View single post by darnold
 Posted: Friday Jul 12th, 2019 06:09 pm
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Joined: Thursday Feb 26th, 2009
Location: United Kingdom
Posts: 19

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I have two DM02 boards in my ComfortII system.  They have worked fine for many years.  Recently I have had some strange behaviour on one of the DM02 boards.  
I wanted to see if there is a way to test that it is functioning properly or do I need to replace it.  
When I press the SW2 switch on the board it is very slow to respond.  Sometimes if fails to ring the telephone.  Before replacing it, I just want to make sure that the board is in fact bad.

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