A Viessmann vitodens 100 boiler has begun to heat the radiators when on hot water only, causing it take along time,and alot of gas to heat the water to luke warm.
I'm assuming It's the step motor cartridge that's at fault, the question is . How do you remove the step motor cartridge from its housing ,
Iv'e removed the 2 screws but I can't budge it.
Has anyone got any Idea's.
Regards, Pez .
I'm assuming It's the step motor cartridge that's at fault, the question is . How do you remove the step motor cartridge from its housing ,
Iv'e removed the 2 screws but I can't budge it.
Has anyone got any Idea's.
Regards, Pez .