I have a 2006 tacoma and one of the fans behind the vents on the dash is making a loud rattle noise when the heat/ac is turned on. Does anyone know how to replace these without taking apart the whole dash?
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Re: replace fans behind dash vents on 2006 tacoma
There should be only one fan and its under the hood on the passenger side firewall. it takes about 30 minutes to change and its the only motor you will see of that side,its held in by three screws and a plug.
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It appears your fan itself burned out. When a field coil of an electrical fan burns out it usually makes a lot of smoke. The noise could be something that fell in there that stopped the fan from turning freely. I can imagine it heated up under the strain and burned out.
When you restarted it was burnt out so hence no noise and no fan. The smell of the smoke should also be clue. Electrical field coils burning has an awful soury type of smell.
there is a mode controller/actuator in the passenger side area(behing glove box) that will make clicking and rattling noise when failed but I cant say it makes a "horrible" rattle but it is quite audible clicking and clearly is a noise coming from inside the left dash area
Concerning your broken vent -- this can be caused by a broken linkage or a malfunctioning servo motor as well. these vent have air ducts the sway back and forth to adjust the dual air flow function. if the servo o linkages are malfunctioning or not connected for some reason, it will not allow total control of the air flow and temperature range. Now, if you have a combination of a flow error and temperatureerror as well, thai can be caused by a combination of the two.
In this case, you will need to inspect the linkages as well as the servo motor function as well. in addition, i would test the air temp sensors for there operational value. they control the temp when you adjust the coll or hot function.
Concerning the Loud noise coming from the blower fan---
This issue can be caused by a misalignment within the blower housing or, it can also be caused by some minor damage within the motor itself, causing it to rotate in a erratic manner, in return, forcing it to rub against the housing itself. the best solution here is to extract this blower fan housing and inspect for lose fan propeller and motor stability. replace parts accordingly.
I had the same problem. I took apart the dash a thousand times, searching for the issue. It turns out you're right, it's the hood "hinge" bolts. Just place some rubber bushings on them, tighten them up, and maybe wrap some teflon tape around them, it goes right away!