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Posted on Apr 22, 2008

Air King Wait 5000 Humidifier will not always shut off water when furnace fan stops....tried all troubleshooting tips in manual.....worked O.K. the first winter....cleaned the furnace filter, replaced the evaporator pad....tried all 3 dip-switch settings for water not shutting off....replaced the solenoid.....NOW WHAT? ....don't want to spend $90.00 hr. for a plumber yet......

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  • Anonymous Oct 22, 2008

    Same issue...what is the fix?

  • Anonymous Nov 16, 2008

    Same problem - eventually leaks like crazy and I have to turn it off

  • scooterboi Dec 02, 2008

    Same problem. The only thing that will shut the water off is to turn down the humidistat to 10% - not a solution. I have an extra wire (female connector) coming out of the hudifier that I think might be part of the issue.

  • Anonymous Jan 13, 2009

    water keeps flowing it does not stop when furnace is off

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  • Posted on Jan 09, 2010
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My air king 5000 does not go on no green led light comes on it came on the first time i hooked it up and no more after that

  • Sandra m
    Sandra m Feb 09, 2019

    Did you fix this problem I am having the same issue

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  • Posted on Dec 11, 2009
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Yes, I have a solution ! I had this problem and tried all the dip switch settings mentioned in the manual. Eventually I just watched the heating cycle to see what was going on. It did all work properly, the heat came on, the water came on, the heat went off and the water went off when the air cooled off. But the fan continues to run until the furnace is completely cool. A little while after the fan stopped the humidifier water supply came on again and stayed on till the next cycle. Eventually I figured out what was happening was that residual heat from the furnace was drifting back through the supply duct and was warm enough to re-trigger the temperature switch that turns the water on. The solution is simple. Close down the control blade of the duct on the hot air side to about 50% Now there is less likelyhood of warm air drifting back and re-triggering the flow valve. I don't recall of any mention in the manual of how to set this blade control so I guess most people leave it wide open. Anyway, this worked for me.

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  • Posted on Jan 29, 2010
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I just fixed mine. Remove the solenoid and coil from the unit. Disconnect the 24VAC electrical and plumbing etc. remove the lock from the coil (black part). Its a "U" shaped clip device. This should allow the solenoid to come free. Remove the two screws from the base of the solenoid. Now the armature pin should come out. Inspect the base (within the solenoid). It has a raised "nipple" where the rubber of the armature "seats" itself. In my case, it had disintegrated on one side, causing a bad seal when the armature was "closed". Take a small grinder tool and very carefully, grind this (nipple within the solenoid base) so you have an even "face" for the rubber piece of the armature to "seat" against. Reassemble...
enjoy 1) not pouring water down the drain 2) teaching yourself a bit about solenoid valves etc 3) getting to play with your tools. 4) not spending $60+ for a new one of these things 5) experience in knowing how to disassemble/fix it the next time
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  • Posted on Dec 29, 2008
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Http://www.airkinglimited.com/airking/admin/article_instructions/5000IO.pdf

Here's a link to the install manual.

Check out the section on setting the dip switches, it may help.

  • Anonymous Dec 29, 2008

    The link I posted before is not exactly what I thought it was but it still may be of use.



    If I find the actual manula I'm looking for I will pass it along.

  • Anonymous Jan 19, 2013

    yes, apparently for mine and most furnaces, the middle one should be one and the others off. but even then i seem to need to set it to above 50% to go on at all. i will check the selenoid.

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I had same problem and found solenoid valve was fault. What was the valve seat was corroded so bud plunger was not able to shut water off. need to replace solenoid valve assembly. Or buy new one!? Tom

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  • Posted on Dec 05, 2009
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While installing the Wait 5000 Humidifier, can you use the 24 volt transformer from the previous Humidifier or do you have to use the transformers provided with the Humidifier

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Related Questions:

1helpful
2answers

The humidifier was running.Because water lecel was low. I filled it as usual. Now it doesn't run. Why

There could be several reasons why a humidifier stops running after refilling it with water. One of the most common reasons is that the humidifier's float switch is stuck in the "low water" position, which prevents the humidifier from turning on even after refilling it with water . Another reason could be that the humidifier's water level sensor is malfunctioning, which causes the humidifier to stop running even when there is enough water in the tank/

If you have a whole-house humidifier, it could be that the humidistat is set too low, which causes the humidifier to turn off even when there is enough water in the tank 1. Alternatively, if you have a portable humidifier, it could be that the unit's motor has burned out or that its fan has stopped working .

To troubleshoot this issue, you can try cleaning the float switch or replacing the water level sensor if they are damaged. If you have a whole-house humidifier, you can try adjusting the humidistat to a higher setting. If you have a portable humidifier, you can try replacing its motor or fan
Oct 14, 2023 • Humidifiers
0helpful
1answer

Wait5000 humidifier problem

How it is wired makes a difference and we dont know if it has its own transformer or it's taking power from the air handler or the furnace transformer / control board.
Feb 08, 2022 • Humidifiers
0helpful
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Furnace mounted humidifier when set thermostat to operate automatically it kicks the solenoid on but when the furnace shuts off the solenoid stays on When I turn it off at the thermostat it shuts off

Without knowing the exact humidifier and how it's wired one can only guess.

There are many different ways to wire a humidifier, one method involves the use of a current sensing relay monitoring the operation of the furnace fan motor. Another uses the HUM terminals on the furnace to control the humidifier.

Has the humidifier ever worked properly? If so, a component has failed. If not, it wired incorrectly and you need to refer back to your installation manual.
Oct 28, 2016 • Humidifiers
0helpful
1answer

Humidifier light goes on. Fan does not work after cleaning it.

Humidifier Fan Not Working - Repair Parts - RepairClinic.com

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Troubleshoot and Repair a furnace mounted Humidifier

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InstructablesThis instructable will explain how to diagnose and, hopefully, repair a broken ... to flow through the water panel of the humidifier and the humidifier fan turns on. .... drain line was dry, GFI was not tripped, and the fan sounded like it was going so I ... Arduino · Intel IoT · Indoor Gardening · Lighting · Sewing · Parties · Star Wars.
0helpful
1answer

Honeywell HE260 leaks somewhere

Neither, even if the solenoid or humidistat stick, it should always drain properly. Is the unit mounted on the cold air return duct or the supply plenum? If it's mounted on the supply plenum, the water panel might be getting blown forward and spilling the water. High efficient furnaces also can leak water on the floor if its drain is restricted. If hum. is mounted on return duct make sure drain is clear by blowing through it. On Honeywell hum's I've seen the rubber hose from the solenoid valve to the distributor tray leak too, check the rubber 1/4" hose.
0helpful
1answer

Aprilaire 550 makes extremely loud grinding noise when turned on

yes it should be bypass but solenoid could be trying to open but the voltage to it may be to low if you have 24v ac power at the 2 small wires. but to change shut down power to furnace and water to humidifier.you loosen the 2 compression nuts unwire they cant be reversed so dont worry then 2 mounting screws then reverse to install
0helpful
1answer

Fan shuts off too soon after oil burner stops

That is an old style t-stat i would replace it with a more up to date model. Your problem may be in the limit switch. But yes to answer your question most fans can be adjusted just depends on if it has a manual limit that looks like a silver box on the interior of your furnace or if it has a mother board control system.
2helpful
2answers

Aprilaire 600 Humidifier

J-

I had this problem several years ago. In order for the water to flow, the outside temperature sending unit must indicate to the controller that it is less than 60F. If not, the unit will not operate outside of test mode. Check the temp outside where your sending unit is (could the sun be heating that side of the house?) and ensure that the circuit to the sending unit is working. I had a bad wire splice inside a wire nut stopping the circuit. Took me a long while to figure it out.

If the outside temp and your sending unit circuit is ok, I wish you luck on your troubleshooting.

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