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Doug
Doug, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 8538
Experience:  Mitsubishi employed and Factory trained ASE certified technician
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Mitsubishi outlander: hacv fan very noisy,like a playing card

Customer Question

hacv fan very noisy,like a playing card in the spokes of a bicycle, and of course heating knob very hard to turn
Submitted: 1 year ago.
Category: Mitsubishi
Expert:  Doug replied 1 year ago.
Hi,
You will have two issues in play here.
With regard to the knob being hard to turn, this will be a malfunction of the blend door. These blend doors are susceptible to leaves/debris contaminating the grease on the door tracks, causing the grease to harden and become more and more difficult to turn the knob. Initially you will find the knob a bit resistant, then it will become spongy, seeming to jump between 2-3 positions instead of being fluid as you rotate it, and eventually it will resist turning altogether. When this happens, you will eventually either kink the cable, break the shaft for the knob, or both.
The only way to completely fix this is to pull the dash, pull the crash bar, remove the AC box (requiring discharging refrigerant) and then disassemble the AC box and either replace or clean/regrease the blend door.
There is NO other solution to restore it to original condition.
With regard to the card in the spokes sound... this will be pretty much what it sounds like. There will be debris or leaves stuck in the fan blades of the blower motor fan doing effectively the same thing as cards in bicycle spokes. There are three screws holding the fan in under the passenger side dash and you can then lower it out and clean the debris out then pop it back in. The two issues are sure to be related, both are caused by debris entering the AC system duct work.

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