If your AC is running but not cooling, it could be due to issues like clogged air filters, incorrect thermostat settings, refrigerant leaks, dirty condenser coils, blocked vents, a faulty compressor, or other electrical issues. Basic troubleshooting includes checking the thermostat, cleaning the filters, and ensuring the outdoor unit isn’t blocked. For more complex issues requiring HVAC repair, such as refrigerant leaks or electrical problems, contact a technician to diagnose the root cause of the problem.
Feeling the Heat? Unpacking the Mysteries of Your HVAC’s Troubles
Have you been noticing lately that your home remains uncomfortably warm in sweltering July afternoons, despite the air conditioning system running constantly? Do you suspect a more significant problem because a strange, gurgling sound is coming from the indoor unit? An AC unit not cooling can lead to higher energy bills, decreased indoor comfort, and potential damage to the unit from overwork. Gelid Air Inc. offers fast and dependable HVAC system repair services, working efficiently to restore the comfort of your home.
| Fast fact: A 2018 Harvard study showed that students who lived in dorms without ACs during hot summer months did worse on cognitive tests than those who had cool central air. |
Here is an engaging exploration of your common HVAC troubles and pro tips to fix them.
Clogged Air Filter
A clogged air filter restricts air flow, straining your HVAC to work harder, in turn becoming less efficient.
Solution: If the heat is becoming unbearable and you notice the room temperature is creeping up despite the AC being set to the cold setting, check and clean your air filter. Replace your filters every three months (monthly is recommended during peak seasons).
Incorrect Thermostat Settings
If it continues to run but the air from the vents isn’t cold, the thermostat might be set to “Heat” or a temperature higher than what you desire.
Solution: Verify the thermostat is set to cool, and the desired temperature is set lower than the current temperature. Check the thermostat batteries and settings, as a malfunctioning thermostat can prevent the unit from kicking on or reading the correct temperature.
Dirty Condenser Coils
The outdoor unit’s coils can accumulate dirt, preventing the system from releasing heat properly.
Solution: Ensure the outdoor condenser unit is clear of obstructions like plants and dirt. Professional cleaning might be needed for heavily soiled coils.
| Interesting factThere are around 2 billion ACs in the world, and the International Energy Agency (IEA) projects that this could almost triple to over 5.5 billion by 2050. |
Refrigerant Leaks
If your HVAC system is low on refrigerants, it can’t effectively absorb heat from your home.
Solution: If you notice the indoor temperature continues to rise, making it increasingly uncomfortable inside, a technician must locate and repair the leak and then recharge the system.
Blocked Airflow (vents and ducts)
Deteriorating ducts can affect the performance of your HVAC. Blocked vents and leaky ductwork can prevent cool air from circulating through your home.
Solution: Open all vents and check for any obvious blockages. Leaky ducts require professional inspection and repair.
Faulty Components
Your HVAC compressor is the heart of the system. Issues with the compressor, fan motor, or other electrical components can stop the system from cooling.
Solution: These are complex mechanical or electrical problems that require a qualified HVAC technician to diagnose and repair.
Frozen Evaporator Coil
Restricted airflow from a dirty filter can cause the indoor coil to freeze.
Solution: Replace the dirty air filter and allow the coil to thaw. If it freezes again, there may be a more significant airflow problem or low refrigerant.
| Did you know? Air conditioning in 2022 used 7% of the world’s electricity, emitted 2.7% of the energy-related CO2 emissions, and emitted 3,2% of the total greenhouse gas emissions when refrigerants are included. |
Drainage Issues
If you notice reduced cooling performance and leaks near the indoor unit, check the condensate drains.
Solution: Your AC must be mounted level to drain appropriately. Ensure condensate drains are debris-free and operating properly. Periodically flush the drain line with bleach and water to prevent mold growth.
Undersized Airconditioner
Under moderate conditions, you may not notice any problems with your AC’s performance, but an undersized AC can’t cool the house effectively in scorching heat.
Solution: Replace the HVAC system with the one that is correctly sized. Or you can add a ductless unit to provide cooling to your home’s hotspots.
Conclusion
If your HVAC system fails to cool, you must start by checking for common issues like a dirty filter, a malfunctioning thermostat, or frozen coils, which can progress to more serious possibilities like low refrigerants or faulty compressors that require professional assistance. Understanding the main HVAC issues helps you find the root cause and get expert repair.
FAQs
- Do modern ACs help reduce my carbon footprint?
Yes, modern ACs are designed to operate with lower greenhouse gas emissions, contributing to environmental protection and a sustainable future. - Why should I replace my older AC unit?
Older units can release CFCs (chlorofluorocarbons), which are damaging to the ozone layer, heating up the Earth. - What is the 20-degree rule for the air conditioners?
You should never set your thermostat for a temperature more than 20 degrees cooler than the outside air. Most units can only handle a 20-degree difference between the outside and inside air temperatures. - How often should I schedule AC maintenance?
Most experts recommend professional HVAC maintenance at least once a year to keep your system efficient and prevent costly repairs. - Can dirty air filters cause my AC to stop cooling?
Yes, clogged or dirty filters restrict airflow, making your AC work harder and preventing it from cooling effectively.