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Think I might've cocked up a bit (about right!) Connected hose, turned on tap, left for 30secs then turned it all off again. Disconnected, went round rads to bleed (only a small amount from 2 rads) and continued bleeding from airing cupboard bleed valve for a bit. Seems the waters a little...

and to top it all ... the bloody boiler's popping overheating almost every few mins now. Is there anywhere on the Baxi Solo 3 that I can bleed, or is the bleed in teh airing cupboard it?

OK ... THIS IS SERIOUSLY STARTING TO GET ON MY T*TS!!! Is there an easy way to identify a circuit diagram of the plumbing, from the pump onwards ... i.e. to which rads, whether its a single feed/return or dual, etc. as some rads work, some don't at all, some are lukewarm after 2hrs of running...

Good call, will do now and report back ... thanks again for your valuable help, I really do appreciate it.

Also, the boiler's overheated and cutout a couple of times. The thermostat is set to 3 of 6 which is about mid-way. Perhaps suggest a restricted flow to take away the hot water? Have shutoff the upstairs rads, waiting for a few mins now to try the "balanced rads" idea ...

Ahhhh ... makes sense ... will try now and feedback ... thanks for your advice, much appreciated :D

Whilst I give it some thought, it might be possible one or more rad valves are blocked or restricting - is that a common problem?

Well, all I can say is ... when your TV breaks ... GET IT FIXED ... it's a false economy leaving it a while :lol:

Thanks for the reply - much appreciated - will try it, and feed back.

Boiler's a Baxi Solo 3 and it seems to be working fine. Not tripping out for any reason, just cycling on and off as I'd expect. At the water pump, the water in the pipes is nice and toasty hot, as indeed it is as it passes through port A and/or B depending on where the 3-port valve is...

MANDATE, just wanted to say thanks loads. It's all working now, albeit slow to heat up the rads (separate post). Many thanks for your valuable advice.

Just fitted new pump, new pcb to boiler and new 3-port mid-position valve. Just emptied and refilled with clean water and fernox flush, and all "sounds" to be working okay (although having to bleed air from bleed point in airing cupboard loads when h/w is on). Rads taking ages to heat up (15...

Appreciate the quick feedback - thanks tons - will check tonight and advise what I find :D

Quick question: open vented central heating system, having probs right now, need to know if the pump (which is in the airing cupboard, just before the splitter valve (left to tank, right to heating) is instructed to turn on or off by the boiler or not? If not, please advise where it might be...

Good call, did check using small multimeter and it's fine. Based on the fact the pump wasn't being triggered, the gas pressure is good and electrics fine - I've decided it must most likely be the pcb board. Bought one new off eBay and should arrive tomorrow morning, so will update when it...

My pump sounded knackered, so I replaced it (quite easy job) this evening. I noted the water in the pipes was black, although not sludgy. The new pump duly ran for a while and all was well (although the rads seemed to take forever to even start getting lukewarm. Then the boiler stopped, as...

Thanks guys, that makes sense and I'll check for a dip in the overflow pipe and the friction in the ballvalve, tonight. A thought occurs - could it be possible some "pressure" is building in the hot water tank, and every now and then it "releases" by spurting via the hot overflow into the cold...

My cold water tank in the attic seemed fine until quite recently. Every now and then (it seems random, perhaps once every week or fortnight) the overflow pipe flushes water into my back garden for about a minute. It comes out with quite a flush (i.e. not dripping, but flowing out at a rate of...