Ac Fan Not Blowing Air

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Why This Restricts Airflow:


Your air ducts deliver cool air throughout your home. So, if there are any holes, leaks or blockages within the duct system, youll notice a decrease in the amount of cold air coming from your vents.

Leaks in the air ducts basically steal from the amount of air that can be delivered into your home.

Note: This article talks about a sudden loss of airflow, but duct issues usually develop over time. So, if you find that your airflow dropped all of a sudden, air duct problems are most likely not your issue unless you had work done recently.

Oftentimes, home construction or a tech working on or near your ducts can result in kinks in flex duct or damaged, leaky ducts.

Air Conditioner Leaking Water Outside

On hot or humid days, you might see a little puddle of water under your condenser unit. In hot, humid weather, thats normal, as long as it only forms while the unit is working. In cool weatherusually, 60 degrees or lessan air conditioner can freeze up, causing the unit to leak water when it melts which is also normal. If its leaking in other circumstances, try cleaning or replacing your air filters. If that doesnt fix the problem, schedule a service call. You may need more refrigerant, have a blockage in your drain pipe, or have a broken condensate pan.

So Your Ac Blowing Warm Air Could Be Due To A Refrigerant Leak

We saw how the refrigerant, when put under pressure, gets hotter. The same is true of the inverse. With low refrigerant levels, the chemical liquid in the coil expands, cooling it until it freezes.

Because your AC is a closed loop system, if your refrigerant is low, it is escaping the refrigerant line through a leak. And once the coil has frozen over, your AC cannot extract the warmth from your homes air. It is simply sent back un-conditioned.

Dont try fixing the freon leak yourself. Call an HVAC technician to do a leak search to locate the leak, repair the hole and add the correct refrigerant into the evaporator coil to normalize the levels. .

Your AC not blowing cold air as a result of dirty condenser coil.

Your outdoor unit houses the other end of the coil, where the refrigerant arrives as a hot vapor and is released into the outdoor air.

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What To Check When The Ac Is Cooling But Not Enough


Check to make sure that your air registers are open and free of blockage. Sometimes these get closed, or dust can build up over time and limit airflow. Remove the registers with a screwdriver and make sure that they are clear of dust and blockage.


Another cause of blockage and reduced airflow is dust buildup in the filters. These filters should be changed or cleaned every 3-4 months, but unfortunately, many homeowners change them once a year or less. The two main places to look are the return vent that pulls the air from your home to be cycled through the cooling system, and the air handler itself. Check both of these filters and consider changing or cleaning them. Its a good idea to change them every season, so add that to your calendar!


Refrigerant problems can cause the indoor unit and evaporator coil to freeze. Believe it or not, but the coil inside your air conditioning system will become one large block of ice. The longer the air conditioning system runs under these conditions the larger the block of ice. If you are experiencing low or no airflow, check for frost formation on the copper lines leading to the indoor evaporator coil. Chances are if ice is forming on these lines the coil is one giant ice cube.

What To Do If Your Blower Fan Stops Working

Apartment Ac Unit Not Blowing Cold

Take glove box out on passenger side. Upper left corner is Blower Fan Knock on it. If it comes on it is going out will need to replace. Blower fan will not come on at all? Check Fuses & Blower Fan? Fuses replaced for blower fan,took blower fan out and tested it and it worked? Well it has to be you climate control panel nothing else to check!

Where is the fan blower motor on my AC?

All fuses good all relays good. The fan blower for your ac/heater is located under the glovebox. Take your hand and smack the fan blower motor a few times. Thats all it took for for mine to start working again. Its been working for over 6 months now!

What happens when there is no AC or heat?

When it does happen, youre left with a miserably underpowered heat or AC system. It will still work with no fan, and youll usually still be able to control the temperature of the air that is blowing or trickling, out. But a climate control system with no fan to push the air around is anything but controlled.

Why does the air blower not work when the a / C is on?

Turn A/c on thermostat with auto fan, A/C kicks on but there is no air blowing through vents, yet if Heat is turned on than there is air blowing through. So the blower works just not when the A/C is on. It doesnt matter if it is on auto or just fan same thing happens, with heater ok with A/C not ok.

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Why Does My Ac Blow Hot Air But Not Cold Air

The reading for this sensor sensor 05 for my 1998 C280 was 159 with the car running for 10 min and 158 without starting the car in the morning after a night with outside temp 80. The problem I have is that ac blows hot/warm/outside temp air initially, then it blows cold air for 1 or 2 min then it blows outside air.

Why is my air conditioner not working properly?

When you turn on the AC to cool things down indoors, only to find its not working properly, you need it fixed as soon as possible! The problem may be due to a broken component in your AC system, but it also could be the result of improper maintenance. Maintaining your AC is essential to keeping it in proper working order.

What should I do if my AC is not running?

These tips are also relevant if your AC is running but the air coming out of the vents isnt cool, if theres no air coming out of vents in one room or if youre experiencing low air flow through the vents in your house. In short, no matter what specific AC problem you might be having, you should always make sure of the following first:

Where is the air filter on my AC?

Find the filter either behind your return grates or in a slot before the furnace/air handler unit. Learn more: Has Your Air Conditioners Air Filter Betrayed You?

Why Is My Air Conditioner Not Blowing Hard

Feeling cool but weak air coming from the vents inside your home? You’re probably having a hard time staying comfortable. This is a sign of low airflow-and by “airflow” we mean the amount of air flowing over your evaporator coil -which is pretty crucial to your system’s operation and the parts involved. This weak airflow can be caused by many different issues, some are easy to resolve and others you’ll need to get a professional on board. Whatever you do, don’t ignore the problem. So, let’s get right into it.

First, let’s tackle the issues you can fix on your own… Dirty air filter If your air filter is clogged with a thick grey blanket of dust, it’s basically suffocating your system’s equipment and making it really tough for air to be moved, cooled, and cycled back into your home. How to fix: Check your air filter regularly and clean/change when you can see dirt. The air filter is located inside your home’s return grille or inside a slot near your air handler.

Blocked return grille/vents Your return vents are the vents where air is sucked into the air conditioning system. If these are blocked in any way, it will reduce the amount of air coming out of your supply vents . How to fix: Remove anything blocking your return vent.

Kinked flex duct If your flex ductwork has any severe kinks, airflow will be restricted . How to fix: Check in your attic for severely kinked ducts and straighten them out. You may need a professional to help.

Dirty evaporator coil

Blower malfunctions

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Air Conditioner Not Cooling Enough

Check your vents to make sure all of them are open. If even one of them is closed, it can make it more difficult to cool your entire home, since the warm air from the room with the closed vent will mix with the cooled air from the others. Otherwise, you may have another problem, such as a leak in your refrigerant line. If your system is old or was installed improperly, it may be wearing out or is the wrong size for your home. Systems that are too large for your home will cycle on and off too quickly, reducing their efficiency. A system thats too small for your home will work harder to cool your home, leading to premature breakdown.

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Easy Air Conditioner Repair: Fan Not Spinning – Blowing Warm Air

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Technical Reviewers & References

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How To Test The Blower Motor

  • Unplug the electrical connector from the blower motor.
  • Turn on the multimeter and insert the probes into the connector, one at each point making sure the metal part of probes dont touch each other.Note: You can also use a test light.
  • Turn on the AC fan.
  • The output voltage on the multimeter should read around 12 volts.
  • If the volts reading is normal, it indicates a fault in the blower motor.
  • The more accurate way to test if the blower motor is bad is to connect it directly to a 12 volt battery using alligator clip test cable. If the motor does not spin after directly connecting to the battery, it confirms that the blower motor is dead and should be replaced with a new one.

    The Thermostat Could Be The Culprit For Your Ac Blowing Hot Air

    This first check on our list is simple enough make sure your thermostat setting is set to cool . Next, check that the fan is set to AUTO, not ON. This way, the fan only rotates when theres cool air ready to be blown into your home. And finally, check that the temperature is set at the desired level!

    If that doesnt work, theres likely a mechanical issue along your air conditioners closed loop system. You can learn about several reasons as to why your thermostat is not working.

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    Air Conditioner Leaking Water Inside

    To avoid costly water damage, turn your air conditioner off if it leaks water inside your home. Your condensate drain line might be clogged up, causing water to back up into your home. DIYers can try using a wet/dry vacuum to unclog the line. If that doesnt work, your drain pan may have rusted out or your condensate pump may have broken down. Your technician will be able to replace or repair the damaged parts.

    New update with additional information as of July 8, 2022.

    Many air conditioners have a float switch that trips and shuts off the air conditioner when water backs up in the condensate drain line and leaks water inside your home.

    Watch this video for additional tips on clearing a clogged drain line and keeping it clear.

    Issue With Evaporator Coil

    Troubleshoot Your Heat/AC When Car Fan Is Not Working

    The evaporator coil is the indoor component of your central air conditioning system. If your home has a heat pump system, the evaporator coil is housed inside the fan coil cabinet if the indoor unit is a fan coil. The evaporator coil is activated to remove heat energy and humidity from the air as it passes through it. The next stage in this cycle is for cooler, more comfortable air to be circulated into your house.

    Coils can also freeze up if the refrigerant is running low within the system. You may have a frozen evaporator coil if you notice:

    • Frost surrounding the copper refrigerant tubing coming from the coil cabinet
    • Higher energy bills
    • Inadequate cooling
    • Condensate seeping from your indoor unit

    If it’s difficult to access the evaporator coil, troubleshooting problems connected with a frozen evaporator coil should be left to an HVAC professional.

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    Ac Not Blowing Cold Air Due To Basic Electrical Issues

    Lets first cover the basics. All air conditioners require access to electricity to prevent them from blowing warm air. If the compressor is not getting adequate power, it would be able to compress the R410A or R22 refrigerant. The consequence will be no heat exchange and it will result in the air conditioner blowing same-temperature air.

    First, check the cables. The power cable has to be correctly plugged into the outlet. Make sure youre using the correct voltage. Smaller AC units require 110/120V while bigger units will require 220/240V. Also check if any of the power cables have been damaged.

    Who doesnt plug in their air conditioner?

    Thats the common response. The reason for check the power cables is because air conditioners require a surge of power when starting and when the rotary compressor starts working at 100%.

    Everybody has an air conditioner plugged in. However, when the surge comes, two things can happen:

  • A fuse is blown.
  • Amp breaker is tripped.
  • Its likely you wont notice either the blown fuse or 30A breaker tripped. What you are likely to notice is that your air conditioner was blowing cold air and all of a sudden the air conditioner stopped blowing cold air.

    To fix basic electrical issues that might be causing the problem, check if the fuse is blown or if the amp breaker has been tripped.

    If everything works OK, check the thermostat:

    Solution: Call Our Air Conditioning Experts

    Without HVAC experience or the knowledge to diagnose bad electric components, contacting our repair professionals is the best choice.

    In this scenario, internal capacitors are responsible for keeping the fan running, and it is essential to measure the voltage properly if there is going to be a replacement required.

    Leave the power issues and complicated electric repair to our quality HVAC specialists. Its complicated and dangerous work, but were fully insured and equipped with years of experience and training. Plus we have awesome customer service for that stress-free experience!

    If your AC fan isn’t spinning or not blowing cold air and you think your HVAC unit needs maintenance or repair, call Air & Energy of NWFL today at to set up a service appointment.

    Our quality team will repair or replace any AC, condenser fan, compressor, capacitor, contactor, or anything else that will restore your comfort.

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    Leaking Or Low Refrigerant

    If your cooling system can’t produce cool air, you may have a refrigerant leak. Refrigerant, also known as Freon, is a chemical coolant that is critical for producing cold air from an AC unit. It goes through the system’s indoor and outdoor coils, changing from liquid to gaseous form. It absorbs heat energy and humidity from inside air and releases it outside your home.

    Refrigerant levels in the system does not diminish over time, but if there is a leak somewhere in the refrigerant lines, the system may not have enough coolant to produce cold air. However, you should not attempt repair refrigerant leaks on your own. Refrigerant is an EPA-approved chemical that can only be handled by properly certified experts. Your HVAC pro will have the tools to discover and repair the refrigerant leak, then replenish the coolant so you can return your home to a pleasant, cool temperature.

    Where The Wind Blows A Word About Auto Direction Sensing

    AC indoor fan not blowing air

    Most HVAC blower motors are hard-wired to spin either counter clock-wise or clock-wise plug and go. But some run an automatic sensing procedure the very first time its used to determine the proper direction of rotation. According to my local dealers HVAC expert, motors like this rely on back pressure to work their magic. So the air handler cover must be reinstalled BEFORE powering the unit on.

    The first time the motor is powered, it will spin for several seconds in each direction to determine the proper operating direction. After doing its thing, the ECM locks out that feature and the motor will always start up in the correct direction. From then on, its safe to run the blower without the cover in place.


    If the motor cant figure out which way it should spin, it will default to CCW rotation. The installation guide doesnt mention that you should first run it with the cover in place, but it does explain how to alter the rotation sensing decision if you need to. Honestly, it looks like a tedious process that I would not want to have to deal with.

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