Honeywell 360 humidifier not working


Old 01-14-15, 03:26 PM
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Honeywell 360 humidifier not working

I have a 5 year old unit that has worked fine over the years. I turned the humistat up until it 'clicked', opened the saddle valve. When the heater started, the sail was forced down and the solenoid 'clicked'. OK! No water. Checked the hose from the saddle valve to the solenoid by taking the fitting off and holding it over a bucket. Water! My unit uses a mounted AC to 24 volt power supply. Checked with a volt meter, 27 volts.
Am I correct in my assumption that the sail switch is just a normally open switch and there isn't any other electronics involved, correct?
Also, after trying this for approximately 5 minutes, the solenoid body was slightly warm indicating current flow.
Based on the above scenario, I bought another solenoid valve. Wired it in, same problem! Help!
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Old 01-14-15, 03:44 PM
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Honeywell 360 not working

Just read your suggestion on this thread about a bad humidistat being the problem. I will try that tomorrow morning. Sounds like it will do the trick. What is in the humidistat?

Separated from...

Last edited by PJmax; 01-14-15 at 09:11 PM.
Old 01-14-15, 11:12 PM
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I combined your posts into your own thread. It's very confusing when a problem is spread into different threads.

A humidistat is just a single pole switch connected to a moisture sensing medium. The switch is small and light duty. Every time it opens it arcs from the solenoid opening. Over time the contacts get burned and no longer make contact.

You need to have your solenoid connected to power when checking the voltage right at the valve.

The humidistat and the sail switch are both nothing more than normally open switches. On a call for humidity..... the humidistat closes. When the blower starts.... the sail switch closes.

Last edited by PJmax; 01-15-15 at 12:02 AM.
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