I have an 84 Westfalia.  After a few minutes of running, my temp gauge always
goes to the 1/2 mark.  It only goes over when it's heated.  All of a sudden
my gauge is only going to the 1/4 mark.  It has never gone only to the 1/4
mark before.  Any idea what this means?  Also for about 2 yrs the red light
above the 1/2 way temp gauge has blinked on and off.  I don't know if this is
related.  Any suggestions?