vailliant ecoTec 937 plus

[keltoyboy]

Any one had problems with the shunt pump on one of these..... is it fixable or will i have to bite the bullet and fit new one??

 

[Ermintrude]

Had a few dumps on 837
It's a new block as now takes a grunny pump. From memory 937 has alpha genes - touch it and it leaks

 

[mountainman]

I've only changed them, a real pain of a job.

 

[keltoyboy]

I've only changed them, a real pain of a job.

You change them with boiler on the wall or did it have to come off???