Question about Aprilaire 550 Humidifier

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Water leak I have an Aprilaire 550 and when is it turned on, it leaks water all over the floor in my basement. I have installed a new filter and it continues to leak down the side of my furnace. Any suggestions?

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Re: water leak

On the filter side of the water solenoid, remove the black line and make sure it has a small yellow water orifice on the end of the hose where it enters the solenoid. It meters the water flow to your filter. My mothers humidifier was dumping water out the housing. Called the company who installed it and a technician didnt even look for it. They tried to sell her a whole new unit. I searched the internet, bought one on ebay for $6, installed it in two minutes, working great now!

Posted on Jan 24, 2013

Re: water leak

Your drain pipe is clogged up, going to drain- Duh

Posted on Jul 11, 2008

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How far do I need to open the water value to keep the filter wet but not dripping on my cellar floor ?

Sorry to read about your problem, I hope this helps you out.

you have a defective water inlet valve, leaking in water, or you water full sensor is defective.

you should be able to keep the water all the way open, with no problem.

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Jan 02, 2011 | Aprilaire 550 Humidifier

1 Answer

My Aprilaire new water pad has a white substance on it. I mentioned this because twice the pad (tworeleased a sticky, mucous substance that plugged the drain line and caused flooding in my basement. The...

Hello,All the pads have a protectant(white) coating because the pad is aluminum and would rot out fairly quickly from getting wet.The slime is bacteria(fungus) not from the coating that forms from stagnant (sitting) water.Make sure the unit is draining out dry after each cycle.With the pad out pour vinegar OR bleach & water (10:1) to kill the mold in the drain pipe.Do not clean the pad at all ,it gets replaced.They sell an inexpensive wet floor alarm at the store that makes noise when wet.

Oct 12, 2010 | Aprilaire 550 Humidifier

1 Answer

What controls how much water flows into an Aprilaire 550? It was fine until a couple of days ago. I replaced filter, but it still appears to be too strong. It not only runs out the drain tube but is...

In the water line where it connects to the solenoid is an orifice. You can install a smaller plastic orifice or you can install a manual feed valve to where you can control the flow.

Feb 12, 2010 | Aprilaire 550 Humidifier

2 Answers

When furnace cycles on the humidifier overflow spout has a tremendous flow of water that pours all over basement floor. Is there a valve problem ? I can connect a drain tube from this overflow spout to the...

If the water stops when the heater is not running then the humidifier is working fine. I know it seems like alot of water but that's how it's designed.

Jan 02, 2010 | Aprilaire 550 Humidifier

1 Answer

Water leaking from bottom of 550 aprilair humidifer

Hi they should be a hose going to a drain in the floor there are insrtuctions on the wed just google the make and model and you can down load them

Dec 28, 2009 | Aprilaire 550 Humidifier

1 Answer


Hi! is it a humidifier or dehumidifier? if you want to remove mold you need a dehumidifier to absorb the moisture on the air. provided that the unit is capable of absorbing the moisture on your basement floor area. because a typical dehumidifier can only accommodate a 21 square meters floor area.

Sep 01, 2009 | Aprilaire 550 Humidifier

1 Answer

I have a Aprilaire 550 Humidifier. The feed tube is cracked and leaking. How do I go about replacing it. When I use a wrench to remove the copper end, will water come pouring out?

Thanks for your question,
what you need is called an ( Ice maker kit ) any hardware store or appliance store should carry these, the copper tubing is 1/4 in, the kit comes with the service valve for turning on the water once installed, be careful, turning it on before the line is hooked will get ya soaked, it has compression fittings, make sure you dont cross thread the nuts when installing, you may have to shut the main water supply off to the house before doing this, the instructions are fairly easy to read, you can get 25ft - 100ft ice maker kits, you are going to need a tubing cutter and a cresent or box end wrench, and a big flat head screw driver, hope that help ya, lets us know, thanks again for the question,

Jan 05, 2009 | Aprilaire 550 Humidifier

1 Answer

Water Leak

there is a nozzel at the end a black tube at the top of the hummidifier that has come off or the tube is cracked

Dec 24, 2008 | Aprilaire 550 Humidifier

1 Answer

Humidifier leaks water when turned on

Humidifier water pad comes w/ a mark in one end, that mark should be on top. Also check your feed tube they tend to crack some times. if if still leaks water change the water pad

Nov 14, 2008 | Aprilaire 550 Humidifier

1 Answer

Leaking humidifier

Check for an obstructed drain line.

Feb 28, 2008 | Aprilaire 700 Humidifier

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