Can anyone help me, please? I have a Grundfos HomeBooster unit installed but due to low pressure (some temporary freezing, possibly) the unit cut-out. I have installed the password (which I think is 0000 on to the screen in front of Unit) which has stopped the alarm continually ringing and the Unit shows it is on Standby ... but the pump is still not working. I have no hot water or heat (and haven't for two days). I have no handbook and I find the Grundfos website really unhelpful, the emergency call-out are not responding and I would like to look at a detailed manual to tell me what settings I should have. I can't actually get the screen to change from 'Standby' either. I am based in Devon. Any help would be more the appreciated as we are getting colder and reverting to 18th century hygiene. Many thanks. Joe