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Posted to uk.d-i-y
Neil
 
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Default Retensioning Henderson Merlin canopy garage door

My garage door spring needs retensioning as its reluctant to reach the fully
open position without the aid of a good shove. Replacement parts and
specialist tools to do the job are easily available online. I would
appreciate some pointers as to how its done - the prospect of the horizontal
spring unwinding whilst my fingers are in close proximity doesnt sound too
appealing. Many thanks

Neil