Question about Aprilaire 600 Humidifier
The solenoid valve opens up ok when the furnace comes on but begins to have spasms, clicking on/off rapidly for about 5-10 seconds before shutting off. Very annoying. I have replaced it once but the new one is having the same problem. The Furnace was replaced this summer (Acroaire 90+) so I am wondering if this old humidifier is simply not compatible with the new furnace. I checked the wiring and it seems to be wired as per instructions. I am willing to get a ne humidifier but scared I’ll have the same problem if it is originating from the furnace. Any help is appreciated. Bob
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Posted on Jan 02, 2017
You need to determine whether the problem is in the solenoid or in the furnace electronics. You could put a voltmeter on the solenoid connection to see if the furnace is still holding the solenoid open after the blower stops. This will tell you whether it is the solenoid or not.
Posted on Feb 19, 2007
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
It is possible you may have wired it wrong. Make sure your humidifer is not robbing power from your thermostat. This would explain when your humidifer makes a demand to come on it robs power from your t-stat making it lose its call for heat. Wire your humidistat to the "w" terminal and the common terminal so it only runs on a call for heat. With the bypass type of humidifier you purchased it wont do you any good to run when the heat isn't running anyway. If you want an independent operation humidifier you need a steam type.
Posted on Jan 05, 2009
close the by pass air flow valve. shut off the water supply and finally flow the thermostat wire to the transformer or the controller and shut off or disconnect. Unit should be serviced before winter. Cell may need to be replaced
Posted on Aug 10, 2009
SOURCE: Water drips from unit
>>Is this dripping normal?<<
No - it sounds like the fill valve, which is operated electrically, is leaking and probably needs to be replaced. If there is a separate water shut off valve for the humidifier, turn it off and see if the dripping stops. You are correct in that the humidifier should not operate in the summer. You will need to turn off the water to the humidifier to replace the valve. Also look for any other leaks in the tubing connected to the valve.
While you're there, check the unit for scaling and also check the pad or wheel - it probably needs to be replaced too.
Posted on Aug 17, 2009
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