Question about Humidifiers
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Posted on Jan 02, 2017
SOURCE: Humidifier control .
if humidifier was wired into thermostat circuit for power instead of seperate transformer , this can happen. you need to see if you voltage going to the solenoid valve. if you do , and it isn't opening, the valve is bad . this is assuming that it is using a # 50 relay to come on only when the fan runs . . make sure the water valve is open
Posted on Dec 28, 2007
First check to see if the two water sensing probes have been cleaned. After cleaning, if the problem still persists, try the following.
There is a small thermostat switch that sits on the heating coil underneath. This thermostat is designed to prevent the coil from overheating when no water is present. What probably has happened is the switch is doing what is designed to do but has become defective and is opening and closing at a lower temperature. So what is happening is the red light reset indicator will come on because this switch opens, the coil starts to cool and the switch closes and the light goes off. Because it is defective, this is occurring when it shouldn’t, causing this maddening on/off cycle.
Fortunately, this sensor is easy to replace if you’re handy. Make sure you unplug the humidifier from power. Turn it over, remove six screws, and carefully lift the lid. Look toward the heating element and you will see a small button type device with two wires plugged into it and is attached with two screws off to the side of the element. This particular thermostat is obsolete and very difficult to find. However, there is an excellent substitute made by Stancor for around $5.00. Their part number is STO-325.
Remove the two screws and lift off the thermostat and slide the wire connectors off. Simply reverse the process for installation and be careful to replace the bottom lid, being careful not to crimp the wiring.
Posted on Dec 30, 2007
If you overfill it, the red light goes on. just dump a little out and it should go green. Worked with my crane duck humidifier. Hope it helps
Posted on Jan 21, 2011
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