Sensor Cleaner making noises?? (Nikon D300)

These are best cleaned with spray brake cleaner.

1st get a new air filter I recommend a quality brand like the oem one or purolator.
2nd remove and clean the maf sensor. Start with the screw clamp on the intake hose. Then unplug the sensor just squeeze the tab and wiggle it off. Now remove the 4 - 10mm boltsthat hold the maf sensor on the air box. Use caution as some models have a housing with brackets that are loose when the above 4 bolts are removed.
Next clean the air flow sensor using crc maf cleaner or other maf sensor safe cleaner. This is necessary as the sensor gets dirty as the miles accumulate. Make sure the sensor wires are very clean and let it fry for 30 mins before re-installing the sensor.

I would inspect the blower motor for debris as a 93 impreza doesn't have a cabin filter.
You can access the hvac fan from under the glove box see the attached video for how to. I know its not the correct subaru but the procedure is the same.

Sounds like either the Mass Air Flow Sensor could be dirty or defective OR a simple vacuum leak.
To check for a vacuum leak, get a can or injector cleaner or even WD40, and spray around the intake until you hear a change.
To clean the MAF sensor, BE SURE to get sensor cleaner NOT carb. cleaner!!
Or, you can take it to Auto Zone and have the "Codes" checked FREE.
Hope that helps. :-)

Ciould be the camera is cleaning it's sensor. Try turning that feature off to see if the noise goes away. If yes, that's your noise. Then turn the option back on. It's good to have your camera clean the sensor.

It all depends on where the squeak is coming from. Some very clean rubber parts make kind of a squeak but I don't think that is your problem if you use cartridge cleaning systems. The real answer as a 40 year plus Tape Deck Technician is to get in there and see what is causing the squeak- it may need some oil in reel table, Pinch Roller or even the Capstan Bearing. Manufacturers do not like to put oil into
unit as it makes for no repairs and you will not have to buy a new one.
I worked at Teac but this unit is far after my exit- I still do repairs full time on the product though. I am sure I could resolve it- I am in the Chicago are.

check and clean the map sensor /with only map sensor cleaner and be very careful how you handle this part very sensitive also its wireing plugs..and only use map sensor cleaner..no carburator cleaner or brake cleaner..they are way to strong..and they will defect this part..in other words anything other map sensor cleaner..it will eat up the special coating on the sensor ..because they are very micro small area..youll see and pay close attention when your taking it apart ..because it go's back exactly the same reverse process.

Sounds like a mass air flow sensor problem.Take mass air flow sensor off and clean with a non-chlronated brake cleaner make sure its dry before re-installed brake cleaner usally drys quick.

There are two items that could squeak:
If it squeaks when pushing/pulling it on carpet, WHILE NOT RUNNING, then the wheels are squeaking when they rotate on the wheel shaft. If so, one drop of oil at the shaft would fix it.

If it squeaks WHILE RUNNING, mostly while pulling backwards on carpet, then the belt is slipping. You may wish to set the nozzle height setting for a higher pile carpet, or could replace the rubber belt.

Check for vaccum leaks. if none can be found clean the MAF sensor (Mass Airflow sensor) with electronics cleaner. (Tuner cleaner) only . Do not use any other type of cleaner. See if it makes a difference.The MAF sensor is located in the air inlet tube
just ahead of the throttle body If not replace the MAF sensor.
Disconnect the air inlet tube just ahead of the sensor, and then spray the electronics cleaner through the screen at the wire element in the center of the little MAF sensor. Let the cleaner soak in for several minutes, then give it another shot of cleaner. Let it sit another five minutes, then reconnect the air inlet tubing and start the engine.

Typically when that happens your auto focus sensor has become dirty and it takes longer to focus on your subjects. Make sure both your lens and AF sensor are completely clean. Use a soft high thread count cotton cloth to wipe them clean.