Hello,
I have got open vented heating system with Glowworm Ultimate 50FF boiler. The system keeps tripping off now and then. The company which covers the boiler said its a stat problem and replaced it. This didn't fix the problem so later they said its a sludge problem and asked me to get it power flushed. I cleaned the system with the Fernox cleaner and with DS-40 but the problem isn't resolved. Now, I have lost trust on the engineers coming from the company. I have emptied the system a number of times and bleed the radiators as well but still no luck. Can anybody point me in the right direction?

Kris, December 2007

if your pump is faulty , as they do loose power over time , then it trips

turn the speed up to 3 on the pump , see if it helps or get a new one £35 from screwfix

jase, February 2009

In what way is it tripping off?? is it tripping the mains?? or is the little red over heat button at the bottom popping??

daren your help, December 2007

if the system is sludged your not likelly to remove it just by draining the system, adding a chemical then draining it, a powerflush will remove most of the muck from the system but will cost a substantial ammount to have done, what also may be req'd is a repipe in the airing cupboard depending on how caked the pipework is! an good test to see how bad the system is sludged is get a strong ish magnet and check the pipes above and below the pump and see if you get any pulling on the magnet, if you can feel it theres muck in there!

what company have you lost faith with?

Kev!, December 2007