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View the thread, titled "Vaillant Boiler Power Boost" which is posted in Boiler Advice Forum on UK Plumbers Forums.

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Many years ago I worked for a floppy disk manufacturer and was surprised to learn that for economy of manufacturing all the magnetic disks inside the case were 1.44MB. The cheaper to buy 720KB disks had their storage capacity limited by a notch in the outer case. Both disks costs the same to make but sold at different prices.

Later I worked for a manufacturer of enterprise data storage systems, mainly sold to financial institutions. The standard model was $300,000 The higher capacity model was $370,000 (those were 1985 prices!!).
Talking to a service engineer I was amazed to hear he disliked having to go to customer premises if they purchased the $70,000 upgrade because he only had to flick a switch and then pretend to be busy for several hours!!

Which leads me to my enquiry ...
If I put (accidently) a 615 coding resistor in my ecoTEC 612 plus - what do you think will happen?

Meow
 
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