how do you adjust the pressure as its very low and in the red i.e. under half a bar. Boiler is lighting but central heating not working and water is not hot...also turned the dial up to max but still no difference.

Lee, November 2005

If you're talking low water pressure, I had the same problem. I increased the water pressure on my potterton lynx combi boiler by attaching a snake pipe to the water inlets, opened both taps to allow the water pressure to increase. Remember to close off both the taps once you've got the desired pressure.

C, March 2007