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Old 04-20-2021, 04:16 PM   #1
therimgreaper
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2012 WRX Hatchback
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Default 2012 WRX - clock, HVAC working intermittently. Fuse box issue?

My 2012 WRX has an electrical issue that has been getting worse recently, and I was wondering if others have had similar experiences.

While driving, the blower fan will click on and off and the dash clock will disappear and reappear even though I'm not touching the controls at all. At first (2 years ago) I would notice that the blower would cut out momentarily when hitting a large bump or pothole on the road, but this issue has gotten worse recently. If the blower is running, it will click on and off several times in a few seconds, so I have resorted to turning off the system entirely to prevent the relay burning out or other issues.

I think I have isolated the issue to the fuse box, and to fuse 31 (Auto air conditioner unit, Integrated unit). I tried replacing the fuse with a brand new one without much success. Putting pressure on the fuse in different ways will give and take power to the blower/clock. The wire harness leading out behind the box seems fine, and playing with them doesn't result in much change. H

Has anyone else had a similar issue with the fuse box, and any success with fixing the issue? Should I just replace the fuse box outright? Or does anyone think that there may be a different issue at hand here?

I tried searching through old threads but didn't find any applicable threads. Feel free to share them if there's something I missed.
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Old 04-20-2021, 06:31 PM   #2
Mulder
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Does the fuse feel tight in the socket? It could be that the contacts in the fuse box have spread apart a bit and aren't making a good connection with the fuse. You could try using a small screwdriver or other tool to gently push against the contacts to tighten them so they grip the fuse better. Obviously be careful not to short anything out when you do this.
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Old 04-21-2021, 09:49 AM   #3
therimgreaper
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Quote:
Originally Posted by Mulder View Post
Does the fuse feel tight in the socket? It could be that the contacts in the fuse box have spread apart a bit and aren't making a good connection with the fuse. You could try using a small screwdriver or other tool to gently push against the contacts to tighten them so they grip the fuse better. Obviously be careful not to short anything out when you do this.
Thanks for chiming in; I actually did ever so slightly bend the prongs of the fuse in hopes to make a better connection between the fuse and the terminal. This worked for several months, but after hitting a particularly bad pothole this weekend the problem returned. Otherwise the fuse is tight in the socket, which was why I was wondering if there could be some other issue at hand or if it's just this one socket in the box.
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Old 04-21-2021, 10:27 AM   #4
Mulder
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15 WRX/11 CRZ

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It's hard to say without a lot more troubleshooting. There could be a problem with the wire crimp at one of the fuse terminals, to get to that you'd have to drop the fuse box and extract the wire and terminal to inspect it.
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