My girlfriend has one of these boilers which is 2-3 years old in a new build property. The timer unit on the boiler doesnt work (hasnt worked for the last year) so she can't have the central heating come on in the morning/evening at preset times. Several of the radiators are lukewarm at best.

She has been told that she needs to repressurise the system but is currently missing the relevant pipe (the system filling loop).

My questions are:
- do these boilers usually come with a guarantee?
- how expensive will it be to replace the timer unit?
- if she bleeds the radiators will this affect the boiler pressure (she is unable to repressure the system until she gets a replacement system filling loop).

Thanks in advance for any advice

Adam, November 2008

adam replacement timer about £30 to £40 could fit yourself only plugs in cannot vent radiators with out toping up water presure can get filling loop from any plumbers merchants max £10 unless you taken out extended warranty 2years max

jpd, September 2010

The pressure gage keeps going down to 0, and I keep having to top the system up?

Sally, September 2009

Why does my red light (ignition) keeps coming on after resetting?

Jayesh, January 2009

q1: since its new build id get onto builder and take it from there

q2: not much if its mechanical timer

q3: yes pressure will drop when bleeding rads. rad needs bled if its hot at bottom but cold at top. if its luke warm all over think it'll be a different problem

iain, November 2008