F10 indicates that there is a fault with the presure switch not sensing properly it could be due to the pipe to the switch being cloged or the presure switch bottle being cloged or even a duff switch although this is not commonly the problem. you should check the system for crap and if none is found get someone out pull the plug before doing anything and remember the fault codes are just an indication of a possible cause and could relate to other problems
zak
July 2005
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