At night pressure drops right off and the red flashing light always appears in the morning. Once i press the start up button(red light) it fires up and starts ok.
I was told to look outside for a leak, but no dripping. Its just a hassle i have to walk down stairs everymorning to fire up. Is there an easy answer? Is it the timer? I end up filling the boiler up every week. This has only started since Autumn has arrived and i put the boiler back on timer. Hope someone canhelp.
Cheers
Andy

Andy, November 2009

Hi Doc

Your a top man Top man. Thats what i was told. going to cost me £90 for Part and approx £100 to fit! Knightmare...but what can you do? Thanks for your advice.
Andy

Andy, November 2009

Hi Guys,
Experienced the same thing a couple of months ago and it was the expansion vessel. I am reliably informed that this is a common fault on worcester-bosch. However, the good news is that it is not expensive to replace ( 170 bucks all in ) which is good value since it does take a couple of hours to replace and will last for 3 plus years. Bearing in mind, I purchased the boiler 5 years ago and this is the first issue I have had with it, this is not bad. By the way, my model is a 28 CDi. Also, you mention no leaks. If you take a look at the overflow from the boiler to the outside of the house, you will notice shortly after filling the boiler that wtaer starts to drip from the overflow pipe. This is where the water empties from your boiler hence you will not find any leaks in the house. Does the boiler fire up when you fill it or is it just not firing up?

Doc, November 2009

Have a worcester bosch greenstar HE 11-35(about 6 years old). Same issues. Loseing pressure but no obvious leaks from piping. Pressure will last around 4 hours before dropping to zero. Been topping it now snce we moved into the house about 3 months. Also keep on getting an intermittant code EA, No flame detected. Its not lieing..There is sparking occuring but it seemsno gas as there is no light up through the little window??
Any ideas.

andrew h, November 2009