Recent content by deagle

Thanks.. .it is a Valliant EcoTec and they are ok with Microbore (or so says the manual). House was built in early 90's.

Is having one of these pressure tests advisable ? I hear horror stories of boilers failing to maintain pressure and our pipework is 20 year old microbore. Anyone had experience of converting to a combo and :(having problems ? Thanks Deag

Now fixed. :D :D For the record, it was the synchron motor. I did the test suggested by matt1e - prior to fitting and can confirm that a faulty synchron can affect which of the wires goes live - hence making it seem as if the programmer or thermostat was faulty. JoBloggs -...

....very interesting - thanks.

Many thanks for all the replies and advice. I am sure that any one of you could have diagnosed my issue had you the opportunity to physically access the system. From reading the Honeywell guide, I now understand that the Orange wire is switched live as an output of the midpoint valve to...

I definitely don't get heating on all the time. Indeed the only way that I can get heating is by locking the valve in the mid position and firing up the hot water. My curent plan of action :- 1. Remove and inspect the motor and microswitches as per Neale's post here...

Thanks for the replies folks... Joebloggs... I will check tomorrow. Have had a glass of wine now (festive spirit etc) - I am old and wise enough to know that alcohol & electrics don't mix :D :D Oh, and I am not sure if this is relevant but British gas fitted a new fan and APS tube to...

As requested, I have rechecked and my replies in CAPITALS above. I have also confirmed my original results and can confirm the readings. In each case I am measuring the voltage between the BLUE (Neutral) and the wire in question at the LWC1 wiring centre. In the meantime, I have...

Oh, I forgot to add..... If I set the Mid position valve to locked using the manual lever - which is both outlet ports open - then I can get hot water to the radiators (as expected) ....but only if the h/w is on (not if c/h is on only).

Hi, Boiler fires ok in h/w mode but refuses to fire in CH mode. Thermostat looks ok - clicks when powered and moved above ambient temp. Also overriding thermostat (shorting the live to call) does not cause CH to fire. I think that I have a faulty mid-position valve (ACL 679H340-30L0)...

Hi, I have (foolishly) bought a B & Q "select unwind" tapset on the understanding that it would work with low pressure systems... the B & Q brochure indicates that it does not require high pressure. We have a gravity fed sytem and find that we are getting poor water flow ( 1gal per minute...