This was one of two temperature
contollers (one of which I killed) as liberated
from the skip again.
As it happens they are 'make when cold' contacts
as opposed to make when hot but vestigial remains
of a contact was available from some other
incarnation of the design. That would do to drive
a realy though.
Remember to fuse
protect the circuit - A 30 amp relay and
25 amp blade fuse should fit the bill.
Barrel fuses are bad at this kind of
current.
I could have
arranged for some fancy circuitry though
- maybe later.
I had the feeling
I may have had to build a proper
controller in the end - as it turns out
this works great.
It
seems these thermostats are available
from RS
at quite a good price - I might even get
a nice new one myself. Here
is a screen grab of their page
For a car with so
much space in the engine bay it was
surprisingly difficult to find a place
for this box. I eventually settled on a
bent bracket, trapped beneath the
battery, not too bad but can foul the
spare if care is not excercised.
This
is where it eventually ended.
The sensor bulb is
trapped under the bracket
that holds the fan in and is effectivley
in firm contact with the top fins on the
radiator.
Watch this space
for a report on how it works out.
And the word is -
it works!
Tends to switch
off after a short while but comes back on
again soon if needed. The temperature
guage never creeps above 90 degrees -
