Split AC Compressor Not Working But Fan Is Running – 5 Possible Issues
split-ac-compressor-not-working-but-fan-is-running-5-possible-
HVAC problems are notoriously hard to deal with. For example, it can be confusing as all hell if you notice your split AC compressor not working but fan is running.
It takes some serious detective work to get to the bottom of this matter at hand, which is why we recommend you reach out to a knowledgeable HVAC technician for help.
Still, a little bit of knowledge never hurt anyone. In some cases, you may even be able to resolve the issue yourself.
Continue reading this post and you’ll learn more about the compressor and what to do if you detect your split compressor not working but fan is running.
What Is A Compressor In An AC Unit?
A compressor is one of the most important components in a split AC system. It compresses the refrigerant (a liquid chemical that absorbs heat) by transforming it into a high-pressure gas, pushing it through the system in the process.
This happens during each cooling cycle.
When a compressor fails, your AC won’t be able to complete this step. The fan might work properly, but without the compressor kicking into action, your AC system is rendered pretty much useless.
All of this sounds scary, but there is no reason to worry. You can eliminate most compressor trouble by having your air conditioner maintained annually by a licensed expert.
Why Does A Compressor Malfunction?
A split AC compressor not working but fan is running is a confusing scenario, yet, it often happens as a result of the following:
1. Issue with the thermostat
Any time you’re experiencing difficulty with your AC, you should first check your thermostat. Someone in your home might have inadvertently switched it to “fan-only” mode, which means the system is circulating the air throughout without any cooling whatsoever. Hence, the compressor won’t have a reason to power on.
In other instances, your thermostat might be faulty and unable to communicate with the system that the compressor should do its thing. As a potential solution, replace the batteries. If the problem persists, you may have no other choice but to contact an HVAC professional.
We advise you to invest in a smart thermostat. These newer devices are not only easier to operate, but they can help you drastically reduce cooling costs.
2. Dirty air filters or coils
A clean HVAC is a happy HVAC. Before jumping to conclusions about your split AC compressor not working but fan is running issue, make sure to check if the air filter and the evaporator coils are dirty.
But what does dirt inside the interior components of a split system have to do with the compressor?
Simple – a dirty filter or the evaporator coil will heavily impede the airflow, which may cause the compressor to overheat and shut down as a precautionary measure.
You should replace the air filter and remove any dirt from the evaporator coil located inside your air handler. While you’re at it, be sure to clean the outdoor unit.
Let the HVAC cool down a bit before resetting it.
If the compressor powers on, mission accomplished! Kick back and enjoy the rest of your day in peace.
3. Power connection problem
Your compressor may also be unable to run because it’s not receiving power. But if this is the case, how is the fan able to run properly?
In most systems, the fan will receive power from inside your home, so it won’t be affected by power connection issues plaguing your compressor.
Check the circuit breaker for the exterior unit. There may be a blown fuse or a tripped breaker.
If faced with more significant electrical hassle, your best course of action is to set up a service appointment with an HVAC company in your area.
4. Failed capacitor
A capacitor relays the power to the compressor, so when it malfunctions, you will probably spot the split AC not working but fan is running conundrum.
Testing and replacing the capacitor is complicated, and since it holds a hefty amount of electrical charge, you shouldn’t try to diagnose it yourself.
Fortunately, for a qualified technician, diagnosing and repairing the compressor is a routine task that can be done in under half an hour.
5. Broken compressor
If nothing of the above applies, there is a very real chance that the compressor itself has kicked the bucket. This can happen due to overheating or old age.
Regardless of why it malfunctioned in the first place, you can either replace the compressor or the entire exterior unit. We recommend the latter, especially if the system has reached the end of its lifespan (15 years for well-maintained units) because it’s not financially viable to replace individual components one by one.
A new unit will not only be simpler to maintain and provide you with peace of might, but you’ll also be able to save more money on energy bills.
Get Your Unit Running Again
In cases where you’re faced with a split AC compressor not working but fan is running, the underlying cause may be as straightforward as a filter swap. However, your compressor may need attention from a reputable HVAC technician.
These individuals have a knack for diagnosing AC problems quickly and the necessary skill set to ensure you don’t have to deal with the same malfunction again. Once you get the unit working properly again, you should acquire an HVAC maintenance plan to extend the lifespan of the system and save more money on energy.
But, who to call?
If you live in Central Florida, your best option is Mid-Fla Heating & Air.
In addition to affordable pricing plans and a 100% satisfaction guarantee, when working with us, you’re working with the finest HVAC technicians in the area. Our main goal is to provide you with the best value for your money – so you can always expect the utmost professionalism from our specialists and an extraordinary level of customer service.
Ring us at 561-750-1625 or fill out our contact form if you encounter any problem with your AC or want to start maintaining your HVAC equipment properly.
