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Can you drain the entire system by opening up just one (the lowest?) valve on the lowest radiator (also presumably one other valve to let air in)? or do you need to drain each rad individually?

I suppose there's a few questions. I have (in my mind) divided the operation into two steps - firstly adding the cleaner, by draining about 1.5L of water from a single low point in the pipework (living room), then secondly (after a few days), draining and re filling with inhibitor. Presumably I...

well - no. I moved into the property Oct 2024, I have no idea what state the water inside the pipework is like and no idea what condition the radiators are in (although they all seem to be heating up with no apparent cold spots [he says, current situation]). "prevention better than cure" type...

Hi, possibly newb question I guess. Basically just want to add some cleaner to the heating pipework system, leave it for 24/48 hours to circulate, then flush (I think this is the right term) and refill with including inhibitor? House system is 4 radiators + 1 towel rail heater (can pour liquid...

to be honest - the first visits, the fault didn't actually manifest itself - the boiler ran ok while he was watching it. this visit was the first time it locked out while watching

gracias. the guy came out to look at it for apparently a third time, this time the fault happened while he was watching, replaced solenoid, boiler has been behaving itself so far for 6 hours - basically a fix

Hello, I've done a couple of searches and found a possible answer. what is happening is (standard behaviour?)... lower orange light is on. press the reset button, lower orange light switches off. the motor fires up, and a couple of seconds later, the whoosh anything from a couple of minutes...