Original Aprilaire #4040 replacement solenoid valve. Note: Valve styles may vary.
24 VAC
2.3 Watts
Replacement solenoid value for Aprilaire Humidifier models 220, 224, 400, 440, 500, 550, 558, 560, 568, 600, 700, 760, 768. The #4040 soleniod valve includes a new inline strainer (pre-inserted in inlet side of valve), and a compression nut & washer for the inlet side only.
Solenoid Valve Replacement Instructions
For power units unplug electrical cord. For bypass units turn off power to furnace. Also turn the humidistat off.
Shut off water supply at the saddle valve
Disconnect inlet and outlet water compression nuts. Double wrench. Note, some water may drip on floor. Remove the orifice (which controls the water flow) from the plastic or copper tube and make sure there is no obstruction. If blocked clean or replace.
Remove the wire nuts from the water solenoid valve wire connections. Set aside.
Remove screws that secure valve to unit.
Attach new valve with screws. Do not over-torque screws into plastic housing.
Reconnect wires with wire nuts.
For units with plastic feed tubes inspect for brittleness, hairline cracks, nicks or abrasions, etc. Replace if necessary.
Reconnect the water lines, double wrenching the compression nuts.
Turn water back on and check system for leaks. Tighten compression nuts as necessary.
Restore electrical service and activate furnace by turning up the thermostat.
Turn up humidistat to verify operation of humidifier. Recheck for leaks. Turn down humidistat to make sure valve shuts off. Reset humidistat and thermostat to original levels.
I had been having trouble with my furnance humidifier for some time and finally started working on it myself rather than pay for an expensive service call, then for parts needed.
I found this site and lo and behold, I found a video which lead me to believe that the solenoid valve was bad. I figured this was a gamble, but since the video walked me through the process, I decided to give it a try. Cost was about $60.
It arrived and I put it on and it worked perfectly. I figured that I saved about a hundred dollars overall by doing it myself.
This is a great site to get both help and parts. I would highly recommend checking them out.
1/18/2012
4.0
Performs like new
By Larry G
from Hoffman Estates,Il
About Me Homeowner
Pros
Exact replacement part
Good Fit
Cons
Needs changing often
Not Durable
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
This part needs to be changed too often.
1/18/2012
5.0
Aprilaire 440 Solenoid Replacement part
By Caleb the handyman
from Naperville, IL
About Me Homeowner
Pros
Easy to install
Good Fit
Long Lasting
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
Excellent replacement part with less cost.
1/17/2012
5.0
Perfect fit.
By Mike
from Virginia
About Me Homeowner
Pros
Durable
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
Very useful
1/15/2012
5.0
Good Value
By Fixed_it
from Wisconsin
About Me Homeowner
Pros
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
Very easy install. Fit without issue. Will buy again in future when needed.
1/14/2012
5.0
Great replacement part
By Gary
from Chicago suburbs
About Me Homeowner
Pros
Easy to install
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
Very easy to install on my Aprilaire 220 whole house humidifer.
1/11/2012
5.0
A bang for the buck
By GauchoNY
from Woodside, NY
About Me Handyman
Pros
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
Purchased as a replacement of cracked real old valve. Outstanding it even came with a "O" ring and nut. Hyper fast delivery and the price that beats every other supplier. Thanks
1/9/2012
5.0
Exact OEM replacement part
By Loren
from Appleton, Wi.
About Me Handyman, Homeowner
Pros
Exact replacement
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
The exact right part, first time! Original OEM part made installation a snap. IAQ Source did us right with tha April Aire, Air exchange unit and thermostat when we did our HVAC upgrade a few years ago. When I needed a replacement water valve for our April Aire, IAQ was our first choice. 2 screws,2 water lines and 2 wires, then turn the power back on.
