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Well what exactly is the black tar stuff? Is it used as a seal of some sort?

No sign of any rad. Exactly the same setup in my nan's house on the same estate, and she's been there since day one. The stat in the hall, TL 25T, has the top dial attached to a coiled tape... perhaps a thermometer as suggested. These two stats are three steps apart through a doorway and...

Yep

Hi y'all Potterton Homewarmer gas BBU: gravity DHW / pumped CH Switchmaster SM400 Programmer We have two Satchwell room stats; a 'TL 25' is in the living room where the BBU and Potterton Homewarmer Legend fire is and no radiator. The other is a 'TL 25T' and is in the hall where...

Got a feeling it's an '86 model of Landis & Gyr (CL27.2 ?)... though there's a handwritten label stating '14/4/87' (initially thought it read 89) which I assume was it's install date. :)

Tails go off to shower's RCBO. Fantastic terminating! :shock:

wow... must have had the same sparky. 6mm tails off supply side of CU switch to shower RCBO.

Thanks Holmslaw. Wallpaper pre 60's... it's gotta be! :shock: Behind the CU the brick cavity is opened up for cable routing. Draughty. JB: cable at 7 o'clock is spur... which is then further spurred off for two radial sockets in conservatory (I'm told was installed 2004). Original...

Install circa 1968 Meter dated 1989 CU just dated! Thanks. UF

Aint she pretty! Can anyone make out the size of the incomer tails? 10 or 16mm? 6mm tails off to shower's 30A RCBO... no isolation. Pretty JB in attic; spurs off to sockets with spurs upon spurs! Should keep me busy. This 2bed semi was built in 1968. Would this stranded T&E date...

What's this tacky gloopy-looking drool? :shock: (Also, is this TN-S? :oops: )

:? How would you qualify for this secret-squirrel forum? Would you have to be on the certified installer scheme? :?:

Current programmer is a Switchmaster SW400... can this be replaced with an ACL Drayton LP241. I'll be looking to replace the room stat and fit a cyl stat until funds allow a new system or the b0110cks drop out. All the fun will start next week! :)

4A overload setting is undersized, as you've agreed, correct to 4.3A Is there any couplers between switchgear and pump... isolator, plug/socket, JB ? Could it be that the float switch is bobbing about causing chattering of contactor at/near low water level? All connections secure...

Is there just the three terminals L, N and E... or is there a 'S/L' as in switched live? How long do you cover the sensor for... as some have a period before switching? Correct polarity? Lamp fitted securely? Foreign rubbish?

What happens with electric showers if the mains water pressure drops... I mean do these units have pressure switches to switch off the element during pressure drops? If so, perhaps the water inlet mesh is clogging. Is there an in-line non-return valve in the water feed to the shower...

Automation Logic Manipulator. Time served "Factory Fiddler"! 'Corporate Spark' at packaging plant.

Percussive maintenance used to work great on old tellys... not sure it's advisable on valve heads!!! How long have you been bullying it? ... you may have scarred it for life. You could grab a new one instead of faffing around. By all means tinker... take it apart, grease it up and put it...

My only visualisation... ... it's way too early for this!

stevenhayes The diagram is only meant to be a guide. I do share your view that some on this forum "speak down" to fellow members who aren't perceived to be as knowledgable... after all this is a DIY forum. Saying that... there is a lot of help available here... as long as personal...