bpwain Posted November 6, 2018 Share Posted November 6, 2018 Hi folks, I've been lurking in here for a good while, but this is my first post. Hope you may be able to help...... After months of searching, today I've put down a deposit on what will be my first subaru, a 60-plate WRX STI saloon. My order has come with a few conditions for the dealer to meet, the biggest of which is to fix an annoying squeak from the A/C... But they're struggling so I'm hoping for some help in diagnosing it for them so I can get what seems otherwise a very good car.If you have just the blowers on, everything is fine but as soon as (and only when) the A/C is switched on there is what sounds like a squeak or chirp almost like a fan squeaking. This can only be heard in the cabin, the only noise from the compressor under the bonnet is subtle and nothing like the squeak heard inside so I don't feel that this is the cause.Any suggestions??I did wonder if there is a secondary fan in the cabin for A/C only?? Seemed unlikely to me.I'm told that so far the dealer has vac tested and re-gassed the system and this hasn't fixed it. Am I correct in thinking that there's a cabin air filter and blower unit housed behind the glovebox? Any info gratefully received. Cheers,Ben Sent from my KFSUWI using Tapatalk Quote Link to comment Share on other sites More sharing options...
Jay762 Posted November 7, 2018 Share Posted November 7, 2018 Wotcha and welcome - There is a pollen filter in the glovebox but that wouldn't give a squeak as you describe - dont know about a secondary blower this shows the pollen filter and blower https://parts.northendsubaru.com/a/Subaru_2010_STI-S-SEDAN-25L-TURBO-6MT-4WD/_54104_6025965/HEATER-SYSTEM-HEATER-SYSTEM-BLOWER--COOLING-UNIT/G12-720-03.html Quote Link to comment Share on other sites More sharing options...
bpwain Posted November 8, 2018 Author Share Posted November 8, 2018 Thanks for the reply.I've also now found a workshop manual, and yes as suspected it's a single blower but uses doors/flaps to direct the air. My guess is that there's something going on with either one of these doors or a bit of debris around the evaporator.Hopefully the dealership technicians can trace it tomorrow, so far they've had no luck :-(Sent from my SM-G935F using Tapatalk Quote Link to comment Share on other sites More sharing options...
Jay762 Posted November 8, 2018 Share Posted November 8, 2018 Sounds good fingers crossed - the picture doesn't show the small rodent in place to turn the blower wheel - maybe when you are selecting aircon it is too cold for the little fella 😀 1 Quote Link to comment Share on other sites More sharing options...
bpwain Posted November 8, 2018 Author Share Posted November 8, 2018 Looks like they've given up and are now saying to me that they can't fix it. Pretty gutting as it's otherwise a nice car. Not sure how big of a rabbit hole it could be if I took it :( Quote Link to comment Share on other sites More sharing options...
Jay762 Posted November 9, 2018 Share Posted November 9, 2018 I think you are correct in associating the flap location and movement with the squeal. Dependant on how much they would discount the model I would consider it and then pull the lot apart. I disassembled my 08 STI to remove a load of leaves from the fan as someone previously had removed the filter. It all comes apart quite easily Quote Link to comment Share on other sites More sharing options...
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