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Posted by HeatPro on April 08, 2008 at 11:52:24:
In Reply to: Re: How would I purge air from hydroair system in attic? posted by Dave on April 08, 2008 at 08:11:00:
Contact sensitivity in the flow switch might be your issue. It's going to be chance coming across a switch that is reliable.
You might try a pressure differential switch with sealed contacts
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