Hello all,
Am new to this, as in the past I've usually found the answer is past forum threads, this time its got me stumped though!
I've had two seperate engineers (£££'s) and new parts (pump, NRV, electrode block & blast tube) and the boiler will not run for any longer than 2-3 mins. Both engineers said the boiler had them beat and couldnt suggest anything other than replacing it.
Basically, to get the boiler to fire, I have to bleed the line - it fires up and i close the bleed screw, after a minute the burner starts to splutter so I open the bleed screw again, this lets out more air and the boiler continues to burn for another minute. If I don't open the bleed screw again a minute later, too much air builds up and the boiler goes to lock out.
I and the two engineers have replaced and checked all joints. The fuel line has been replaced and a NRV fitted. the boiler was setup originally as a two pipe system with a tiger loop, but is now a one pipe system (as reccommended by HRM).
You can visibly see a lot of air bubbles being sucked through the clear inlet pipe. Could this be a faulty fire valve, or is the pump knackered? Or is it something else? Oh yeah, there's about a fifth of a tank of oil there.
Any help would be much appreciated from you guys, as the missus keeps banging on about it and I've spent circa £400 so far!
Am new to this, as in the past I've usually found the answer is past forum threads, this time its got me stumped though!
I've had two seperate engineers (£££'s) and new parts (pump, NRV, electrode block & blast tube) and the boiler will not run for any longer than 2-3 mins. Both engineers said the boiler had them beat and couldnt suggest anything other than replacing it.
Basically, to get the boiler to fire, I have to bleed the line - it fires up and i close the bleed screw, after a minute the burner starts to splutter so I open the bleed screw again, this lets out more air and the boiler continues to burn for another minute. If I don't open the bleed screw again a minute later, too much air builds up and the boiler goes to lock out.
I and the two engineers have replaced and checked all joints. The fuel line has been replaced and a NRV fitted. the boiler was setup originally as a two pipe system with a tiger loop, but is now a one pipe system (as reccommended by HRM).
You can visibly see a lot of air bubbles being sucked through the clear inlet pipe. Could this be a faulty fire valve, or is the pump knackered? Or is it something else? Oh yeah, there's about a fifth of a tank of oil there.
Any help would be much appreciated from you guys, as the missus keeps banging on about it and I've spent circa £400 so far!