We are the experts on Vapac humidifiers. Most problems can be resolved by using the owner’s manual to narrow down the problem and paying attention to any error codes your unit may display. Below are links to owner’s manuals in PDF format. You will also find links to these owner’s manuals placed on the specific pages for each individual model. You can use your browsers print feature to make a hard copy for your personal use. The following links will provide you simple to understand answers to 90% of the questions we receive daily from our clients. If you do NOT find your answer in the manual, email or call us and we will happily answer your question.