Valve should be located on heater hose line near firewall. It probably has a cable that runs from the dash heat setting to the valve. It can get stuck or the valve can get stuck. Check the cable for free motion as well as the valve. To flush the system do the same as a radiator flush with the heat setting all the way hot. Also leave it at the hot setting when refilling to avoid air in the system.
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Monday, October 22nd, 2012 AT 1:49 AM