Even the best air conditioners can have issues. Waiting in a sweltering house during a hot Portland summer for a professional to come and fix your AC isn’t anyone’s ideal option. Fortunately, our troubleshooting guide can help you know how to identify some common air conditioner issues that can get your AC back up and running. There is a difference between your AC not working and not cooling, and we help you sort the two with the goal of getting your AC pumping out sweet, cool air quickly.
Why Is My Air Conditioner Not Turning On?
No matter what type of system you have – central, mini-split, ductless, or heat pump – there are commonalities between the types of AC systems that our troubleshooting guide covers. If your air conditioning system just isn’t turning on, then we suggest you run through a few things before calling in an HVAC expert. We will go into more detail below, but here is a quick overview for those who need troubleshooting answers now:
- Make sure the outdoor breaker fuse is positioned correctly
- Check your electrical panel for a tripped breaker
- Confirm that your thermostat is switched on
- Check for a clogged air filter
- Check your condensate pump for proper operation
If you check these and all is in order, then read on for more details and other solutions to the AC not working in your Portland home. It is also time to check how old your AC is. If your AC is older than twelve years, it may be time to replace it.
Why Is My Air Conditioner Not Cooling the House?
Uneven temperatures throughout your Portland home are not uncommon, especially if it is an older home. But if you have been noticing significantly different temperatures in rooms or higher energy bills, there are a few common causes and some easy solutions.
Your Thermostat is Not Set Properly
One of the simplest things to do is check your thermostat setting. In Portland, where summer temperatures can be unpredictable, it’s vital to double-check thermostat settings before assuming your AC is broken. Check to make sure it is not set to heat or that the temperature isn’t set too high.
Your Air Filter is Dirty
A dirty air filter can impede the flow of air and can cause a host of problems. With Portland’s mix of pollen in the spring and wildfire smoke in the summer, keeping your air filter clean is especially important. Blocked filters cause higher energy bills and can even cause your HVAC system to stop working. Regularly cleaning or changing your air filter will help you avoid a future problem or you can save money and stress with routine maintenance.
Blocked Vents are Reducing Air Flow
Blocked supply vents are another reason your AC unit isn’t putting out enough cold air. Check your vents to make sure there isn’t dirt or dust build-up that could be preventing airflow. Toys, furniture, or closed dampers may also be the problem. Rearrange furniture away from registers and check for obstructions that may have fallen into your ducts by accident.
Blocked Outdoor AC Unit
Portland’s rain creates lush greenery that can contribute to debris buildup around your AC’s outdoor unit, so regular maintenance is key. Check for debris around the outdoor unit, like leaves, dirt, or branches, that could be blocking airflow.
Ice on the AC Coils
If you see ice forming on your evaporator coils, the system could be freezing up due to low refrigerant or poor airflow. Turn off the unit and check for blockages. If you suspect a refrigerant leak, call a Jacobs HVAC professional. It’s important to note that a technician cannot diagnose the issue if the unit is frozen. It must fully thaw before we can proceed with any work, which often takes a day.
Why Is My Air Conditioning Fan Not Working?
If the fan on your AC unit stops working, it could be something as simple as your circuit breaker tripping or something more complex.
Burnt Out Condenser Fan Motor
An air conditioning fan motor is a fairly uncomplicated part, but if it doesn’t work, then your home isn’t going to be cool. Because the fan works hard, it gets a lot of wear and tear, which can lead to a burned-out motor. Intermittently running fans, slow-turning fan blades, or a fan that won’t turn can be a sign the motor has an issue. This is a time when you will need to call an HVAC technician. You can prevent AC fan motor burnouts by regular maintenance and reducing dirt and dust in and around your system.
Capacitor is Failing
No, the capacitor isn’t a time-traveling device. Start-and-run capacitors are devices that send energy to the fan motor and power the air conditioning unit when energy is needed. These small but mighty workhorses keep your Portland home HVAC system working properly so that your AC unit doesn’t come to a grinding halt. When it does, you may hear a humming from your AC without it actually starting. That is when your start capacitor tells you it is time to call in an HVAC pro. If your system is short-cycling, randomly shutting off, or delaying AC, it may be that your run capacitor is failing. Again, this isn’t something you can fix yourself. Call an HVAC technician for help.
Condensate Pump is Failing
Checking the condensate pump is a fairly easy DIY test. Condensate pumps typically have shorter lifespans, as they run for both cooling and heating (depending on furnace efficiency). These pumps usually have a test button. Make sure there is some water in the basin, and press the test button to ensure it pumps the water out. A failing or failed condensate pump will often trip the AC so that it won’t run and create a pool of water wherever the AC is (e.g. basement or, worse, the attic).
Why Is My Air Conditioner Making Noise?
Air conditioners, when they are functioning optimally, are pretty quiet. There can be the occasional noise when they complete a cycle, but if they suddenly start squealing, hissing, buzzing, rattling, clicking, or banging – you get the picture – then it is time to do some investigation. Rattling or banging could mean something has come loose while buzzing often means you have an electrical issue. Any kind of persistent noise is a cry for help from your air conditioning unit. Turn off your AC and call an HVAC professional to come out and assess your system for issues.
Why Is My Air Conditioner Not Turning Off?
The opposite of your air conditioner not coming on – not turning off – is also a sign of a problem. If your air conditioner is constantly blowing, it puts a huge amount of stress on your system, leading to high energy bills and a shorter life span. Beyond checking your thermostat that it is at a realistic temperature, a couple of other things could be the cause.
Frozen Evaporator Coil
This could be a sign that you have a refrigerant leak somewhere. Because your AC system can’t get the temperature of your home to ideal, it will keep running indefinitely. This is something that needs to be dealt with immediately. Turn off your system and call a Jacobs AC repair professional right away.
Dirt on the Condenser Coil
The condenser coil’s job is to disperse heat outside your home. If dirt has built up, heat will be trapped inside the air conditioner, and your system will keep running to reach the target cooling temperature your thermostat is calling for.
Read next: Best Time to Schedule Air Conditioner Maintenance
Can I Reset My AC?
Most professionally installed ACs will not have reset buttons, but they will have a circuit breaker. If you have an older Portland home in areas like Sellwood-Moreland or the Alberta Arts District, you may have outdated breakers that have a hard time handling your HVAC system. Check your breaker box and, if needed, upgrade.
Power outages or surges, while rare in Portland, can be the reason your air conditioner isn’t working. However, they will typically come back on as long as you have power. After a power outage, it’s a good idea to check your system and your breaker box. Try turning your AC off at the thermostat and resetting your circuit breaker. Wait half an hour before turning it back on. If you are still having difficulties, it’s time to call in a Jacobs professional before it becomes a worse problem.
Read next: How Long Do AC Units Last & When to Replace Them?
When to Call an HVAC Professional
Safety is always the first priority. When you have hit a wall in your troubleshooting measures, it is time to contact a professional. Trying to “limp along” is just potentially causing more damage to your system that will increase repair costs. If in doubt, turn off your system and contact Jacobs Heating & Air Conditioning for help.
Additional reading: The Role of Air Conditioning in the Fight Against Climate Change
Portland Air Conditioning Experts
If you are looking for help troubleshooting your air conditioning system, our consultants at Jacobs Heating & Air Conditioning can examine your system and determine what repairs need to be made. If you need air conditioning maintenance, we are ready to help you save money and keep emergency AC breakdowns away. You can schedule your next tune-up and keep the stress and hassle out of maintaining your system. No matter what you need, we’re always just a phone call away.
