Roller Garage Door Motor Replacement ?

[Aletank]

I have 2004 Cardale Thermaglide electric roller garage door, never had a problem until now. Tonight it wouldn't raise past maybe 4 inches and the motor makes a buzzing sound. If I give it a helping hand it moves a few more inches then stops again, once over halfway up it goes itself then, coming down is no problem
I'm guessing the motor has gone, It's a tubular motor.
Has anyone had the same problem ? Is it a DIY fix/replacement ? I'm guessing the shutter would have to come off.
What would one cost to have it all fitted by someone/a company ?
Are some motors better than others ?
Thanks for any advice !

 

[NOMONEYBUTAMERC]

Speak to Cardale , they have a helpline and are sure to be conversant with this problem. may just be a damaged roller causing the motor to trip rather than tear up the door.

 

[m80]

You might check the bump starty capacitor, I replaced mine for about £4.75 from eBay and that sorted it.
A multi meter with capacitor range could see if the reading matches the capacitor rating.

 

[MikeInWimbledon]

First reaction is that it's a jam causing the motor to jam, and "trip" out of action. Think of something similar to the device that stops your side windows slicing the head off a child. Look to see if there's any kind of blockage stopping the roller from moving, and see if lubrication is needed to the basic roller mechanism (not the motor).

 

[Aletank]

Thanks for the replies ! It worked ok this morning.
When it was stopping yesterday it was making a buzzing sound like it was trying and when I gave it a helping hand it went up.
I'll give it a clean tomorrow and have a look over it

 

[Aletank]

Seems to be working fine now ! I've just been out and gave it a good clean inside n out, couldn't see nothing untoward and no where really to lube it etc. The manual says to just give it a wipe over with a wet cloth, no mention of lube etc.
I'll be keeping a close eye on it now, thanks for all your thoughts/ideas !