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Michael Shergold[_2_] Michael Shergold[_2_] is offline
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Default Premature failure of Promax boiler combustion chamber door seals anyone any ideas?

Re-posted with changed wording and corrected subject line
"Michael Shergold" wrote in message ...
The lower seal develops cracks and eventually leaks hot air into the airbox
causing the safety lockout to trip
http://s408.photobucket.com/albums/p...axDetail-1.jpg
Can anyone suggest why this happens, the top seal and side seals eventually
harden but stay sealing even after several years. The bottom seal seems to
start to crack as shown after a couple of months.
I am also awaiting a reply from Potterton Technical Service.
Michael