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Re: Heater: driver side not as hot as passenger side
You've obviously done your due diligence and homework. Since the blend actuators (both upper and lower) are stepping to their full hot positions, about all that is left is mechanical damage to ducting, dampers, or poor sealing of the dampers. 15 year old foam rubber may not seal as well as it did 10 years ago. I had a similar thing with my '95 LeSabre, but on the opposite side. The actuators worked fine and the application of some new self-adhesive weatherstrip foam (the kind used to seal exterior building doors) worked well enough to get it to seal out the cold, unconditioned air.
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