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Hi, Does anyone know the part number for the combustion box door seal for the Potterton Promax 24HE? It's not listed in the short parts list. Thanks.

I think I may have the answer! In the last week or so the boiler has been cutting out after it's been on for any length of time. My investigations have found that the fan protection stat is cutting in and shutting down the boiler. The fan housing gets very hot to the touch. Noisy bearings...

Boing. Anyone?

Please reassure me that I'm not going crackers!! I'm almost certain that the frost stat circuit on our CH system isn't wired correctly. The frost stat is a Drayton RTS3 (or British Gas FS1 if you prefer), the pipe stat is also Drayton but I can't see a part ID on it. The frost stat backplate...

Morning all, Our CH/HW system has recently started 'moaning'. It's quite an eerie moaning rather than a screeching or grinding noise. It seems to be worst after the system has been on for 15-20 minutes from cold. When it first started (just before Christmas) it was for 30 seconds or so and...

Beady, (or anyone!) Did you ever get to the bottom of this? I have the same boiler which has had this problem (intermittantly) for nearly a year now. Sometimes the boiler acts dead unless you reset it, then it works perfectly. System pump is running, zone valves are set but no life from the...

Update: The job snowballed a bit once I started and resulted in rather a lot of remedial/extra work. However, yesterday I received my completion of works cert and I now have an electrical system that I trust not to catch fire and/or kill me when I'm putting the kettle on! Other than a...

So what would you do to make sure the lights stay on?

Also, I only have to run one cable instead of 3. :)

So worst case scenario would be that the 40A trips and the lights go out too instead of just the sockets going off. Not ideal, granted, but not a total disaster. What's the solution then? A type C breaker at the main CU? edit: Just read the thread you started on discrimination, I think...

I suppose I could run it initially as a 20A spur and upgrade the MCBs if I wanted to convert to a 32A ring in the future. The cable goes from the consumer unit straight into the first floor void, then across the kitchen (in the floor void) then across the utilty room (in an insulated...

Thanks for the reply. :) Probably don't need 32A at the moment but I may well need the extra capacity in the future. I suppose if I make sure the cable from the CU to the garage CU is capable, then it's not going to be a huge job to upgrade from a 20A radial to a ring in the garage itself...

Boing. Anyone have any other comments?

OK, fair enough. So if I were to take a single cable feed from a 40A breaker to the CU in the garage, that would be OK for a 32A ring and a lighting circuit? 6mm cable would be suitable for the feed, yes? Well aware of part P, the work will be notified to local BC. I just want to make sure...

Thanks for the quick reply Matt. :) Thanks, that's what I thought. Good point! I should have enough spare space on the board to do that. The garage is integral to the house, probably about 15m cable run from the main CU to where the garage CU would be. The welder's not huge, 100A...

Hello all, I've recently moved into a house which has an old style 6 way fusebox, circuits arranged thus: 40A Cooker. 6A CH pump/boiler/controls 30A Sockets (study, hall, beds 1 & 2) 30A Sockets (lounge/diner, kitchen, utility, beds 3 & 4) Single socket in garage is also spurred off...

Thanks guys, The system does shut off when both stats are 'satisfied' so I'm fairly happy that that part of the control system is working OK. The system was fitted by Grittish Bas nearly 5 years ago and as such is still under their service contract so they'll be getting a call (again -...

Hello, We're having a new problem with our DHW getting too hot. It's a pumped system with 2 zone valves controlling CH and HW seperately. Potterton Promax 24 boiler. With the stat on the cylinder set to 55 degrees, it's possible to turn it to about 75 degrees where you can hear it click...

Bang on the money fitz!! I've done the fault finding tests in the installation manual, and it indicates a failed/blocked flow switch or some other blockage in the system. When he changed the pump, the engineer commented that there was a lot of debris in there. Looks like we'll be needing...

Hello, We've recently moved into a new (old) house with a CH system fitted by BG approx 4 years ago. We've had issues with it since we moved in, namely - 1)Radiators not getting hot in some rooms, with others getting to about the temperature of the sun(!). 2)The boiler would cut out (or...