A/C Not Working? Essential Checks to Get Your Cooling Back on Track

July 28, 2025

When your air conditioner stops working, it’s more than just inconvenient—it can quickly turn your home into an uncomfortable sauna. Before calling for service, try these essential troubleshooting steps to pinpoint the issue and potentially get your cooling restored faster. 

 


1. Check Thermostat Settings 

Start with the basics: 


  • Make sure the thermostat is set to "Cool" 
  • The fan should be set to "Auto" 
  • The temperature should be at least 1°F lower than the room temperature 


If everything appears correct but your system still doesn’t run, the culprit could be: 


  • Dead batteries (for non-wired thermostats) 
  • Loose or disconnected wiring 
  • A malfunctioning thermostat needing replacement 

 

2. Inspect the Air Filter 

A clogged air filter restricts airflow, causing poor cooling and higher energy costs. Although some filters can last 9 to 12 months, you should at least check, replace or clean your filter every 1–3 months, especially during heavy HVAC use. 


If you'd like help keep filters changed and systems optimized year-round, consider one of our maintenance memberships for scheduled tune-ups and filter reminders. 



3. Examine Outdoor Unit & Condenser 

Step outside to inspect the condenser unit: 


  • Are fan blades spinning smoothly? 
  • Is the unit free from leaves, grass, or debris? 
  • Have shrubs grown too close, blocking airflow? 


Turn off the power at the breaker before removing debris and gently clean the fins with a soft brush or with water using a garden hose. Proper airflow is essential to keep your system running efficiently. 


Struggling with debris buildup? Learn more about how we can complete the maintenance for you. 



4. Listen for Strange Noises or Frozen Coils 


Noises like rattling, buzzing, or grinding suggest fan or motor issues. Ice buildup on coils often means low refrigerant or poor airflow. Both are beyond DIY fixes and need quick attention. 


Our repair technicians are equipped to diagnose these problems, whether it’s refrigerant recharge, motor replacement, or part repair. 



5. Confirm If the Circuit Breaker Tripped 

Blown breakers are another common culprit. Head to your breaker panel; the A/C breaker might be tripped or flipped off. Reset it firmly and let your system run. If it trips again, do not reset repeatedly—this could indicate electrical faults that warrant professional attention. 



6. Consider Low Refrigerant or Closed Valves 

If cooling level or airflow remains weak, it could be due to: 


  • Low refrigerant — maybe from a leak 
  • Indoor or outdoor fan inoperable 
  • Damaged or pinched refrigerant lines 
  • Evaporator coil is plugged or iced up.  If iced up it will need to thaw completely before restarting.  The thawing of ice will likely cause quite a bit of water around the furnace or fan coil. 


These are complex issues requiring professional tools and expertise. Contact us for safe and legal handling of refrigerants. 

 


7. Think About System Age & Efficiency 

A/C units typically last 15-20 years, with many having a shorter lifespan due to lack of maintenance. Declining performance, rising bills, or frequent breakdowns might signal that it’s time for a replacement. 


Visit our replacement services page, so we can help you choose an energy-efficient model suited to your home. Learn more about our financing options here. 



8. Prevent Future Breakdowns 

Stay ahead of issues with preventive care: 


  • Sign up for our maintenance plans for twice-yearly cleanings 
  • Monitor your system for irregular sounds or airflow 
  • Keep the outdoor unit clear and the area well-maintained 


Regular service not only protects comfort but saves money; preventive maintenance can extend system life and improve efficiency. 



When to Call the Pros 

If your A/C still isn’t working after these checks, it’s time to call in experts. Our certified technicians are ready to help with anything from routine repair to new installations for residential and commercial properties. 


Contact us at 402‑489‑9227 or get a quote here. We’ve proudly served Lincoln, NE and surrounding areas since 1982 with fast, reliable comfort solutions. 

Get Your Free Estimate & Schedule Your Installation!

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How Nebraska Weather Impacts Your HVAC System Year-Round

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Nebraska weather can be hard on any heating and cooling system. In Lincoln, homeowners deal with freezing winter temperatures, windy spring weather, hot summer days, and seasonal temperature swings that can put extra strain on HVAC equipment. For anyone looking for reliable HVAC in Lincoln, NE, understanding how weather affects your system can help you prevent breakdowns, improve efficiency, and keep your home comfortable all year.  At Custom Cooling and Heating , we know how quickly Nebraska conditions can affect furnaces, air conditioners, filters, and airflow. Each season creates different challenges, and staying ahead of them can help you avoid costly repairs. Winter Can Push Your Furnace to Its Limit Cold Nebraska winters often mean your furnace runs for long stretches without much of a break. When temperatures stay low, your heating system must work harder to maintain indoor comfort. That added demand can expose problems like dirty filters, worn components, ignition issues, or poor airflow. Homeowners may notice uneven heating, cold spots in certain rooms, or higher energy bills during the winter. If your furnace is older or has not been maintained, winter is often when those hidden problems show up. Scheduling heating service before peak cold weather can help your HVAC in Lincoln, NE run more efficiently and reduce the chance of an unexpected breakdown. Spring Weather Can Affect Air Quality and Airflow Spring in Nebraska often brings wind, dust, and pollen. Those conditions can affect both indoor air quality and HVAC performance. A clogged air filter or dirty ductwork can make it harder for your system to circulate clean air, especially during seasonal transitions when temperatures change quickly. If your home feels dustier than usual or allergy symptoms seem worse indoors, your HVAC system may be contributing to the problem. Replacing filters and checking airflow in the spring can help improve comfort before summer heat arrives. Summer Heat Makes Your AC Work Harder Hot summer weather in Lincoln puts major demand on air conditioning systems . During periods of high heat, your AC may run longer and more often to keep up. If your system already has issues such as dirty coils, low refrigerant, or weak airflow, summer is when they are most likely to affect performance. Some of the most common warning signs include rising utility bills, longer cooling cycles, uneven room temperatures, or an AC unit that struggles to keep the house comfortable. Preventive maintenance before summer can help identify small issues early and keep your system ready for the hottest part of the year. Fall Is the Best Time to Prepare for Heating Season Fall is one of the best times to schedule HVAC maintenance in Lincoln. After months of summer cooling and before winter heating demand begins, this is a smart time to inspect your system, replace filters, and make sure everything is working properly. A fall tune-up can help catch worn parts, thermostat problems, or airflow issues before colder temperatures arrive. It can also improve efficiency and help your furnace operate more reliably when you need it most. Nebraska Weather Affects HVAC Efficiency Year-Round Seasonal extremes are not the only issue. Nebraska’s constant shifts in temperature, humidity, and airflow can gradually wear down HVAC components over time. Motors, electrical parts, filters, and duct systems all work harder when your system is constantly adjusting to changing weather. According to the U.S. Department of Energy , routine HVAC maintenance, including changing air filters and scheduling regular inspections, helps systems operate more efficiently, improves airflow, and can extend the life of your equipment. Staying on top of maintenance is one of the best ways to prepare your heating and cooling system for Nebraska's changing seasons. That is why routine maintenance matters throughout the year. A well-maintained system is more likely to handle seasonal stress, perform efficiently, and avoid unnecessary wear. For homeowners who want to stay ahead of seasonal maintenance, Custom Cooling & Heating offers Maintenance Memberships designed to keep your system running at its best year-round. Memberships include scheduled tune-ups, system cleanings, performance and safety checks, priority service, and discounts on repairs, making it easier to prevent unexpected breakdowns before Nebraska's weather puts your HVAC system to the test. Trust Custom Cooling and Heating for HVAC in Lincoln, NE Keeping your home comfortable through Nebraska’s changing seasons starts with the right HVAC care. Custom Cooling and Heating , provides dependable HVAC in Lincoln, NE, helping homeowners stay ahead of weather-related strain on their systems. Whether you need seasonal maintenance , repairs , or a replacement , working with an experienced local team can help protect your comfort, lower energy costs, and keep your heating and cooling system running strong year-round. Contact us today and get an instant quote !

HVAC Repair vs. Replacement in Lincoln, NE: How to Know When It's Time for a New System

June 11, 2026
When your HVAC system starts having problems, one of the most important decisions you'll face is whether to repair your current unit or invest in a new one. For homeowners in Lincoln, NE, Nebraska's hot summers and cold winters can put significant strain on heating and cooling equipment. At Custom Cooling & Heating , we help Lincoln-area homeowners evaluate their options and make the best decision for their comfort and budget. How Long Do HVAC Systems Last? Lincoln's seasonal temperature swings can take a toll on HVAC systems over time. Between summer air conditioning demands and winter heating needs, homeowners in Lincoln, NE often experience more wear and tear than systems in milder climates. Regular maintenance plays a significant role in extending the life of your HVAC system and helping it operate more efficiently over time. Most systems last around 10 to 15 years, though some can last even longer with proper care. As your system ages, wear and tear, climate conditions, and usage patterns can begin to affect its performance. If your HVAC system is approaching this age range, you may start to notice issues like: Uneven cooling or heating Strange noises or odors Higher energy bills Frequent cycling on and off Excess dust or humidity If you’re noticing any of these, it’s time to weigh your options. When to Choose HVAC Repair If you're looking for HVAC repair in Lincoln, NE, repairing your system is often the most cost-effective option when the unit is relatively new and the issue is isolated. Consider repair if: Your system is under 10 years old and has been regularly maintained. The issue is isolated, like a broken thermostat, clogged filter, or worn capacitor. The repair cost is less than half the price of a new unit. Custom Cooling & Heating offers fast, honest repairs. Our certified technicians will diagnose the problem and provide clear options, so you only pay for what you need. When to Replace Your HVAC System Replacement is often the smarter choice if: Your system is over 10-15 years old. You need frequent repairs because costs add up quickly. Your energy bills are rising due to declining efficiency. You want newer features like smart controls or better air quality. According to the Energy Star, upgrading to an Energy Star-rated HVAC system can save you up to 20% on energy costs. At Custom Cooling & Heating, we offer free estimates on new installations and will help you select the right system for your home. Repair vs Replacement: Comparing Costs It’s tempting to pick the cheapest option, but ongoing repairs and high energy bills can make an old system more expensive in the long run. Here’s a quick tip: Multiply the cost of the repair by the age of your system. If the result is more than $5,000, replacement may be your best choice. Other factors to consider: New systems are more efficient and save money every month. New units come with warranties, protecting you from future costs. Older systems are more likely to break down at inconvenient times. Why Choose Custom Cooling & Heating? For more than 30 years, Custom Cooling & Heating has been helping homeowners throughout Lincoln, NE and the surrounding communities stay comfortable in every season. As a locally owned and family-operated company, we take pride in providing honest recommendations, quality workmanship, and exceptional customer service. Whether you need HVAC repairs , system replacement , or preventative maintenance , our experienced team is committed to helping you get the most from your heating and cooling system. We also offer maintenance memberships designed to improve efficiency, reduce unexpected breakdowns, and extend the life of your equipment. Conclusion If you're trying to decide between HVAC repair and replacement in Lincoln, NE, the experienced team at Custom Cooling & Heating can help. We'll evaluate your system, explain your options, and provide honest recommendations based on your home's needs and budget. Contact us today to schedule an HVAC assessment and keep your Lincoln home comfortable year-round. Ready for a professional opinion? Contact Custom Cooling & Heating today to schedule an HVAC evaluation and explore your options with confidence.