Bryant humidifier problems.

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Old 01-20-15, 10:32 AM
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Bryant humidifier problems.

I am having problems with my humidifier. It will not work in automatic mode. The test mode will click and water will enter the water pad. Soon as you move it out of test, the system will not work. So I know the transformer and solenoid are working, the water tube is free of clogs. What else can I check. It worked perfectly last year, and of course it just went out of warranty at the start of 2014.

Furnace: Bryant Evolution Plus 90I
Humidifier: HUMBBLBP2417-A
Humidifier controller: Looks like the standard single dial model.
Thermostat: Bryant programmable, but looks like a very basic model.
Filter media: Large 5inch thick mass filter. Merv 11

Installed in early 2009 by one of the areas more reputable companies.
Only problem has been a leak in the AC core in 2012 that was replaced under warranty.
Any help or ideas would be appreciated. Thank you.
 
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Old 01-23-15, 05:38 PM
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It sounds like your humidistat may require replacement.

Can you provide a little more information?

What method are you using to place it under Test?

How is the control voltage connected to the furnace?

How many wires are running to the humidistat?

If you saw how the backside of a standard dial humidistat looks you might consider getting a new thermostat that can also control humidity. (After proving it is indeed the huimidistat)
 
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Old 01-29-15, 03:37 AM
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Can you provide a little more information?

What method are you using to place it under Test?
The dial at the upper limit has a test indication. Moving the dial completely to this location while calling for heat will turn the water on, and a green LED will flash on the panel.

How is the control voltage connected to the furnace?
No clue

How many wires are running to the humidistat?
Looks like 3. One to the Solenoid, one to the furnace and one to the 24volt transformer.
 

Last edited by PJmax; 01-29-15 at 08:53 AM. Reason: removed board added link
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Old 01-29-15, 08:55 AM
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What has us puzzled is that basic humidistats don't have an automatic or test setting. Usually they just have a dial marked in percentage.

If that humidistat only has two wires connecting it.... short them out. If the humidifier starts working.... the humidistat is defective.
 
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Old 01-29-15, 11:56 PM
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Here is a photo of the control panel. Located right next to the humidifier and above the furnace, on the return side.

Normally we adjust the dial till we start getting moisture on the windows, and then turn it down 1 number. In the past this has been around 4 or 5. To "test" if the system is working, you turn the dial all they way to the Test/Reset position. If I move it to that setting while its calling for heat, water will flow through the humidifier. Moving it back to the a normal setting, it will not function. I assume the test function is basically shorting out the system. As you can see there is 3 main wires heading into the control box.


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Old 01-30-15, 10:34 AM
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That is an automatic humidistat with outdoor monitoring. The cable on the right goes to an outdoor temperature sensor. The middle cable should connect to the humidifier and the left cable should be the 24vac power from the furnace.

It would appear that the humidistat is defective.
 
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