficiency and prevent further damage.
At Mercurio’s, we are a trusted authority in Lakewood, providing top-notch services and exceptional HVAC services. Our comprehensive maintenance plans and full range of HVAC services ensure your comfort and peace of mind all year long.
Prevention tip: Regularly clean outdoor units, focus on clearing debris, and ensure proper airflow to prevent common HVAC issues and keep your system running smoothly.
Scheduling regular HVAC service helps prevent common issues and keeps your system running at optimal efficiency throughout the summer.
Book your appointment today or schedule online with our Lakewood AC technicians
Frequently Asked Questions
Why is my AC short-cycling during the summer?
Short cycling often results from a clogged filter, low refrigerant, or an oversized system that cools too quickly and shuts off before completing a full cycle.
What should I do if my AC is running but not cooling?
Check your thermostat settings, air filter, and outdoor unit for debris. If those look fine, the issue may be with refrigerant levels or electrical components and should be checked by a technician.
How can I prevent HVAC problems during heat waves?
Change your filter regularly, schedule a seasonal tune-up, and keep your outdoor unit free of blockages. These steps help reduce stress on your system during high-demand days.
How often should I replace my HVAC filter during the summer?
In high-use months like July and August, filters should be replaced every 30 to 45 days, especially in homes with pets, allergies, or exposure to wildfire smoke. A clean filter improves airflow and energy efficiency.
Why is my AC making a buzzing or humming noise?
Buzzing or humming sounds can indicate a failing capacitor, loose wiring, or a blocked condenser fan. These noises should not be ignored, as they may signal an electrical issue that requires immediate attention.
Can landscaping affect my AC performance?
Yes. Overgrown shrubs, tall grass, and debris near your outdoor condenser can reduce airflow and cause the system to overheat. Keep at least two feet of clear space around the unit for proper ventilation.
Should I cover my outdoor unit in the summer?
No. Covering your AC condenser restricts airflow and can trap heat, which leads to reduced performance and higher energy bills. The unit is designed to operate in the open air and should remain uncovered.
