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.
When my old solenoid died, I remembered your company, as I had used you before for a kit to renew my humidifier. I ordered the solenoid. I received it faster than I thought I would and found that the installation process was very easy. It is now providing the proper water flow though my humidifier. I am very satisfied with the solenoid.
2/7/2013
5.0
Easy to instal
By Jerry ;the retired one
from Loudon, Tennessee
About Me Homeowner
Pros
Durable
Good Fit
Long Lasting
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
While I thought it would stop my water hammer, it did not. I get water hammer eveytime the humidfier turns off (selenoid closes). So my problem was not fixed but the new selenoid appears to be working, ie on and off(just before the furnace fan stops.
1/29/2013
5.0
I would buy this product again.
By Don the Handyman.
from Fredericksburg, VA
About Me Handyman, Renter
Pros
Durable
Energy Efficient
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
Easy to install
1/23/2013
5.0
Easy Installation
By Shockedfan
from Rochester, NY
About Me Homeowner
Pros
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
Fit was exactly like the old solenoid. 15 minutes start to finish.
1/7/2013
5.0
Would buy again, works great
By John
from Waterloo, Iowa
About Me Handyman, Homeowner
Pros
Durable
Works great
Cons
Best Uses
Comments about Aprilaire #4040 Solenoid:
Easy Install
1/3/2013
5.0
Excellent choice
By Dano
from Washington State
About Me Handyman, Homeowner
Pros
Durable
Good Fit
Right Part
Cons
Best Uses
Regulates Water Flow
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
Our Aprilaire whole home humidifier is located in the laundry room downstairs. One day I was going to change out the filter when I noticed the water was running constantly. I shut off the supply line and researched it online and found the most reported problem seemed to be that the water flow solenoid was bad. I ordered the part, it came in on time, it was really really easy to install. Just disconnect the wiring, removed the old one, installed the new one (five minutes) tightened it down and reconnected the wires. Our humidifier runs fine now. Directions in the box were easy to follow too. Anyway, I'm a happy customer.
1/1/2013
3.0
missing inline filter
By mrfixit
from ny
Comments about Aprilaire #4040 Solenoid:
I thought the solenoid would come with the in line filter, but it did not. Not sure if I should install this without the filter. a responce from aprilaire would be appreiciated. From your web site, I was not sure if this was the replacement part for the aprilaire 330. Some sites say yes, and some say no.
12/22/2012
5.0
wouldld highly buy from this company
By jimmy the saint
from Brunswick,Ohio
About Me Homeowner
Pros
Durable
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
service was incredable the part was a perfect fit usefull other reviewss / comments help me fix my humidifer myself. overall saved me about $75.00 doing it myself alot of products you can fix yourself you just need to read up on the product your fixing
12/10/2012
5.0
Aprilaire solenoid valve
By JPA
from Saratoga,ny
About Me Homeowner
Pros
Good Fit
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
perfect replacement part - easy instalation fast delivery
4/3/2012
5.0
Exactly what I needed and ordered
By Jeff
from Ohio
About Me Homeowner
Pros
Durable
Energy Efficient
Good Fit
Long Lasting
Cons
None
Best Uses
Whole House Humidifiers
Comments about Aprilaire #4040 Solenoid:
The Aprilaire #4040 replacement solenoid valve is exactly what I needed and ordered.
