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.
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Comments:
Everything is working now
By Jack Spratt from Downers Grove, IL on 2/4/2010
Pros:
Good Fit
Best Uses:
Whole House Humidifiers
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend
Comments aboutAprilaire #4040 Solenoid:
The product is just what I needed. Looks like they might have updated design from my original which was sticking closed and not letting water through. It only took a few minutes to replace the old one with this new one and everything is working great now.
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Comments:
I would buy this product again!
By John from Hillsborough New Jersey on 2/4/2010
Pros:
Durable, Long Lasting
Best Uses:
Whole House Humidifiers
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend
Comments aboutAprilaire #4040 Solenoid:
I owned an Aprilaire humidifier for over 15 years. The solenoid that was installed over 15 years ago finally stopped functioning (great longevity). I ordered a replacement solenoid, and it was easy to install, works perfect and I expect I'll get another 15 years + out of this one.
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Comments:
Solenoid Soliloquy
By jjken1 from Ann Arbor, MI on 2/4/2010
Pros:
Durable, Good Fit
Best Uses:
Whole House Humidifiers
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend
Comments aboutAprilaire #4040 Solenoid:
To replace or not to replace a faulty solenoid, that is the question. Whether my mental exercise in eliminating possibilities as to the working of the old solenoid is effective becomes moot if I just buy a new one and hope for the best. Alas, without equipment it is impossible to electrically verify the old solenoid; if it has failed, I must assume that 8 years is the taxable limit on such devices. So I'll buy the dang thing, hook it up and hope to avoid writing another review. - DONE. The new solenoid installed exactly as the old and works great. It would have been nice to have wire nuts included in the package however.
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Comments:
Good service
By JIm from Omaha on 2/1/2010
Pros:
Good Fit
Best Uses:
Whole House Humidifiers
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend
Comments aboutAprilaire #4040 Solenoid:
Good part but didn't include the filter strainer that was supposed to be included as per the the instructions.
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Comments:
Very satisfied
By Pat from Alexandria, VA on 2/1/2010
Pros:
Easy to install, Good Fit
Best Uses:
Whole House Humidifiers
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend
Comments aboutAprilaire #4040 Solenoid:
Arrived promptly, just as advertised, and easy to install. All at a fraction of the estimate from the local service/repair company.
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Comments:
Great Replacement
By Greg from Sandusky, OH on 1/31/2010
Pros:
Good Fit
Best Uses:
Whole House Humidifiers
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend
Comments aboutAprilaire #4040 Solenoid:
This is a great replacement, note that is came with a in-line strainer.
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Comments:
Right product for the problem. Good CS
By Dashword from West Chester, Ohio on 1/29/2010
Pros:
Good Fit, Time will tell
Cons:
No Cons
Best Uses:
Whole House Humidifiers
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend
Comments aboutAprilaire #4040 Solenoid:
Received timely. Saved $260 by installing myself.Easy to install. A/C company wanted $330 to install a part that cost [$].
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Comments:
[...] EASY INSTALLATION
By JIM from CHICAGO on 1/29/2010
Pros:
Easy to install, GOOD INSTRUCTIONS
Best Uses:
Whole House Humidifiers
Describe Yourself:
Homeowner
Bottom Line:
Yes, I would recommend this to a friend
Comments aboutAprilaire #4040 Solenoid:
PRODUCT WAS VERY EASY TO INSTALL AND IT WORKS JUST FINE. SAVED ATLEAST 150.00 IN PLUMBER FEES.
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