Search results

My boiler had a similar sounding fault. See the following post:

ZIGGY786 has a problem with his Vaillant Thermocompact boiler. He has screed underfloor heating downstairs and floating floor underfloor heating upstairs. He also has a hot water storage tank upstairs in the loft and the boiler is in the kitchen. He used to lose water pressure on his...

It's done now - insulation resistance tested before and after plastering. All is good. Thanks to the people who helped :)

What?

Great :) Thank you!

Hi Ricicle I'm aware that there are regulations, but I don't know if I know what they all are yet. Regarding notifying, this is part of a larger renovation project for which building control is already involved. The circuit won't be "livened" up yet - I'm just chasing in this cable so...

Hi I want to chase a cable into the wall above the sink in my bathroom, and mount a light on the wall. The cable will run vertically and connect to the lighting circuit via an existing ceiling light rose. How deep does the cable need to be in the wall? Also, can it be capped, or does...

Thanks to everyone who contributed on this topic, especially Andygasman10 and The831Bunny, who each took time to address the questions in the opening post. To those people who thought that I wanted to fault-find the unnecessary firing problem - thanks, but I had already diagnosed that problem...

This isn't the end - I'll be reporting back with the results of any changes I make. Since my thanks seem to have fallen on deaf ears, the least I can do to repay the site is document this experience for other non-experts to read.

Impatient? I don't think I am. Nor am I ungrateful - I've been thanking people left right and centre. But in return, as well as the free advice, I've received 'free' abuse, in the form of sarcasm and personal comments.

130330 is actually what I've ordered - I just wanted to see your reaction ;)

Call it what you like, but the bypass valve came in a Vaillant box and was bought at Parts Center. Thanks for those figures Andygasman10. If my understanding is correct, the NTC thermistor is used (along with the user control knob setting) by the temperature control PCB to modulate the...

http://tinyurl.com/VCGB242EH So is it now the concensus that the heat exchanger is scaled/blocked?

Thank you Bunnyman for some sound points. I had already identified that this is a hybrid model and Vaillant gave me the part number for the main PCB, but thanks for the tip-off. The bypass valve for this boiler cannot be fitted the wrong way around because it's incorporated into an...

Hi Andygasman2010 Vaillant confirmed that the main PCB is faulty if it fires with no wires in terminals 3 & 4.  If you disagree then please go ahead and explain why. I hear your advice about replacing the main PCB before delving deeper, which sounds wise, but the only reason for delaying...

Yes, this is a heat-only boiler, and yes, there 2 x two-port motorized valves, which have been installed exactly as per the Vaillant instructions and are in perfect working order. The boiler, which I'm fast realising now that nobody else here knows anything about except for me, has an...

This boiler is firing when not in use because the main PCB is faulty. Thus is about to be replaced, but that might just mask the other fault(s), hence I'm keen to find those faults now. This boiler has neither a secondary heat exchanger nor a pre-warm feature - it is a very simple and...

Thanks to everyone for your replies. Please note that is a heat only boiler - one heat exchanger, no divertor valve. Thank you bunnyman for your fault-finding advice, but I had already determined that the main PCB is faulty. My focus is on the systems that prevent the condition of...

Thanks to you all for taking the tine to reply. I can plainly see that my boiler is far from rubbish, in design and construction, reliability and longevity. With the exception of overheat detection, all of the safety systems appear to be in place and functioning, so I'm going to continue...