My 1999 Acura TL acura has been for an year acting up. It will only blow HOT or COLD air, no intermediate warm feeling If I raise temperature to 90, it will blow hot, anything lower, it will within the next few minutes switch to cold air.

Check engine light has been ON and dealer said that the dashboard has to be be removed for them to work since the codes indicate that side of the engine.

There is also a strange clicking noise near the passenger vent when the vehicle is in idle condition.

I am relaying these info to see if you have experienced it before or its possibly interrelated.

Thanks for your help.

SR.

 

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