aprilaire 550 humidifier


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Old 12-14-21, 02:49 PM
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aprilaire 550 humidifier

I have aprilaire 550 humidifier hasn't been used in at least 5 years. I have replaced the filter and the selinoid plus cleaned the unit all up even took humistst and cleaned all up including connection. there is water flow to the selanoid checked the wiring all seems good. still doesn't work. Is it possible the humistat is bad ?
 
  #2  
Old 12-15-21, 01:11 PM
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Welcome to the forums.

You need to check step by step.
Did you disconnect the water supply to the solenoid and verify good water flow ?
If not.... possibly a clogged saddle valve.

Did you verify 24vAC to the solenoid when it should be opening.
If it's there and you don't hear the solenoid opening... the solenoid is bad.

If you do hear the solenoid operating.... check the little plastic orifice in the line
that connects to the solenoid and delivers water to the top of the mdeia.
 
 

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