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Similar to other HVAC appliances, your AC may experience faults from time to time. If it fails to perform during an extreme heatwave, it can make life uncomfortable. The worst scenario is when your AC is running but blowing warm air. This particular issue is encountered so often, especially across New Jersey.
In this blog, we will explore the common causes of AC blowing hot air and the possible fixes to apply. We will cover it with respect to both residential HVAC systems and commercial HVAC systems. However, the primary focus will be on commercial ones.
There are several causes of an AC not blowing cold air. There might be a faulty component, poor ductwork, or inaccurate calibration responsible for this particular issue. Let’s explore the most common reasons.
If you notice warm air from the AC, the thermostat might be the culprit. One of the most common mistakes in this regard is setting the blower fan to “ON” instead of “AUTO”. When the blower fan is set to ON, it continues to blow air even when the AC is not working. The result is a spread of warm air in the space. Apart from this, there can be some other reasons, such as a glitch in the thermostat, poor calibration, or inaccurate placement.
Possible Fixes: First, check the blower motor setting and turn it to “AUTO”. If the problem persists, try other fixes such as recalibration, changing location, etc.
Dirty or blocked filters have consequences beyond just warm air from the system. They can reduce performance, lead to faster wear and tear, and cause a spike in energy bills. When the filters are clogged, there is a restriction in airflow. As a result, your system just can’t expel the heat outside. Ultimately, your AC starts blowing warm air due to the running blower motor.
Possible Fixes: Just replace your filters to fix the issue. If your filters are reusable, clean them properly and install them again.
Refrigerant is one of the most essential fluids in an air conditioner. It is responsible for transferring the heat from inside to outside through a channel of tubes. When the flowing refrigerant is not at sufficient levels, the entire refrigeration process stops. The refrigerant is not generally used inside the process. It can only get leaked if there are some pinholes in copper tubes containing this essential fluid.
Possible Fixes: Inspect the system and identify the areas of refrigerant leaks. Seal those leaky areas or replace the components, followed by topping off the wasted refrigerant.
For a warm air issue at your business facility, the culprit might be the frozen evaporator or condenser coils. These coils can get frozen due to low refrigerant levels or dirty filters. Both of these issues cause a restriction in airflow, which leads to ice formation around and inside these coils. These frozen coils can cause reduced AC performance, warm air issues, and serious compressor failures.
Possible Fixes: You need a professional AC repair service to fix this issue. The technicians will shut your system off, thaw the ice, and clean the coils completely.
Not all the time is the culprit your AC system. Sometimes, there can be an issue with associated electrical components. It may include some issues such as tripping the circuit breaker, a blown fuse, faulty wiring, or inaccurate insulation. These issues are, though not directly involved in the refrigeration process, yet they can disrupt the process due to malfunctioning HVAC components.
Possible Fixes: Try resetting the circuit breaker. If the problem persists, call your local HVAC pros for professional assistance.
An AC works as an interplay of various components. Every component performs its function and contributes to the smooth operation of the whole system. When one component is faulty, the whole process is disturbed. Sometimes, even a minor fault in the smallest valve can render the whole system nonfunctional.
Possible Fixes: Book a professional HVAC service. The technicians will inspect your system and identify the faulty component. At the next step, they will repair or replace the part with issues. If many components are damaged or not working, you might need a complete new AC installation.
So far, we have covered the primary causes of warm air from the AC and how to fix them. The next step is to prepare our beloved commercial customers to prevent such issues in the future. Here is what the experts at Lehigh HVAC recommend in this case.
We have done our job. Now, it’s your turn. Take a close look at your AC. Does it blow warm air sometimes? Look for the possible causes from the above list. If any of those apply to your case, try the possible fixes. If the issues persist, call Lehigh HVAC. We will inspect your system thoroughly, figure out the causes, and repair it. You can expect your original, working air conditioner to be restored after a single visit.
Contact us at 484-961-7044 to get an estimate!
