Date: 16 Jun 2005 11:31:22 -0700 From: "yaofeng" <yaofengchennospaml.com> Subject: Re: Hot air constantly
I don't think there is a heater control valve on a 1990 9000. Although made by SAAB, it is very different from c900. If the 1990 9000 is similar to later model year 9000's, colant flow through the heater core continuously. Control is provided by the ACC actuating a motor to close or open a flap.