20 Most Recent Holmes Products (048894556579) 4 Gallon Humidifier Questions & Answers

Per the operators manual you have to reset it. 1. Unplug the unit
2. Remove and refill the water tank, being sure to follow the Daily
Maintenance Instructions. Replace the tank onto the base.
3. Wait 5 minutes for the Automatic Shut-Off to reset.
4. After the 5 minutes, plug in the unit and turn the unit on to HIGH
(HI). The RESET light should now be off (if not repeat steps 1 through
3). In about 2-3 minutes, the humidifier will begin to produce
moisture.

You really have an mineral problem. I have pretty much same here. I only use bottle water that comes in gallon size from grocery. Ot is the only way I have found other than constand cleaners or a water softener. Good luck

Go to http://www.holmesproducts.com/service-%26-support/product-support/instruction-manuals/humidifiers/humidifiers-manual.html and see if one of those listed will help you. The specific model HMS 250 seems to be out of print, but the current ones may help you with what you need to know. If not, contact them at https://www.holmesproducts.com/contactus?cid=contact-us and see if they will email you the correct one.

If the water has been sitting in the reservoir for days without use, it may develop a film on the ultrasonic element which inhibits the creation of the mist to come out the top of your humidifier. I would lift off the tank and empty the reservoir. Then VERY GENTLY with a piece of paper towel, wipe the ultrasonic element (looks like a disk the size of a quarter at the bottom of the reservoir) to clean off any film. Then replace the tank and let the reservoir fill up the tank and try it again. Good luck thebqe