A heater control valve is simply a water valve which allows more or less water to circulate through the heater core, depending on how much the valve is opened.he coolant flows  through the heater core all the time.    Temperature is controlled by:    Temperature blend door-control how much air travels through  the heater core -   A small motor that controls the blend door-a rather common  failure point.
In 2002, Tyson fought for the world heavyweight title at the age of 35, losing by knockout to Lennox Lewis. Tyson retired from professional boxing in 2006, after being knocked out in consecutive matches against Danny Williams and Kevin McBride.
Mike Tyson KOs Buster Mathis This Day December 16, 1995 Posted on 16 Dec 2016. Ali and Foreman Play at Quarry vs Shavers This Day December 14, 1973 Posted on 16 Dec 2016. Bonecrusher Smith KOs Tim Witherspoon This Day December 12, 1986 Posted on 13 Dec 2016.