Noise from the a/c ventilation flap motor in passengers side

[Christa]

hi Christa from greece i own a 1999 2.5 boxster last month when i stop my climate and when i open again i listen to a noisy opening of the "flap" in passengers side of the car the motor when the flap is open or close make the mechanism make a "tac tac" noise why this is happening?

thank you very much christa

[rsfeller]

hi Christa from greece i own a 1999 2.5 boxster last month when i stop my climate and when i open again i listen to a noisy opening of the "flap" in passengers side of the car the motor when the flap is open or close make the mechanism make a "tac tac" noise why this is happening?

thank you very much christa

Hello Christa,

Is the sound in the far right by the vent or more down low by the feet of the passenger compartment?

Does the tic-tic stop after a minute or continue forever? Can you make the sound go away by directing the air flow in a different configuration?

My thoughts include:

1. If it's from the far vent it may very well be the air temp sensor, do a search on the board for lots of information on this. There is a sensor in there that measures the cabin temperature and helps set the automatic climate control (ACC). The fan that helps draw the air in can either get something stuck near it causing a sound or the fan motor itself is "off" a bit and making some noise. Often a squirt or two of a silicon lubricant can solve the issue but some may argue it could cover the sensor too. I've done it for years in other cars to solve a noise suction fan but often I take the whole part out to direct the lubricant and clean the sensor with a q-tip.

2. If it's more tic-tic that is noticeably heard only at certain times when the temp and air flow in configured in a certain manor then you may have an obstruction in the flap that opens close a particular vent. Often when something obstructs these flaps the gear may "jump" to compensate for the plastic parts NOT to break. Or it may be a symptom of a damaged flap mechanism or an arm out of place. Obstruction could be caused by insulation foam from further upstream.

Have you had issues with foam coming out of your vents in the past in small pieces?

[Christa]

i examine under the passengers side console and i found that the motor wich open and close the flap the mechanical parts after the motor drive the parts wich move the flap make the noise for a few seconds when the flap open or close. i looks like the flap opens and after the motor try to run for 5 seconds more and the flap is already opened and the motor forced more time to open.

i put some lubrricant and the noise of the more trial to open stoped but is noisy this opening and closing of the flap. it can be listened inside the cabin.

Edited April 2, 2008 by Christa

[Christa]

thank you guys for the part numbers off my rubber and plastic screws and it is not he it is she Christa ... :)

you dont believe women know some mechanical issues ... :)

[RFM]

The motor is a servo motor ( with self control ), probably the motor is faulty. You need a PIWIS tester to activate and check.