Hi, guys and gals.... I have a vaillant 937 in my house and recently the hot water has begun to feel colder, the outside water temperature of the mains has not even dropped that low yet? I have gas rated it and it is running about 35kw.... The system is clear and has a magnabooster fitted, I am at a bit of a loss now as to what could be causing the problem.
Any ideas?
Cheers Paul.
Is it normal to display 80deg on the display when running the hot tap, I think it is reading the flow thermistors temp but I'm not totally sure.
Any ideas?
Cheers Paul.
Is it normal to display 80deg on the display when running the hot tap, I think it is reading the flow thermistors temp but I'm not totally sure.