Hi;

New to this site, I just bought my 55 a few months ago.  I have an issue with the temp gauge.  The gauge reads just to the left of the H position, even after the engine has reached normal operating temp, although it does move a little bit.    When the engine is started the gauge still reads on the H position.  When I short the wire to gnd going to the sending unit the gauge does go to the C position.  This car does have just the one sending unit,  not a thermal switch on the passenger side.  But the sending unit   does have two terminals on it with about 1.7 ohms, cold, measured between the two terminals.  It would seem that the sending unit is not the correct one but I'm not sure.  Any thoughts would be appreciated. 

Thanks
valencia