On Thu, 12 Feb 2004 04:45:41 +0000, Shabs wrote:

Inside my boiler is a Grundfos switch with a dial for numbers 1/2/3.
the boiler works fine when this is on 1 but if i switch it to 2 or 3
(which i assume will make the water hotter) the boiler will not turn
off if i run the central heating. it just constantly stays on
burning. However if i turn off the downstairs radiators it goes back
to it's stop-start usual self. The problem also is that the water
does not get any warmer with the switch at 2 or 3.

Does this dial control the water temperature? or any clues as to how i
would sort it out... many thanks guys

Almost always you set a combi boiler's internal pump to 3 (unless the
instruction say otherwise). Sometimes the instructions say that you may
turn it down but will have reduced water heating performance - which on
most installations would not be welcome.

This setting is how hard the the pump works.

To make the radiators hotter try the knob on the outside of the boiler!


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html