Question about Carrier LFP Humidifier

1 Answer

No Water when Humidifier Runs

The water supply is turned on. Maybe the electric valve on the top of the hunidifier is not opening.

Posted by on

  • Anonymous Dec 09, 2007

    water is definitely flowing from the saddle valve into the valve on top of the unit but flow when the humidifier is running. i suppose something could be plugged up with calcium deposits somewhere, or is it more likely the solenoid valve needs to be relaced?



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

I had the same problem and thought the solenoid valve was bad and was about to spend $80 for a new one. Until I took the short pipe (between the solenoid valve and humidifier) off and found that the orifice was plugged.  I used a sewing pin and cleared out the hole.  Problem solved.  I usually have to clean the orifice in the fall when I turn the heat on for the first time.

Posted on Jan 29, 2008


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

Water leaking / running from top of humidifier

humidifiers have a drain and if there is water going in it will be coming out the drain. check drain to see if it is clear, check hoses going into top of humidifier for cracks, check filter in humidifier.

Feb 05, 2014 | AutoFlo 250 Humidifier

1 Answer

What happens if the humidifier runs out of water? Humidifier is new and working fine. I Does the humidifier shut off automatically when it runs out of water?

The humidifier has a float valve in it much like a toilet tank does. If the water gets to low, the float valve should allow more water to enter the tank automatically. When it reaches the proper level, the float valve stops the water. The water line (either copper or plastic) coming into the humidifier should have a shutoff valve on it. Make sure that it is turned on.

Feb 02, 2011 | Holmes Products HM4600-U 11 Gallon...

1 Answer

760 aprilaire humidifier does not let water to the filter. I have cleaned and checked the lines in and out of solenoid.

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Your Aprilaire Humidifier is designed to operate in conjunction with your furnace blower motor. Most installers wire a humidifier to operate when the furnace is calling for heat. To determine if your Aprilaire Humidifier is maintaining proper humidity, turn up the heat temperature 5 degrees above the current room temperature on your thermostat and set your humidifier control to call for humidity. The humidifier control is located on the cold air return duct. To set your humidifier control to call for humidity, turn the control dial to the off position and slowly rotate the dial until you hear a “click” on the control. You should also hear a click at the solenoid valve located on your Aprilaire unit. The humidifier control will have a click point at the current relative humidity level in your home. If the current relative humidity is 45% or the outdoor temperature is above 60F, the control will only operate the humidifier in the test mode.
Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}
  1. No click at the solenoid valve indicates an electrical problem. Contact your heating and air conditioning dealer to further check the electrical components of your Aprilaire Humidifier.

  1. The click sound at the solenoid valve indicates there is electricity to the solenoid valve. By turning the dial of your humidifier control to a setting above the “click point” you should see water coming out of the drain line within a few minutes which would indicate your humidifier is working.

  1. If the solenoid valve makes a click sound and there is no water draining from the unit, this would indicate the flow of water is being obstructed.

1. To determine if water flow is being obstructed, turn the dial of your humidifier control to the off position. The first location you would want to check for an obstruction would be at the saddle valve located on the water line supplying water to the humidifier. When checking the saddle valve, you want to make sure it is completely open. This can be done by turning the valve all the way to the left. If anything is clogged, it can be dislodged by turning the saddle valve all the way to the right and back to the left. Once this is done, turn the humidifier control dial above the click point and you should see water coming out the drain line.

If water is still not coming out of the drain, check the orifice and in-line strainer to make sure they are not clogged. The orifice is located in the tube on the discharge side of the solenoid valve and the in-line strainer is located on the inlet side of the solenoid valve. You may clear the orifice by inserting a needle through the small opening. Clean the strainer by running it under warm water to dislodge deposits or replace. After clearing and re-installing the orifice and strainer (be sure to double wrench all water connections), turn the humidifier control dial above the click point and you should see water coming out the drain line.

Mar 10, 2010 | Aprilaire Humidifiers

1 Answer

Our aprilaire humidifier is only 4 years old and it does not seem to be working. We have static in the house and when I did test mode it never drained water like it was supposed to. Any ideas what I can do...

Hope this helps, check and see if humidistat is set to 35% humidity and that bypass damper on humidifier is in the open position or winter position.(humidistat is usually located on cold air return duct near furnace). Next, replace humidifier media pad, remember to replace media pad (filter) annually, you also may want to clean any lime deposit out of humidifier housing with a solution of warm water and white vinegar before installing your new media filter.Remember to turn power off at side of furnace when cleaning humidifier and replacing media. Before installing new media turn power back on to furnace, set humidistat to the on position, turn furnace thermostat above room temp., and inspect humidifier to see if water is running from top,(you may want to have a bucket under humidifier when checking for water), if you see water running, turn power back off to furnace, properly install new media filter, reconnect humidifier cover & set humidistat to 35%. If you do not see water present, check water supply valve to humidifier and make sure its turned on. If water supply valve is open, then check water supply tubing for blockage.And the last things to check is to make sure all registers through out your home are open and not blocked by any objects, also make sure furnace filter is cleaned, if none of this works refer to installation manual to see if humidifier was sized and installed properly, Good luck.

Mar 03, 2010 | Aprilaire 600 Humidifier

1 Answer

Aprilair 760 Humidfier will not stop water flow to EV panel

If the water continues runs nonstop even when the heater is turned off, you might have either a bad solenoid valve or a bad humidistat. Simply disconnect one of the two low voltage wires going into the unit. If the water turns off then your problem is most likely your humidistat or the low voltage wiring. If the water continues to run even when the low voltage is disconnected you have a defective solenoid valve.
Good luck.......

Apr 09, 2009 | Aprilaire 700 Humidifier

1 Answer

Water does not get to Humidifier. Goes from source to motor.

That is not a 'motor' on the side of the humidifier housing, it is a solenoid valve. The water feeds in to one side and exits the other side to a tube that feeds in to the top of the humidifier unit. The valve opens and allows water to flow when electrical power is applied to the valve

The valve electircal requirement may be either 120 vac or 24 vac. Power typically is switched on and off by a Humidistat control. The power feed to the Humidistat may come from a small transformer if the valve is a 24 vac unit, or directly from a furnace connection if the valve is a 120 vac unit. There are many variations, though.

A qualified licensed eletrician should check the power feed to the valve. If there is no power feed to the valve then he can trace back to the point of failure and correct the issue ... but he must also check for additional issues with the valve itself, as noted below.

Other possibles reasons for solenoid valve failure:

If power feed to the valve tests ok, then the coil inside the solenoid may be 'open' (bad, no continuity). The electrician can test the coil by checking resistance or continuity of the coil.

A non-electrical problem is that the valve path may be blocked by hardwater mineral build-up or other foreign material that flowed through the water line.

The solenoid valve must be replaced if either of the above is true with your valve.

Remember, use only a quailified licensed electrician!

Nov 24, 2008 | General Filters 1042-LH Humidifier

1 Answer

No Water flow thru Humidifier

Loosen the brass fitting where it connects to the soleniod valve. If water comes out your saddle valve is ok. Carefully retighten this fitting. With the humidifier turned on loosen the first fitting down stream from the valve see if water comes out. if it does turn the humidifier off and see if it stops, it should. That will tell you the the valve is ok then, just clean the filter and the oriface. if it does not turn on and off check the wiring. if ok replace the valve.
Good luck

Nov 22, 2008 | Honeywell HE365 Humidifier

1 Answer

I have the HE265B By-Pass Flow-Through Hunidifiers installed in the summer, but it never on, until this fall, I tried to turn, but no water flow through. How can I test it? The contractor is NOT...

first break or loosen the water line connection at the humidifier and if you get water then you know it is something else. While the heat is running and main blower is also running, turn the humidistat from low to high; if you hear a click in the solenoid valve (where you checked the water) then you know it has power and the humidistat works. anything deyond that call a good contractor.

Nov 21, 2008 | Honeywell Power Humidifier: Furnace...

1 Answer

Water not running through humidifier

Sounds as if you feel the problem is the saddle valve. Check to see if water is available at the humidifier. Close the saddle valve, disconnect the water line at the humidifier side, then slowly turn the saddle valve back on. If you never see water, then correct the saddle valve. You can get details here:
If you are getting water, but dont think that the unit is operating try sending 24VAC directly to the hunidifier and see if it operates, bypass the humidistat etc.

Dec 08, 2007 | Honeywell HE220A1019 Whole House...

1 Answer

Hunidifier doesn't add enough moisture to air

here is the link to the manual for the w7 - they suggest a replacement wick filter would solve the problem due to bacteria or mineral build up - i would expect this to solve your problem as the only way these wicks can not soak up the water to the top is if they are clogged or the tank is empty. try the cleaning routine on page 9 first - might be enough but the wicks probably will need replacing soon anyway. Hope this helps :)

Mar 08, 2007 | Bionaire W7 Humidifier

Not finding what you are looking for?
Carrier LFP Humidifier Logo

Related Topics:

1,037 people viewed this question

Ask a Question

Usually answered in minutes!

Top Carrier Humidifiers Experts

Paul Carew

Level 3 Expert

3182 Answers

Mack Baxter

Level 3 Expert

383 Answers

Tom Chichester

Level 3 Expert

40527 Answers

Are you a Carrier Humidifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides