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Cheers guys, I'll drain some water off when I get back home and see if that makes any difference. Was talking to hubby and he confessed "yeah I thought I better re-pressurise it", when asked why if the pressure wasn't low he said "because it's the only way I know how to fix boilers"! :roll:

Thanks gasman and gas4you, that clears up the jumper settings for me. Had no idea the pump over run was that long though, just checked it again and the CH does indeed turn off after 6 mins. I've also noticed the water pressure is rather high. Currently at approx 2.5 bar rising to 3.2 when...

Hi guys, got a new PCB (the new orange one) and that has fixed the problem of the completely dead boiler. I now have another couple of problems though. Firstly, having ignited the boiler and then switching off the programmer (no longer demand for CH) the boiler display continues to display c...

18 month old isar HE35 broke down this morning. No hot water, no heating, it's not firing, no error codes and no lights. Checked power to unit, all seems ok and water is pressure normal. Only sign of life seems to be the "ticking" sound from diverter valve head actuator (red honeywell head...