I'm pretty sure I know the response but just thought I'd ask. I have a Halstead Trio Boiler. Probably best that I bullet point. - over 20 years old - was a reconditioned one when installed - it was working til last night - 4 radiators - 2 not been used for years - bled the used ones - was slowly working last night - hadn't turned off when bled (didn't know I had to) - now pressure not working and temperature only reached a maximum of 26° - filler loop seems ancient and unlike any pictures I've been able to find. Advice needed. Broke and can't afford new boiler. Absolutely freezing lol All help greatly appreciated