Hi there,
Thank you for the donation,
I have asked a Saab Tech about this and he suggests that it could be a heater control module, but as the system is quite complex you should get it tested by a Saab specialist to ensure that the correct diagnosis is made, there is a series of tests that must be done to trouble shoot this correctly.
Mark (mhpautos)
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Tuesday, April 20th, 2010 AT 10:02 PM