When I turn my heating on it goes even higher up to 2.6, then I turn it off and it takes a long time (2 days) to go back to 1.9. I don't understand if it is leaking why is the pressure not dropping. Does anyone know what it might be and how much to repair?

Natalie Stinson, April 2007

Shouldn't the pressure be set at about 1.0 ???

Tom, February 2009

my glow worm leaks it is just the yellow cap on the condensate, the pressure just goes up and down doe to the heat off heating the radiators on mine,if this is the case with yours and you find out were to get the caps please let me know thanks ian

ian, May 2008

check that your filling loop(blue nob is turned off compleatly.

faz, October 2007

check that your filling loop(blue nob is turned off compleatly.

faz, October 2007

Mine is leaking as well from the flow sensor. You need to know where the leak is coming from as there are 2 different water curcuits. The pressure display on the panel refers to the central heating which is a closed curcuit, when it heats up the water expands and the pressure increases, depending on the amount of water in the system (number and size of radiators) and the temp in the house it may take a long time for the water to cool back down. As the pressure is not falling i would assume that the leak is in the hot water system which is connected to the cold water supply and so is constantly fed (this is where i have the leak) my leak is appears to be due to a rubber o ring failure but i don't know about yours.

Sutton, April 2007