Antihistamines, H1. Histamine antagonists or antihistamines are drugs that relieve allergy symptoms.Histamine is a chemical used to identify and remove substances that trigger an allergic response. Ã¢ There are four histamine receptors &#40;designated H<sub>1</sub>, H<sub>2</sub>, H<sub>3</sub>, H<sub>4</sub>&#41;.
Water leaks in central air conditioners are almost always caused by a problem with the condensate pan or drain pipes. The most common of those problems is a clogged drain line. When your condensate drain line gets clogged, water backs up and builds up in your pan. With nowhere to go, that water will begin to leak over your drain pan and onto your system and your floor. Another problem that can lead to a water leak is a crack somewhere in the pan or in the drain pipes.
This can be a nasty problem, and itâs definitely not something that you want to ignore. So today weâre going to talk about why your air conditioner might start to smell bad and what can be done to fix the problem! Possible reasons why your air conditioner smells bad. 1  Air conditioner is too big for your home. 2  Everyone knows that an air conditioner is used to cool your home, but many people donât realize that it also performs a second function: dehumidification.