Have you thought of having the boiler fixed - or serviced - not the same thing?
By the way, if a Vitodens 200-W is found to be heavy, that may be seen as a measure of quality.
Someone told me it's not worth repairing, as the heat exchanger could be gone. It's 9 years old Modena 80E. I had to use reset button 3 times now to operate, otherwise it goes back to 'boiler lockout' light sign.
The reset does the job for the day...until the next day. I have gas engineer booked on Monday.