I have tested the solenoid and it has 38 V to it.
Hello, sounds like the solenoid valve is sticking and will need to be replaced.
Thanks ....I suspected that but hoped it wasn't it.A second opinion always helps !! :-)
When the humistat switch is turned to OFF the water does turn off of course.It is only when the switch is left on at 45% that it continues to run water whether the furnace is running on heat or not. Does that clarify ?
Ok, well if it turns off than I would suspect the Humidistat as being the problem. If itnwere the solenoid valve it would continue to run regardless.
Just had a thought...As the furnace is in the basement ..is the Humidistat reading the actual humidity in THAT area and will not turn on below 45% as that is actual ?
It will read the humidity in the return air duct if mounted there. The humidifier should turn off once the blower motor shuts off regardless of what the setting on the humidistat is.
The humidistat is mounted on/in the furnace return duct..I will double check everything !
:-)
Is there a sail switch or current sensing relay used with this humidifier? The reason I ask is because if there is none installed the humidifier cannot turn off with the blower motor. Iyou can only turn it on and off manually without it.
I wouldn't think that would be ...That would mean that the furnace would have to be monitored and humidistat turned on and off every time. the heat went on and off Maybe a sail switch/current sensing relay is incorporated inside the Humidistat ?
No a sail switch will be mounted on the return air duct and senses the air flow in the return air duct, when the air passes over it it will engage the humidifier. A current sensing relay is mounted on the blower motors common wire and once the blower is energized it will turn on the humidifier. Either one can be used but is needed to turn off and on the humidifier
I suppose the small 4 1/2 " x 3" plastic panel on the return duct with the switch to set /turn on/off must have the sail switch inside ? I took it off, and cleaned the dust off it It has a small electronic board. with the wiring from it going to the solenoid valve.. I'm still puzzled why the switch doesn't click until the 45% humidity setting ! Many thanks for sticking with me on this,as I don't want to replace something that doesn't need it ..Thank you ! .
The humdistat wont have the sail switch inside of it, it is a seperate switch that mounts int the return air duct. If you can check the blower motor and see if a small square with a metal part has a wire going through it, it should be the white wire coming from the motor to the control board. This would be the current sensing relay, looks like they did not use a sail switch.
I replaced the humidistat today and that solved it ..Thanks for all of your help ! :-)
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Final check reveals that the water doesn't turn off when the furnace heating shuts off and the humidistat stays at 45 %.It only shuts the water off if the switch is turned off manually.. If I manually turn the switch to 45% once again (no heat on) the water starts flowing again..I guess that confirms that the problem is the humidstat ?
Is there a sail switch or current sensing relay used with this humidifier?
No there isn't a sail switch or sensing relay
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