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Technician repairing air conditioner in Mississauga, ON
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With time, even the best air conditioners can develop all sorts of issues. And if your air conditioner is not working, you will need to be in perfect working order when summer rolls around. You don’t need to stress if your AC is defective. 

At Furnace Repair Mississauga, a team of seasoned air conditioning, ventilation and heating experts is on hand to help you with troubleshooting and fixing your air conditioner. To help you identify common AC problems and their solutions, use this comprehensive Air Conditioning troubleshooting guide.   

Air Conditioner Not Cooling 

AC Not Cooling At All

You should try the following fixes if your AC is blowing warm instead of cold air:

  • Confirm that the vents are not closed
  • Adjust the thermostat accordingly 
  • Conduct an air filter inspection – There will be no air circulating if dirt or any other debris clogs the air filter. The blockage worsens by frost and ice caused by the freezing of the evaporator coils (which is occasioned by the initial clog). Use water, mild soap and a soft brush to clean the air filter if it appears to be dirty.  
  • Inspect the fan motor and fan – You may be looking at a refrigerant line leak or lack of power flowing to the motor if the fan turns too easily. A qualified HVAC expert will have to inspect the unit if this is the case. 

AC Struggling To Sufficiently Cool Your Home

Start by making sure that none of your vents are closed. Cooling your home will be trickier if your vents are closed. If the ducts are closed, warm air in the room will contact cool air from other rooms; thus raising its temperature. 

Leaking Refrigerant Line – You may be using a system that is not suited to your home or worn out if it is not installed correctly or is too old. In addition, an oversized AC will cycle on and off too frequently, reducing its efficiency.  

Water Leaking From Air Conditioner 

AC Leaking Water Indoors

To prevent the occurrence of water damage, switch off your air conditioner if it starts to leak any water inside your home. Water may begin backing up into your home if the drain line for the condensate develops a blockage. To unclog the line on your own, try using a wet-dry vacuum. If that fails, you might be looking at a defective condensate pump or a drain pipe that is full of rust. Your technician will supply all the parts needed for the repair or replacement job.    

AC Leaking Water Outdoors

You may find a small puddle of water beneath your condenser unit on hot or humid days. Puddles are usual in hot, humid weather when the AC works hard to keep your home cool. It is also customary for the unit to start leaking water when the ice on the air conditioner – which forms in colder weather of around 15 degrees and below – starts melting. Try to clean or install new air filters if you find your AC leaking in other circumstances. Contact an AC professional if these solutions don’t work. You may be looking at a broken condensate pan, blocked drain pipe or a refrigerant top-up.   

Water Leaking Out Of AC When It’s Not Turned On 

Your AC may freeze up when it is running with a dirty filter or if it requires a refrigerant top-up. The system will likely start leaking water after turning it off as the ice starts melting. If your AC starts dripping water on your ceiling or floor, there is an elevated risk of water damage. You are discouraged from switching your system on again until you have pinpointed and fixed the issue, especially if cleaning the filter doesn’t achieve any positive results. As is the case with leaks on the outside, you might be looking at a broken condensate pain or blockage.  

Problem Turning Off Your AC 

AC Is Constantly Running 

You may have a dirty filter if your AC seems always to be running. Try fixing the issue by replacing or cleaning the filter. Your system may also struggle with shutting down, cycling too frequently or working harder than it should if it is not a good fit for your home – in terms of size – or is too old. The following issues may also cause your system to run constantly:   

– A defective thermostat

– Defective thermostat cabling

– A stuck fan relay

Issues Turning On Central AC 

A simple adjustment of the thermostat may be all that is needed to overcome the issue of an AC that won’t turn on. If that fails, contact an HVAC technician as you might have to replace or repair your AC.  

Faulty AC Fan 

Malfunctioning Indoor AC Fan 

Confirm that you don’t have a tripped breaker if your AC indoor fan is not working. If everything is in order, your filter is next – give it a proper inspection. Spotted any ice on the refrigerant lines or evaporator coil? If so, wait for it to melt away before checking the fan once more. If the issue persists, it might be the cause behind your frozen coil. You need to call in an expert if you have a frozen coil, as fixing the issue may involve replacing the motor, fan belt or the internal fan relay contacts.     

Defective Outdoor Unit Fan 

You may want to inspect your outdoor unit if your AC is struggling to cool your home. If the fan in the outdoor unit is not spinning, start by checking the fuse box or circuit breaker. 

If the problem persists after a simple reset, you may face several issues. 

Faulty Start Capacitor – If the compressor is still running, you might have a defective start capacitor or fan motor. Try using a wooden stick to push the fan in an attempt to start it. Avoid the temptation to use your fingers as the fan might cut you if it does start. Call in a qualified expert if this doesn’t get the fan to run. We recommend that you keep your unit turned off until the expert arrives. Otherwise, you might end up with a broken compressor – a grave issue.   

Stuck Outdoor Fan Motor – The fan might stick due to dust or dirt. You may need to install a new fan motor, especially if it requires extensive repairs.  

Be sure to book an annual AC maintenance service from Furnace Repair Mississauga after repairing your Air Conditioning system. You will be able to make significant energy savings in the long run, as your AC will be more efficient with regular service – which also helps extend its useful life. 

If you are thinking about replacing your air conditioner, the seasoned HVAC experts at Furnace Repair Mississauga have what it takes to help you out. Whenever you need us, we are ready to assist.

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