The trouble with Accredited Installers are that consumers think these people are experts in their field. The reality is that someone in the company has attended a one day product familiarisation course.
An accredited installer has to reach a turnover target on the number of units installed per year.
Surprisingly, it is very difficult to get installers to do any kind of course, so the manufacturers are doing well if they get someone to turn up for a day, and a day is better than nothing. Worcester and others do their best to keep the good guys and dispose of the bad ones but unless they receive complaints it is not viable to inspect loads of jobs. And if they did, their installers would move their allegiance to another manufacturer, because no installer likes doing remedial works; especially if it isn't the customer asking for them.
If you knew the boiler installation industry well, you would know that the general standard of domestic boiler bashing is very poor indeed. In this market, if Worcester were very fussy they'd only sell 1000, not 300,000 boilers a year. Luckily, they try to be helpful when things go wrong.
Gas Safe Register tries to keep things at a minimum standard, but they don't care if your new boiler is installed to a muck filled system or incorrectly coupled to the old pipework - their remit is purely gas, and frankly, there is plenty of remedial works having to be undertaken with just that alone.
PS: I am a Worcester accredited installer, and a Which Trusted Trader. The latter costs around £780 per annum so I've got to get a few jobs just to pay that off.
