Question about Aprilaire 700 Humidifier

2 Answers

Aprilaire 700 Hi,I just recently purchased a home that came with the Aprilaire 700. I noticed that my ejector pump hose was running through the attic and then going down the wall. I was concerned if the water was really going into a drain or not so I pulled the hose out of the wall. I cut the 25 foot hose down to 6 foot and put it into a bucket to monitor the water activity. Here is my question/concern:My humidistate is 1-7. If my number is set to 1,2,3,4,5, nothing happens. Once I reach 6,or 7 I hear a click and then the humidifier clicks on. Once the humidifier is on the water seems to flow very fast. My ejector pump is constantly running and it takes no time to fill a 5 gallon bucket. Is this normal? It seems like I am wasting a lot of water. Can the water solinoid be turned down a little? How many gallons of water should this unit consume daily?How do I know the humidity level in my home? is there a readig somewhere?Thank you, Tim

Posted by on


2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

Download a copy of the Owner's Manual if you don't have one. Follow the instructions on page 5 to determine the RH in your house. A purchased gauge is a good idea only if you buy a Very good one ( $50 + ) since measuring RH is difficult at best. Your unit is turning on only when it's just above the RH in the house or where the sensor says it should based upon the outside air temp. Make sure that sensor is not near another air outlet or covered with snow, ice or any kind of obstruction to not allow it to give an accurate reading of the outside air temp. Also make sure its not resting against a warmer or colder than air surface. The outlet line from your solenoid has a blue orifice restrictor in it or should have. See page 10. This will only allow a VERY small mount of water through it even at 65 psig. Yours sounds excessive and I can't imagine that you don't have water running all over the place if its discharging that much. About a glass full every 3-4 minutes would be a lot. Make sure the orifice restrictor is there as well as the strainer in the inlet. The owners manual will tell you not to turn the flow down so I wouldn't do that if you have all the other factory components in place. Good luck,


Posted on Jan 15, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer


I suggest that you buy a hunidity gauge from Home depot. The one that I bought gives you both Temp. and hunidity and only costs a few bucks.

I am not sure but if you have an outside temperature sensor it may be to do with that as the temp may not be low enough to allow water flow before you reach the higher settings.


Posted on Nov 19, 2007


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have aprilaire 700 humidifier, running nonstop with fan on. and still cant get the humidity above 16%. 3000sq. ft. home

Hi check out the stat is working also check water line valve is not stuck open or there is some thing stuck on the seating

Feb 17, 2010 | Aprilaire 550 Humidifier

2 Answers

House is dry though it's quite cold outside and furnace is running. Aprilaire is turned up to 35 (I have a dial, not a digital panel). the water panel is completely dry (should it be?)

unless the humidty in your home is higher then 35%. if it is then the humidifier would not run. try turning it up higher and see if it comes on. Do you hear a click in the humidistat? as you turn up the dail when you hear the click is when the humidifier should come on. Also remember your furnace must be running for the humidifier to come on. if you hear the click and the humidifier fan comes on but no water, you may have a clogged inline filter located in the solinoid valve or a bad soliniod. all parts for your humifier can be purchased from

Feb 05, 2010 | Aprilaire 700 Humidifier

1 Answer

I need to change my Aprilaire 700 from *automatic* to *manual

Hi google aprillaire you can donwload manuals for this

Jan 09, 2010 | Aprilaire 700 Humidifier

1 Answer

My Aprilaire 700 does not seem to be working. The

you can bypass the humidistat by shorting the 2 brown wires on the bottom of the humidifier. just remove the 2 wire nuts and touch the 2 together (just 24v)if it comes on then there is a control problem with the humidistat or wiring if it doesnt come on the control board or transformer may be bad or you dont have 120v to the humidifier on the plug. also make sure your furnace blower is running cause the hum cant come on if its wired properly unless the fan is running. you also may want to go to and get a maintenace kit from their online store. it comes with pad and new hose along with a couple other things.

Nov 24, 2009 | Aprilaire 700 Humidifier

1 Answer

Water is leaking out of it

purchase a maintenance kit from aprilaire. this needs to be done annually.

Oct 13, 2009 | Aprilaire 700 Humidifier

1 Answer

New Aprilaire 700 - loud hi pitched whistle

You may be having problem with air scaping from the base of the hum. it will probably may have to put silicone around the base of the hum. to stop the air scaping.

Feb 05, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilaire Model 700 - not achieving 40% humidity

if it is set up right, you should be able to run your fan 100% of the time and the humidifier will come on when there is a need for humidity. you can experiment with leaving the fan on and see if this helps. it will run your electric bill up a little and also you will have a lot of waste water. that is a drawback to the bypass type humidifiers. also a factor is if the water supply is hooked up to the hot or cold side. it will humidify better on the hot side, but you tend to get more deposits that plug the solenoid over time and you will be running your water heater quite a bit. 1600 sqft may be pushing the limit of this humidifier.

Jan 24, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilaire 700 operating at wrong time

You want the humidifier to run in heat mode which is the r-w1 terminal on the stat.

Nov 17, 2008 | Aprilaire 700 Humidifier

1 Answer

Unpleasnt odor

After awhile, the drain hose gets caked up. Easy to replace.

Dec 03, 2007 | Aprilaire 700 Humidifier

Not finding what you are looking for?
Aprilaire 700 Humidifier Logo

207 people viewed this question

Ask a Question

Usually answered in minutes!

Top Aprilaire Humidifiers Experts

Paul Carew

Level 3 Expert

3173 Answers


Level 3 Expert

744 Answers

Mack Baxter

Level 3 Expert

383 Answers

Are you an Aprilaire Humidifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides