Aprilaire 800 water inlet valve short-cycling

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Old 01-05-15, 03:00 PM
K
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Aprilaire 800 water inlet valve short-cycling

I have an Aprilaire 800 humidifier that's been running great with one exception. The unit is opening and closing the inlet valve every 2, 5, 10, etc. seconds. It's a random thing... sometimes it behaves itself, but quite often the unit just commands the valve to flop open and closed. When this is going on, the call for humidity is constant, and the unit remains on. I've also verified that it's not in "drain" mode when this happens as well.

Edit: I changed out the water canister last week, but it didn't seem to help.

The unit is doing its job, but the constant water hammer noise and needless wear and tear on the valve are bugging me.

Has anyone seen this issue or have any recommendations?

Many thanks!
 
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Old 01-05-15, 04:51 PM
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Welcome to the forums.

I'm not an authority on the steam unit although I do service them. I haven't run across the problem you are describing.

What are the lights on the front doing ?
 
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Old 01-05-15, 07:13 PM
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Thanks for the quick response!

It seems the lights aren't doing anything out of the ordinary. When the unit is humidifying, I have a steady GREEN light for "Steam." The light stays steady green when the valve is short cycling as well.

The FILL light illuminates every time the valve opens.

The service light is OFF.

The On/Off light is steady GREEN.
 
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