No HW, CH works fine

[danimere]

Hi all!


In need of some advice. Got home yesterday after a hard days graft, jumped in the shower only to find out there is no hot water left! Went to the thermostat and clicked 'water boost' The boiler didn't kick into life at all. No lights no nothing. I tried basic resets to no success. I then tried turning the CH on but the boiler still didn't spring to life! I have no power to the boiler. I traced the wiring back to the airing cupboard and checked supplies to pump and valve. Pump checked ok but no power to/from valve. I took the electrical front off (it's a Drayton Mid 3port) and found the valve was seized so assumed it had burnt the electrical piece out. This evening I replaced the valve body and electrical front but still have no hot water! The central heating now works though as long as it is turned on by itself. As soon as I turn the hot water on the boiler cuts out.


Any suggestions or advice would be much appreciated. Hopefully ive overlooked something or I've got a bad understanding of how the system works???


Cheers


Dan

 

[SimonG]

Cylinder stat or programmer.

 

[ShaunCorbs]

hows your electrical and plumbing knowledge ?

 

[danimere]

Thanks for the replies guys.

Simon: is there a way to test either or those?

Shaun: I'm confident in taking most things on but my plumbing knowledge is basic. With a little instruction I'll give anything a crack though.

 

[ShaunCorbs]

Thanks for the replies guys.

Simon: is there a way to test either or those?

Shaun: I'm confident in taking most things on but my plumbing knowledge is basic. With a little instruction I'll give anything a crack though.

you could hurt yourself then so get a spark with heating controls knowledge or a decent heating eng out your choice

 

[gassafe]

What programmer is it?

 

[danimere]

Sound advice thanks Shaun. I'm in the motor trade so I'm quite competent. But I'd never get involved with major electrical or gas issues. I was just after input to see if it was something I was able to do. If it's boiler related I'll seek and eng.

gassafe: it's a Grasslin Towerchron QE2

 

[gassafe]

Are the little LEDs coming on? Some times on the similar drayton ones when they fail you can tap the programmer & it will spring into life, this often means the relays in the programmer have gone...

You could pull the cylinder stat off the cylinder & check the bi-metallic has not not stuck in the off position also, just pull it off & press in a couple times...

 

[danimere]

The programmer functions as normal, it goes through all the cycles as it should do and lights up etc

I'll isolate the stat and have a look then report back.

 

[gassafe]

I'm guessing wired the new valve in correctly & fit the body the correct way

 

[danimere]

Haha yes I replaced it like for like.

Removed the stat and opened it. Some of the internals don't look to healthy, partially melted by the looks of it. I'm assuming this could be the issue. It's branded as Ikon on the front cover but has no other information. Would I have to replace it for the same one or is there a better alternative.

 

[gassafe]

I meant just check the bit on the back is not stuck, but if the internals are melted then does not sound good!

Ikon is the cheaper drayton stuff, does it look like this?

Drayton HTS3 Cylinder Stat | Cylinder Thermostats | NoLinkingToThis

 

[danimere]

Ok. Yes that's the kiddie!! And there's one in stock at my local store!
Once the new stat is fitted. Should it just be a case of switching the programmer to HW and it should all fire up again? Also what temperature are the stats usually set to, I'm unsure where mine is, it looks the previous house owner was a little aggressive in the screwdriver slot.

 

[gassafe]

Yep, should all be nice & easy... Obviously isolate the power first at the fused spur & check there's the correct 3 amp fuse in the system...

Switch on & see what happens... Come back tomorrow & tell us how you got on

 

[gassafe]

Oh 60 should be the maximum, you may need to go just below as hot water will rise to the top of the tank & the stat is at the bottom.

 

[danimere]

Thanks a lot gassafe! Yes I'll isolate where necessary. Yes there's a 3amp already there.

Thanks again! Hopefully I'll have good news tomorrow, I'm sick of cold showers!

 

[gassafe]

Put the immersion heater on

 

[danimere]

Not sure I have one?? If I did how would I switch it on?

 

[Rckape]

Either In the top or side of your hot water cylinder will be the head of the immersion with a flexible cable leading to a switch or a timer on the wall.

Flip the switch and you're good to go. Just remember to turn it off before you go to bed or it'll cost you a packet!

 

[danimere]

Nothing like that on my cylinder! Just a large brass 'bung' where I'm guessing the immersion element would go. Oh well cold shower it is

 

[Rckape]

That sounds about right, hard luck mate.

 

[spanner]

.. if you've taken out our preliminary tests and checked valves cylinders thermostat only thing left is programmer . What make is the programmer

 

[spanner]

You should be in eco mode with this lovely weather and shun sightings.. take advantage save a few quid have a lovely cold one whilst it's hot hot hot..

 

[danimere]

New stat fitted. Boiler up and running again. Thank you guys for all your advice much appreciated!

Cheers again!

Dan

 

[danimere]

Just a quick update. Poked my head in the airing cupboard to feel the heat off the pipes (just for curiosity) and noticed a drip under the cylinder Guess where it originated from? From the section of insulation where the stat is housed. At least I've found a reason for it melting!

The fun continues :/