I have never had so much trouble with an air purifier as I did a few weeks ago.
I have been working at a cooling and heating company for many years as the air conditioner, furnace, and air purifier repair man.
The cooling and heating company I work for sells all kinds of air filters, air conditioners, air purifiers, and furnaces. I work in a shop where HVAC customers can bring their broken or messed up a/c units, UV light air purifiers, hot water boilers, and other HVAC units to be fixed. One day, an elderly lady brought in her small HEPA air filter for a repair. I asked what was going wrong with her HEPA air filters, and she said she had no idea. Some days the air filter would work fine, other days it would start making loud noises and get really hot. I took the air filter apart thinking I would be able to fix the problem relatively quickly. I thought that it was just the air filter that needed to be fixed or maybe the air ducts cleaned, but after doing all I knew to do and putting the HEPA air filter back together, I was surprised that the unit was still having the same problem. After taking the air filter apart again and inspecting it, I was at a loss of what to do next. I went and got some different heating and cooling equipment for sale and did some different stuff to the air filter, but to no avail. Finally, I found the problem. A tooth to the lady’s denchers had fallen into the fan of the air purifier and was causing it to malfunction.