Troubleshooting My HVAC That Won't Activate Anymore

Is your HVAC not working? Every year, millions of homeowners waste a lot of time and money on issues they could troubleshoot themselves. At this point, it's important to make a distinction between identifying the problem and fixing it. For many A/C faults, you will still need to get in touch with our specialist engineers for External link opens in new tab or windowHVAC, to arrange for repair. However, you could save a lot of time and hassle if you let us know what's broken. In some cases, you can even proceed to simple repair jobs yourself. We've compiled a simple HVAC troubleshooting guide to help homeowners keep their cool when the A/C won't start.


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Check the Air Filter

The air filter is the most frequent cause for fault. A clogged or dirty air filter can lead to a variety of issues, including equipment failure. However, before your A/C unit is affected, you might notice worrying signs of malfunctions, such as high energy bills, difficulties reaching programmed temperatures, water leaks, reduced airflow coming from the air vents. Thankfully, replacing the air filter is the easiest way to solve the issue. As a rule of thumb, homeowners should External link opens in new tab or windowreplace their air filters every 3 to 12 months, depending on the situation.

Check the Thermostat

HVAC companies are frequently called on-site to repair "broken A/C units" that were never broken in the first place. So, to save yourself the unnecessary repair fees, we'd recommend checking your thermostat settings. The wrong thermostat settings could prevent your A/C unit from starting or get the wrong temperature from the air vents. It's worth mentioning that if your thermostat is directly exposed to "extreme temperatures", such as being in the sunlight or a colder part of the house, the temperatures will be off.

Check Outdoor Condenser

The outdoor unit, or condenser, often accumulates dirt that could block the vents. A clogged condenser can affect the cooling function and generate high energy bills. Additionally, it can lead to frequent repairs if you are not careful. You can try to clear the condenser by removing the dirt or surrounding plants that could block access. Most homeowners can clear minor obstructions easily. However, if there is too much to do or you are uncertain about how to proceed, it's best to get in touch with a professional for specialist cleaning.

Check Air Vents

Blocked air vents can cause your A/C unit to malfunction. This can happen when you move furniture and accidentally External link opens in new tab or windowblock the air vents. The A/C unit is likely to struggle to cool down your home while running high energy costs. You might also notice water leakage or even ice on refrigerant lines. Checking and freeing your air vents will alleviate pressure on the system.   

Check For Leakage

Leakage, whether duct, moisture, or refrigerant leakage, is unpleasant. Moisture leakage can indicate that the A/C unit fails to drain excess moisture from the system. Duct and refrigerant inspection can be more alarming. While these aren't issues you can fix yourself, you can reach out to your repair team to let them know.


In conclusion, checking for faults with your air conditioning can help troubleshoot your HVAC. Common issues such as dirty air filters or condenser and thermostat mishaps can save you a lot of hassle when spotted early. For anything else, you want to call a professional team for repair.