Question about Aprilaire 700 Humidifier

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Water is leaking from the bottom of the unit

I have an Aprilaire 760 attached to my furnace, but it just started to leak quite a bit of water from the bottom of the unit. It leaked a considerable amount of water before I noticed the problem. I have since unplugged the humidifier and it seems to have stopped the dripping. Is there a solution you could recommend, or should I just leave it unplugged? Thanks for any help...

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  • Anonymous Jan 19, 2009

    we hace the same thing

  • rstarr Jan 24, 2009

    I have the same problem. It has happened to me before and replacing the water panel has fixed the problem, but not this time. I've tried 2 new Aprilaire water panels and it is still leaking. The leak this time is much more than any of the previous times. The most recent time that the leak occured was when I bought a Honeywell water panel at Home Depot that was marked as compatible with the 760. It was made of a different material and didn't work well. Replacing with an original Aprilaire panel fixed it.



    I'm hoping that someone comes up with a fix for this.

  • piesmatt Jan 26, 2009

    I have an Aprilaire model 240 attached to my old Williamson furnace. I need to get a new water panel, but in the meantime I want to unplug the humidifier. If I do this, will it damage the furnace at all?

  • Anonymous Jan 27, 2009

    I have the exact same problem. It have worked great for the last three years, until this heating season. I have only used Aprilaire water panels since I installed the unit. There are no leaks in the line. I'm thinking there is a batch of defective water panels. The fan seems to be pulling large amounts of watter off the panel and it drips to the bottom.

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The tune up kit that I ordered arrived on Friday and I installed most of it on Friday night. While it is nice to have a new frame and the distribution panel and I think the price of the whole kit was fair considering it comes with the parts and 2 water panels, the fix was really simple.

The kit came with the water distribution tube with with a new blue orifice (Aprilaire #4232) already inserted. This orifice is in the end of the plastic tube at the solenoid end. When I removed the old water distribution tube, the old orifice was not really dark blue anymore but kind of a light blue and was deteriorating from 12 years of exposure to the chemicals in the water. What should have been a pin-hole size opening in the orifice was up to about 2mm or a little more so the orifice was letting way too much water through.

If anyone else has this leaking problem, and your orifice is several years old, I would check that first. It is a $2.75 part and may be the cause of the leak. The whole feed tube kit is only $8.75 and includes the feed tube, nozzle, orifice, ferule, compression nut, strainer so if you need to replace the orifice, I would order the whole feed tube kit for a little bit more.

Hope this helps,
Roger...

Posted on Feb 03, 2009

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After shutting down my 760 for the summer, I recently turned it on and it started leaking water from the bottom.. This is the first time I've had this problem. The unit is several years old and I average a filter change every two years. I took the unit apart and made sure all the drain components were secure in their proper discharges. This fixed some of the problem. I then noticed that the fan housing was not aligned all the way with the housing on the furnace. After correcting this, no leaks.

Posted on Feb 02, 2009

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2 Answers

Aprillaire 760 leaks from the bottom left of the case. panel is new, drain is clear, all vents open in the house, the panel cage is free from excessive scale. Any ideas?


Here is a link to your humidifier http://www.iaqsource.com/article.php/my-aprilaire-humidifier-is-leaking-what-to-do-about-it./?id=35

Oct 19, 2011 | Aprilaire 700 Humidifier

1 Answer

Have aprilaire #760 ,changed water panel, and turned furnace on and water started pouring out of the bottom of furnce? lots of water---


Typically, we find that the most common reason that you start to see leaking from the humidifier is that the water panel is not changed frequently enough. We do recommend that the water panel be changed once every humidifying season. We find a majority of our customers do this maintenance typically at the start of the humidifying season.

Here are the things to check when troubleshooting a power humidifier, which is leaking:

1.Position Of Unit On Plenum
Is the unit level (let to right)?
Is it plumb (front to back)?

2.Feed Tube
Is the Feed Tube tightened or is there a crack in the tube?

3.Position Of Scale control insert-
Is the base of the scale control insert sitting firmly in the drain spud at the base of the housing?
Does the bottom of the scale control insert have a taper to it to direct water to the drain spud?
Is the Scale control insert positioned correctly? The scale control insert has a front and a back. The back of the water distribution tray has an indentation in it to allow for clearance of the nozzle, which is attached to the top of the base. If reversed, and forced into place, the water distribution tray will break off the nozzle attached to the water feed tube and potentially the housing, causing water to leak

4.Water Panel Assembly-
Are there aluminum strands hanging out of the scale control insert?
Is there a gap between the top of the water panel and the water distribution tray for air to go through?
Is the colored dot on the water panel, up?
Is there a consistent coating on the Water panel, or are there shinny spots or clumps of coating?

5.Water Entrainment (Water Blowing out of the Humidifier)-
Are there signs of entrainment? Mineral build-up on fan blade, shroud, inside of cover?
Is the static pressure in the plenum over .4w.c.? If so, entrainment and leaking could occur.

6.Missing Orifice
If there is no orifice in the unit, the water entering the system could flood the panel. To check
for proper water flow, a quart jar should fill at the drain line in about 2 ½ minutes for a red or blue orifice, 5 minutes for a white or yellow orifice.

7.Drain line-
Is the drain line plugged?
Does it have a good downward slope?
Is it teed with any other drain lines?

If the above items do not resolve the existing leaking we would recommend contacting the customer service line at 800-334-6011 for further technical support.

Regards,



Tracey Hadju
Customer Service Specialist
Research Products Corporation
www.aprilaire.com

Oct 25, 2010 | Aprilaire 700 Humidifier

1 Answer

Aprilaire 700 leaks water from bottom of case


Install new water panels yearly. On the new panel make sure that the painted dot on the edge of the panel is on the top when you install it.
Always clean the distribution tray and the frame. Make sure the notch on the edge of the distribution tray faces away from the furnace. Make sure the humidifier was installed level. Keep the drain tube opening clear. Insure there is no blockages in the drain tube.
Good luck
HVAC Teacher

Feb 10, 2009 | Aprilaire 700 Humidifier

1 Answer

Water runs when furnace is off, but stops when furnace is on.


the 760 humidifier does not need a transformer wired externally. the 760 has its' own 24v transformer inside the fan compartment. this transformer will provide the power to enrgize the water solenoid as needed. it sounds like to me the additional trasnformer is hot all the time. when the furnace comes on, the unit gets power and the internal transformer is cancelling the power from the external transformer. this would explain why it quits running when the heat is on. since the external transformer is hot all time, when the heat shuts off, the solenoid is getting energized by the external transformer. to make this run correctly, you need to get rid of the external transformer. leave the humidifier high voltage wires hooked up so they are only hot when the furnace runs. if you have a humidistat that has a r and c terminal, you will need to wire these directly to the r and c on the furnace control board and move the switch inside the humidistat to "power". make sure it is not on "bypass". then wire your 2 brown wires from the humidifier to each of the "h" terminals on the humidistat. if you have a humidistat that only has 2 terminals, wire one brown wire to each of the terminals. this should allow it to run properly.

Jan 28, 2009 | Aprilaire 700 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

Aprilaire model 760


It could be that the humidistat is not calling for humidity. Make sure that you have the dial turned up all the way (as far as it will go, just to test it) and that the blower on the furnace is running - if the unit is properly wired, the water will not run unless the blower on the furnace is running. This should do the trick. If not, the only other thing would be a bad humidistat. Good Luck!

Dec 14, 2008 | Aprilaire 550 Humidifier

1 Answer

Leaking humidifier


Check for an obstructed drain line.

Feb 28, 2008 | Aprilaire 700 Humidifier

1 Answer

Lots of water run-off from Aprilaire 760 Humidifier


HI would check the filter in side might need changing or cleaning clean out wter tray in side, it could be just a blocked filter , hope this helps

Jan 03, 2008 | Aprilaire 700 Humidifier

6 Answers

Water dripping from unit


if the water panel needs to be replaced , this can happen. instead of going through the panel , water will run on the outside of the panel and drip through the seems on the humidifier cover. make sure the plastic hose that goes into the water panel is inserted into the water panel.

Dec 27, 2007 | Aprilaire 700 Humidifier

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