My boiler is with gravity fill so the bar is showing only 0.6 bars how can I increase the pressure as there are no filling loops any suggestion plz

sam, October 2010

You can't increase the pressure without raising the header tank (who fits a pressurised boiler with a header tank?)
The most likely answer will be the pump pressure sensor being faulty (possibly blocked), clean or replace, especially if it's a salmon pink one.

Carefree, October 2010