Your AC troubleshooting should try to solve problems such as an AC running but not cooling, blowing warm air, not reaching the set temperature, not turning on, buzzing or clicking noise, water leaking, thermostat not working, freezing up, compressor not working, and turning on and off.
This complete guide to troubleshooting your air conditioner system will help you understand the most common problems and how to test whether your AC is facing them. Start reading to discover more!
1. Air Conditioner Not Turning On
The issue could be an air conditioner tripped breaker, a blown fuse, thermostat malfunctions, or a more serious internal problem. Address this potential problem by checking and resetting the circuit breaker if necessary. Chances are a fuse has blown; if this is the case, replace it!
If these steps fail to resolve the problem, it may be time to call a professional to inspect for issues like faulty capacitors or damaged wiring.
2. AC Turning On And Off
If your AC is turning on and off frequently without completing a full cooling cycle, it is likely experiencing short cycling. An oversized unit, problems with the thermostat, or a dirty air filter can cause this.
To fix it, first, check the air filter and replace it if it is dirty. Ensure that the thermostat is not located near heat sources and is working correctly. In cases where the unit is too large for the space, a professional may need to assess and resize the system.
3. Air Conditioner Running But Not Cooling
An air conditioner that runs but does not cool the air is often caused by low refrigerant levels, a dirty condenser coil, or a blocked filter. If the air filter is clogged, begin by checking and replacing it. Then, inspect the condenser coil outside for dirt or debris and clean it carefully.
4. AC Keeps Running Constantly
Is your air conditioner running constantly? Some ACs do, even after reaching the set temperature, which could indicate a dirty filter, a malfunctioning thermostat, or a unit that is too small for the space. You should start by replacing or cleaning the air filter to solve this issue.
Also, guarantee that the thermostat is functioning correctly and set to the correct temperature. If the unit is too small, it may need to be replaced with a more appropriately sized one to ensure efficient cooling.
5. Air Conditioner Blowing Warm Air
Warm air instead of cool air might mean an AC refrigerant leak, a faulty compressor, or a dirty air filter. As usual, the first step is to check and replace the air filter if needed. Double-check the thermostat settings to ensure they are set to "cool," always calling a technician if the issue persists.
6. AC Not Reaching Set Temperature
Dirty filters, insufficient refrigerant, or a malfunctioning thermostat may cause the AC not to blow the right temperature. Replace or clean the dirty air filter and close windows and doors to prevent cool air from escaping.
7. Air Conditioner Thermostat Not Working
An AC thermostat that is not working could be caused by dead batteries, loose wiring, or a faulty thermostat unit. First, try replacing the batteries, then check the wiring for any loose connections. If the thermostat continues to malfunction, replace it with a new one.
8. AC Buzzing
A noisy AC unit with a buzzing sound can indicate several issues, such as loose parts, debris in the unit, a failing compressor, or electrical problems. Turn off the unit and check for any loose parts or debris inside.
In case the buzzing persists after you have cleaned and secured everything, it is best to have a professional inspect the system, as the problem could be related to electrical components or a failing compressor.
9. AC Clicking Noise When Turned On
Clicking noises when the AC turns on or off are usually linked to relay or capacitor issues or a problem with the electrical connections. If the clicking happens only once when the AC starts, it is normal, and you do not need to worry; otherwise, call a professional!
10. Water Leaking From AC Indoor Unit
Water leaking from your air conditioner's indoor unit typically signals a clogged condensate drain, a broken drain pan, or a dirty air filter that causes the evaporator coil to freeze and drip water.
You can start by checking and cleaning the condensate drain line to ensure it is not blocked. Then, inspect the drain pan for cracks and replace it if necessary. Additionally, replace the air filter and clean the evaporator coil to prevent further leaks.
11. Air Conditioner Freezing Up
Restricted airflow caused by a dirty filter, low refrigerant levels, or a malfunctioning blower fan can often cause your air conditioner to freeze. The first step is to turn off the unit and let it thaw. Then, clean or replace the air filter to restore proper airflow.
12. Air Conditioner Compressor Not Working
If the compressor in your air conditioner is not working, the unit cannot cool your space effectively. Electrical issues, overheating, or a refrigerant problem could cause this.
Start by checking the electrical connections and ensuring the unit is receiving power. Clean the condenser coils to avoid overheating. If the compressor has failed, it usually requires professional replacement, as it is a critical component of the AC system.
13. AC Smelling
Finally, if your AC emits unpleasant smells, it could be due to mold or mildew growth inside the unit, a clogged drain line, or even a dead animal inside. To tackle this, clean the air filter and drain line. Use a disinfectant spray on the evaporator coil to eliminate mold or mildew.
If you feel uncomfortable performing a complete AC troubleshooting on your own, or have any doubts in the process, call homeyou's HVAC technicians to help you!
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