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Both of these statements indicate there is a lack of flow through the boiler. When the flow is restricted, a kettling sound is heard, followed by the boiler stat switching off the boiler. Are there any indicators (LED/LCD) on the boiler after it cuts off? Logically. 1) Has it always...

I agree with Matt1e on this one. I don't think it does "work perfectly", the rads may get some heat when a limited amount of water passes through the rad circuit, however, if the 3-port valve is manually turned to CH (with the actuator/head off and the programmer set to CH&HW), the boiler...

OP, I have a Vaillant ecoTEC 418, VR65, VR10 & VRT392 and probably know more about how they work than Vaillant's UK support & many RGI's! :roll: A few points which may help you; 1) The Vaillant controls VRC470, 430 or VRT392 provide modulated flow control of the water temperature...

Have a look at question 6 in the FAQ here - If you convert your 65/75 units, what's the kWh usage? Or tell us if you meter is displaying Cubic Feet or Cubic Meters? Have you calculated your whole house heat loss (See here) yet??? :roll: - Once you do that, you (we) can more easily identify...

It sounds to me like the boiler is working as it should be! Prior to adding the additional radiator capacity, you imply the boiler was cycling!? This was likely due to not enough heat being dispersed in your system compared to how much heat was being generated by your boiler. Now you have...

:roll: - Nokia is Finnish and was once the market leader worldwide for mobile phones... Microsoft was once the biggest technology company, today, Apple (AAPL) has a market cap of almost double Microsoft (MSFT) - If you don't innovate and move on with the competition, you won't survive. :wink:

Innovation; the creation of better or more effective products, processes, services, technologies, or ideas that are accepted by markets, governments, and society. Innovation differs from invention in that innovation refers to the use of a new idea or method, whereas invention refers more...

The room with the thermostat should not have TRV's installed on the radiator(s). There should be two lockshield valves on the rad (to prevent anyone turning it off) allowing the room stat to do it's job. It would depend on the plumbing but doesn't rule out a HW leak per se. Yes, needs to...

I see your point. The scenarios I was thinking of were un-expected changes in outside temperature. e.g. Your thermostat usually turns on the heating at 07:00 - this w/e there is a severe weather warning where temps are likely to drop more than normal. Knowing this in advance, Weather...

Wouldn't be hard to add multiple methods of sending the data to the boiler(s) in their own requested format. i.e. OpenTherm or Vaillant eBus etc

If implemented correctly, it could be "Weather Compensation 2.0", pro-actively knowing what weather is comming could really help in energy efficiency IMHO. p.s. See here for a list of data providers http://www.programmableweb.com/apitag/weather (list includes the Met Office, Google or Yahoo...

:roll: - Why is the UK Heating industry so reluctant to change? Do you not like innovation? Wouldn't a product such as this be easier for you as a RGI?

Or it's a popular / desired gadget? :) - FYI, Nest was exhibited at the Consumer Electronics Show 2012 in Las Vagas a few weeks ago (CES is a trade show where ALL the next generation gadgets are shown off / launched) and several high profile people have blogged / tweeted about it since.

What about your customers? To me, it seems like a fit & forget type of control (the way it should be) that also works with todays ever changing household routines. Many people work flexible/odd hours and don't have set patterns like they used to... It says "Weather aware - Nest uses its...

Is this the room thermostat of the future? http://www.nest.com A learning thermostat that requires no programming, it remembers your habbits and makes the changes as required.. it's features include: 1) A simple, intuitive interface 2) Apple'esk design / look about it 3) WiFi /...

Neither has a large retailer! (I've worked for a very large one...) At the end of the day, it's all about cost vs risk vs reward. A large retailer could stipulate with their suppliers for a 6 yr warranty, however, that results in an increased stock holding for the supplier, resulting in...

There should always be a contract relating to the return (commercially or physically) of a consumer product from the retailer to supplier. In the commercial world, if something is not stipulated in a contract and involves money, the 'buyer' will always take the hit. In practice, the last...

There is... contract law!! Any reasonable sized company will/should have a buying contract with their supplier(s). Part of that buying contract will be what happens (commercially speaking) with 'faulty' products. Alternatively, a retailer can opt to purchase products without warranty (again...

1 year has been adopted in the UK as being a "reasonable" period of time for many consumer products (The law stating "reasonable"). This is costed into the products, i.e. a line on the BOM (Bill of materials) will be the warranty cost. If the product is intended for the UK market, the warranty...