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Alpine Air Technologies – Blog

Fixing a Loose Fan Blade in my new Air Purifier

Posted by admin on September 22, 2016 in Air Purification with No Comments


Is your fan blade on your new or used air purifier loose and not securely attached? This may cause damage to your unit and your unit may malfunction, so it’s important you deal with this issue as soon as you can. You must tighten the loose blade immediately to your unit, before you begin to use it. Here are specific instructions for tightening the fan blade on the following Alpine air purifiers: LA-2000 to Classic LA-3500 – model #’s: E300/RH02; 300/RH02; 300/H02; 300/UH02; HL2PRO; ZL3500/UV.

Tightening the fan blade requires disassembling your air purifier. It’ll be a smooth process if you follow these instructions, and it shouldn’t take longer than 15 minutes to complete. First, you will have to unscrew the two knobs in the front of your air purifier. These are the left knob, which is the 03/sanitizer, and the right knob, which is the fan/UV. Note that each of the knobs are attached to the air purifier with a tiny screw. Find the little round opening within each of the knobs to access the screws and undo them.

Second, once the knobs have been safely removed, you need to carefully flip the unit upside down. Make sure you are placing it on a solid, hard surface to ensure stability to the ground (tables, countertops, wooden floors, etc). Then unscrew the two bottom bolts, and flip it back to an upright position. Now, you should be able to remove the chassis from the cabinet and safely place it on a hard surface.

Third, you will locate the metal protection bar. It should be directly in front of the fan blade. Carefully unscrew it, giving you easy access then to the fan blade which should be sitting in the center of the motor shaft. The blade should not be too close to the front of the motor shaft nor too close to the fan motor body, as this would allow for contact to be made to the two metal prongs of the negative ionizer. Realistically, it should be placed in the middle of the shaft, about one inch away from each end of the fan motor. With access to the fan blade, carefully fasten the metal clamp of the fan blade with pliers. The metal clamp should be right in the middle of the fan blade over the opening through which the fan motor shaft is placed in. If you don’t have pliers, you can easily obtained some at any local supplies store such and Home Depot or Lowes.

Lastly, it’s time to put everything back together. You will reattach the metal bar in front of the fan blade and screw in the green ground wire which is connected to the metal bar (not all models will have the green ground wire however). Then place the chassis back into the cabinet fully and reassemble the unit’s screws and bolts by following the above instructions in the opposite order. You will want to keep an eye out for the fan blade movement for the next few times you use the unit to ensure you have solved the issue.

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