My humidifier is set at 40% but the humidistat reading never

, this cool mist tower is ideal for medium rooms. It provides a refreshingly cool, invisible mist, as well as a digital humidistat which offers precise humidity control for your optimal comfort.

I got this off the Sears website so either the room you're trying to make humid is too large, or the humidistat needs to be set properly. Also make sure there is plenty of water in the tank.

Hello, is there water going down the drain tube, if so then the humidifier is working. The pad does not really get saturated the water just trickles on the pad and the the fan blows it into the air duct. your outside air temp determines what your humidistat should be set at.

Outside Temperature -10 F 0 F 10 F 20 F 30 F Recommended Indoor
Relative Humidity 20% 25% 30% 35% 35%

Hello, the first to confirm is if you are receiving 24 volts at the transformer, if you are then check for 24 volts going into the humidistat and out of the humidistat, if voltage is confirmed there then check if your solenoid is recieving 24 volts, if it is and the solenoid is not letting water into the humidifier than your solenoid is bad and must be replaced. If you do not have 24 volts at the transformer then turn off power to the transformer and set your meter to read continuity, you should have resistance if not the transformer is bad and must be replaced. If you have power to the humidifier and not humidifieing properly then you have to set the humidistat according to what the outdoor temp is, the outside temp determines what setting and % of humidity you should have in your home. Here is a what it should be
-20 set to 15%
-10 set to 20%
0 set to 25%
10 set to 30%
20 set to 35%
above 30 set to 40%

Hi,
Sounds like you are not getting the proper voltage to the solenoid valve...
Check for 24v coming off of the transformer...that may be 24vac not vdc...

Then check to see if there is power coming from the humidistat...
unhook the wires to check for the power at the solenoid valve...
check across the two wires...

if there is power the valve is bad and that alone will cost about 90 bucks with shipping...
if there is no power trace back and see where the power stops at...

heatman101

Can you turn off the water flow with the humidistat is set to off?

Hope this solves your problem, look for the humidistat, it should be located on cold air return duct near furnace, make sure it is not set in the on position, if it is, then this is why it is staying on, please set humidistat any where from 20 to 35%, never over 40%. If the humidistat is set properly and is still running, you may have a electrical problem, humidifier circuit should only receive power(24 volts) when the indoor blower motor of furnace receives power, also if you have galvanized plumbing in your home, you may have a piece of rust or lime deposit in the humidifier solenoid valve preventing it from closing, turn water off to humidifier and disconnect water supply line entering solenoid valve inspect & clean protector screen. Good luck.

Hope this helps, check and see if humidistat is set to 35% humidity and that bypass damper on humidifier is in the open position or winter position.(humidistat is usually located on cold air return duct near furnace). Next, replace humidifier media pad, remember to replace media pad (filter) annually, you also may want to clean any lime deposit out of humidifier housing with a solution of warm water and white vinegar before installing your new media filter.Remember to turn power off at side of furnace when cleaning humidifier and replacing media. Before installing new media turn power back on to furnace, set humidistat to the on position, turn furnace thermostat above room temp., and inspect humidifier to see if water is running from top,(you may want to have a bucket under humidifier when checking for water), if you see water running, turn power back off to furnace, properly install new media filter, reconnect humidifier cover & set humidistat to 35%. If you do not see water present, check water supply valve to humidifier and make sure its turned on. If water supply valve is open, then check water supply tubing for blockage.And the last things to check is to make sure all registers through out your home are open and not blocked by any objects, also make sure furnace filter is cleaned, if none of this works refer to installation manual to see if humidifier was sized and installed properly, Good luck.

you need to make sure your humidity level in the house isnt higher then what your humidifier will provide at any givin outdoor temp. this chart is in the owners manual. you cant remove the wires going to the ODS or it will give an error unless you have a resistor to put in its place. Anyway if the humidifier works in test mode according to AA it works so you may have higher humidity than you think, the highest your gonna get is 45% as the temp outside drops it will allow less humidity so it doesnt cause window condinsation (property damage) here is a copy of the chart. the #s on the left are the dial setting
TABLE 2 – % Relative Humidity Guide
Outdoor Temperature (°F)
-10°F 0°F 10°F 20°F 30°F 40°F
1 10% 10% 10% 15% 20% 25%
2 10% 10% 15% 20% 25% 30%
3 10% 15% 20% 25% 30% 35%
4 15% 20% 25% 30% 35% 40%
5 20% 25% 30% 35% 40% 45%
6 25% 30% 35% 40% 45% 45%
7 30% 35% 40% 45% 45% 45%

got to be a tag with model number. humidistat usually has setting on it with temperatures. Try 40 to start. get condensation inside windows? lower a litltle.

There are 3 things to check on the humidifier. Check the metal mesh screen, is it wet after the humidistat is call? If it is dry the water solenoid my not be opening or the nozzle is plugged. The circulating fan blows air through the wet screen to add humidity. Does the fan spin when the humidistat is calling? There is an intake and exhaust on the humidifier. Check that the metal was cut out properly when the humidifier was installed to allow air to feely circulate?