This should be a simple yes or no question but I can't determine it myself. I have an AprilAire 550 Humidifier built into the ducting from my furnace. It appears that the humidifier isn't working due to water never spraying out of the line. I have narrowed it down to the solenoid. I can test the line going to the solenoid with a multimeter and confirm that 24 volts is going to it. Whenever the solenoid is connected, while monitoring the power, the power stays at 24 volts but the solenoid only opens the valve briefly when I connect it.
So I do know solenoids can be both intermittent and not. My question is, should this solenoid be an intermittent one? If the answer is no then of course I will replace it. I believe the answer is no since the humidistat and furnace circuit will determine whether it should be on or off.