I have seen broken blend doors before it happens. Before you remove the heater plenum remove the actuator and try to move the door by hand.
Check you this guide will show you what I am talking about.
https://www.2carpros.com/articles/replace-blend-door-motor
Here are diagrams to help you see what you are in for when remove the heater plenum.
HOUSING-HVAC
WARNING: Disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in an accidental airbag deployment and possible serious or fatal injury.
WARNING: Refer to the applicable warnings and cautions for this system before performing the following operation See: Service PrecautionsWarning and See: Service PrecautionsCaution . Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: The HVAC housing must be removed from the vehicle and disassembled for service of the heater core, A/C evaporator, air intake housing and the mode-air and blend-air doors.
https://www.2carpros.com/articles/re-charge-an-air-conditioner-system
and
https://www.2carpros.com/articles/replace-heater-core
Check out the diagrams (below). Please let us know what happens.
Cheers, Ken
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Wednesday, May 23rd, 2018 AT 11:44 AM