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Yeah its prob stuck...unscrew the collar thats highlighted in that pic from othger post(should be able to do it with your hand)...oh turn TRV up to max first. Youll see a pin when its removed..push it in and out with a blunt object being careful not to damage it or bend it by applying any...

Well...i see the Ebay item was bought...was it you??

I have one of these T-stats aswell (actually its the CM921...the same except 1 day not 7) Anyway if i remember correctly it states in the instructions that the optimum start is only for the first setting of the day. I have not enabled the OS though so cannot comment whether or not it "learns"...

I just checked my manual and the part number is 386149 which corresponds with product code 079716 Marty

It will fit(i know by looking at it even!!)...its more than likely a newer version than whats currently in your boiler so will have a different revision number. So youll also benefit from revised electronics. Mine was a 25B and i think i replaced with a 25E aswell...the number on my original...

Here are my two earlier posts describing the symptoms you have now last october or thereabouts.......... http://www.diynot.com/forums/viewtopic.php?p=713895#713895 http://www.diynot.com/forums/viewtopic.php?p=715017#715017

I_Know_nothing I have an ideal classic NF50 It had the same symptoms you are describing for the last 2 years...a swift thump and it would start up again. this year i made a few mods to my heating which included moving the boiler to the garage and i contemplated getting a newer model. I was...

Hi doitall...yes your spot on 100KWHR...which is what i wrote earlier Tony. Anyway, You say get the boiler stat down to less than half way, will this encourage my boiler to cycle more even when there is demand for heat?...which is why i have it set high....I assumed the less cycling the...

Ill turn down the output on the boiler and i have all my figures written down and ill see how it performs over the next 24 hours! Based on my calcs...if i am using 100KW per day and my boiler is running at 17.8KW then my boiler is firing for 5.6hours a day..i only demand heat for 6.5 hours so...

Actually just did same test for 3 minutes with a proper stopwatch.(last test was using a less than reliable method!!) It used on average .027333 units per minute...which converts to 17.9KWhr. So i can only assume thats fine based on the parameters i gave above. I have my boiler set quite...

Thanks john, Ill get the cover back on it..laziness im afraid! I lagged the pipes alright but only with regular stuff. Anyway i just took some readings to see if they add up. I ran it for one minute and the red dials moved from 688 to 720, thats .032 of a unit (im in ireland so may be...

No..in fact i recently closed the valve to the hot water cylinder! Dont shoot me down now here..but could the fact that the casing/housing is off the boiler be increasing usage? Boiler is in garage and its not draughty out there..but it aint heated either out there!!(i took the casing off to...

John...that should have read "100kwhr per day"...yeah i have trv's and a stat. Still reasonable? Marty.

Hi, just checked my average gas usage and its working out at 9KWhr per day over the last week which has been cold enough i guess. Edit....just under 100KWHR per day...which is roughly £3 here. House is 1200 square feet 2 storey semi d..attic well insulated(270mm), PVC windows,cavity block...

Is your loft space well ventilated...this type of setup it needs to be to get the timbers dry...it may be possible that a recent insulation job in your attic has reduced ventilation @ the eaves?..hence condensation? Also...your wet spot is on the wall just below ceiling level, are you sure...

youll need SWA and you should zig zag it a little to allow it to stretch if required due to ground heave...warning tape aswell as someone else said. No prob with laying them all in the same trench marty.

oilman, Im glad you said that and not me...the workmanship is usually good but unfortunately the planning is often non existant. After recently putting a lot of work into my own heating system i have realised that more often than not heating systems in Ireland are poorly designed even on new...

Hi terry, It was installed by a qualified plumber only 2 years ago. anyway i have done a bit of googling and apparently the only bit of hardware out there to handle this is a dunsley neutralizer... http://www.dunsleyheat.co.uk/neutralizerpics.htm You say it should work with full control...

Bump....anyone??

It should be above the tank by a few inches, but doub t its causing your problem.(see if you can shift it up to ensure it doesnt contact the water in F&E) Re-read the gas4you reply...i dont think you followed what he asked you to do.(drain from system and see if tank emptys) marty.