Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi my name is ***** ***** I will be happy to help with this today.I apologize for any delay.
From what you have described here this does sound like a temp actuator may be at fault.They can cause a noise like this here as well as keep the temp from changing from hot to cold or cold to hot.I have had to replace several of these before in the past for this issue here.If you can tell me what model vehicle this is as well if it has the manual heater and ac controls or the AUTO with the AUTO functions on it I can see if I can post the actuator location just let me know.
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O.k.,the right/passenger side actuator is located on the side of the heater box on the far passenger side near where the passenger puts their feet as seen as #1 below.This actuator has most likely failed and is causing both of these issues here needing replaced.