cylinder stat

[swindon]

Is it advisable for a DIYer to change a cylinder stat - is there anything particular I need to know? Do I have to drain the system? Any help much appreciated

 

[hi-spec plumbing heating]

5 min job
you don't need to drain.
just change one wire at a time you can't go wrong.

just make sure you isolated the power supply.

 

[ChrisR]

Well you could go wrong! Sometimes the terminal numbers are different, if you get a different make.

 

[Softus]

Is it advisable for a DIYer to change a cylinder stat - is there anything particular I need to know? Do I have to drain the system?

Is it possible that you're thinking of an immersion heater thermostat?

If so, then you still don't have to drain anything, and it's even easier than a cylinder stat.

Isolate first.

If it's an off-peak immersion heater, don't assume that it can't energise while you're working on it.

 

[swindon]

Thanks for comments- the reason I ask about draining the cylinder is the stat looks unlike the ones on eg screwfix website - it has two wires coming out the end, seems to be moveable in and out and of a hole in the cylinder witha nut on the end - I think it is a combimation cylinder - we have no cold water or F+E cistern

 

[JohnD]

how about posting a photo?

http://www.diynot.com/forums/viewtopic.php?t=99672

 

[Softus]

Thanks for comments- the reason I ask about draining the cylinder is the stat looks unlike the ones on eg screwfix website - it has two wires coming out the end, seems to be moveable in and out and of a hole in the cylinder witha nut on the end

Maybe the thing you're looking at is the immersion heater element - it screws into a large boss in the cylinder.

Here's one:

You have to drain the cylinder to replace the above component.

The thermostat is a component that works in conjunction with the element, and looks like this:

I think it is a combimation cylinder - we have no cold water or F+E cistern

It doesn't matter. Either you have an immersion heater or you don't. If you have a combination cylinder then it just means that you can't have a top-mounted IH.

One remote possibility is that you have one of those weird low voltage elements. Does it look like this:

 

[Diyisfun]

softus..u have to much spare time..

 

[Softus]

I doubt that is took me much longer to post that that it did for you to read it.

 

[Diyisfun]

you right there...my scroll finger has a blister now.

 

[swindon]

Thanks for further replies - it is definitely not an immersion stat - Ive taken 2 pictures but im not sure hoe to attach them to the message!

 

[Softus]

...im not sure hoe to attach them to the message!

Put the hoe down and read JohnD's post:
http://www.diynot.com/forums/viewtopic.php?p=732387#732387

 

[swindon]

Have now done all that and here in all their glory are the pictures via photobucket assuming ive done it right

http://s220.photobucket.com/albums/dd34/daniellemartine12/

 

[Softus]

it looks to me like a dry component, not a wet one.

Is that a screw in the side of the big nut?

I so, does removal of that screw allow withdrawal of the thermostat/thermocouple?

 

[chrishutt]

Yes, undo the screw and the thermostat phial will pull out. By the way, why do you think it is faulty?