Intermittent fault with garage door opener

Joined
29 Nov 2010
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Location
Surrey
Country
United Kingdom
I have a double up and over garage door powered by a Hormann motor.
When operated the door will open by a few inches and then stop. On other (rare) occasions the door will fully open without stopping.
Could this intermittent issue be a problem with the sensor detecting a non existent obstruction?
Thanks

Whoops! Now re-posted in uk electrics.
 
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