Check your email.I sent a PDF with all info on Auto temp control, 888 I think means no problems found, and the test you did is the EATC test! Try just looking at the engine cooling system, Heater Core " Plugged
WARNING: The heater core inlet hose will become too hot to handle if the system is working correctly.
Check to see that the engine coolant is at the correct level.
Start the engine and turn on the heater.
When the engine coolant reaches operating temperature, feel the heater core inlet and outlet hose to see if they are hot.
If the inlet hose is not hot:
the thermostat is not working correctly.
If the outlet hose is not hot:
the heater core may have an air pocket.
The heater core may be restricted or plugged.
If both are hot, the temperature blend door in the heater plenum may be broken or stuck.
Friday, January 8th, 2010 AT 5:54 PM