Christian McArdle wrote:

Where can these plugs be obtained, are they expensive, and do they
really save that amount of energy?

I have no idea what it is, but you can be sure that it doesn't work. The
fridge manufacturers go to a lot of trouble to get good energy efficiency so
that they can put 'A' stickers on the things in the showrooms. If there
really was a 50p device to save 20% of the energy for free, it would already
be incorporated into the design.

We have had this thread a few times in the (several years ago) past.
The general speculation/conclusion was that _very_ old fridges and
freezers might save some juice this way - the plug is mainly just a
diode IIRC!).

It is also possible that under normal conditions of service there is a
small amount to be gained but that under arduous conditions (like the
hot week in early August) the plug might actually interfere with the
correct operation of the motor.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html