Whether your AC is older or you just installed the unit, it’s very frustrating when it doesn’t work properly. Troubleshooting AC can help you find the source of each problem and fix it so you can get back to a cool and comfortable home.
Some problems are easier to fix on your own, while others require the help of professionals. This guide should help you know the difference and identify issues with your unit more easily.
Troubleshooting AC: Most Common Problems
We’ve repaired many broken AC units, and they often have these problems: the AC is blowing hot air or the AC is not turning on. Other common problems include the AC making noise or the air conditioner freezing up the outside unit.
If you’re experiencing any of these problems, there’s still hope for your air conditioning unit. Here’s your guide for troubleshooting AC problems and how to fix each one.
1. The AC is Blowing Hot Air
If the AC is simply not blowing cool air, a dirty filter could be to blame. Dirt in the filter blocks the airflow and can make a condenser unit freeze. Make sure you’re cleaning or swapping your filter every month, depending on the specific instructions for your unit. The solution could also be as simple as ensuring your thermostat isn’t set to “heat” if your unit is also a heat pump.
2. AC Making Noise
You may have turned on your air conditioner and thought, “That doesn’t sound so good”. Different noises can signify different problems with your AC unit.
- Hissing: a hissing sound is associated with a refrigerant leak. Extreme leaks can sound like bubbling. If you suspect refrigerant leak, call an HVAC professional as soon as possible.
- Banging: rattling or banging can signify a blower motor issue.
- Buzzing: a buzz often means there are problems within the electrical work in your unit.
- Clicking: If you hear some clicks, especially when turning your unit on or off, there may be an issue with relay. Relay is what sends power to AC compressor and clutch.
- Squealing: Problems with the fan motor or compressor can result in a squeal or screech noise.
3. Air Conditioner Freezing Up Outside Unit
A multitude of problems can cause the air conditioner to freeze up. Firstly, you’ll want to check your filters and ensure they’re clean. Any blockage of air flow can cause this problem.
Another thing you’ll want to check is the outside temperature. Your unit can freeze if it’s simply cold outside. If your unit is a heat pump, you’ll want to be especially diligent about winter maintenance.
Continually clean out the vents throughout the year, as freezing can happen no matter the season. Running the blower can help to defrost evaporator coils. Always shovel snow off the unit in the winter and avoid any air flow blockages. Building a small fence around your outside unit can help to block winter winds, keeping your unit at a lower temperature.
Other problems associated with AC unit freeze will require an expert’s help. Your blower motor might be malfunctioning, leading to the freeze. Coolant levels might be too low, the refrigerant might be leaking, or the contractor might be stuck. Don’t hesitate to call licensed HVAC specialists if your air conditioner is freezing up the outside unit.
4. The AC is Not Turning On
When the AC is not turning on, the solution can be simpler than you think. As soon as you notice that your AC is not turning on, check your thermostat to see if the batteries are dead. If the problem persists with working batteries, make sure cooling mode is turned on.
If the AC is still not turning on, go to your circuit breaker to see if it’s tripped. Flip the switch off then on to give it a reset and retry the AC unit.
What Do You Do After Identifying the Problem?
When you identify the issue with your unit, you may want an expert’s help diagnosing and fixing the problem. This is the best way to ensure your AC goes back to working properly and cooling your home for many years to come. Luckily, many companies (including us at Live Free Heating Cooling Electric) offer free estimates (terms apply). Chat with us today to get started on helping your HVAC units run their best!