This is a fun story and hopefully others will also learn from my experience too!
I picked up the car at 20 months old as a demonstrator model, in May 2014. I started using the wipers around September 2014, and initially they were fine. Throughout November and December, when Vancouver gets bombarded with the most rain of the year, the left-side wiper began squeaking every few turns. Only super-heavy rain would allow it to be quiet. I removed and reinstalled the blade, and cleaned it thoroughly, and it didn't help.
The rainy season ended early and I forgot all about the issue. In July 2015, during a 3-month heat wave that caused a drought in western Canada (the government even had to enforce water restrictions!), I finally remembered the wiper and asked the dealer to replace the left-side wiper blade during a service appointment. This cost me $19 + tax including labour. After taking my car back, I tested the wipers once and they seemed good.
During the heat wave my car was always parked outside, often under the hot sun without any shade, while I was at work. I didn't realize this would be a problem until much later.
The rainy season finally returned in October 2015... and when I turned on the wipers, I swear the squeaking was MUCH worse than it was with the old blade that originally came with the car! This was quite shocking since the blade was just purchased 4 months prior. I repeatedly tried cleaning the wipers and my windshield manually with soap, and it would be a temporary fix that lasted one day at best. Even in heavy rain, the squeaking could be heard. I was too busy to book a dealer appointment so I just turned up the volume on my stereo and lived with it.
3 weeks ago, the right-side wiper blade began to squeak too, during an unusual cold spell (temperatures dropping to -10C, not common in Vancouver). Fortunately, I'd finally booked a dealer appointment for December to fix the 15S16 door-latch recall. That's what I did this morning... not the best way to begin my Christmas holidays.
At the dealer, I informed the service advisor of the problem, stressing that the ear-splitting squeaks were happening with a nearly brand new wiper blade. I suspected that the rest of the wiper assembly (the part actually connecting to the car) was to blame since the motor wasn't always turning at a consistent speed. Since blades aren't covered under the Ford ESP, I was hoping I'd be right because I didn't want to pay for any repairs.
I finally got my car back this evening, and it turns out that they ended up replacing both blades after all, and I was out $40. The advisor explained that even though the left blade was brand new, it had become misshapen (especially the rubber) during the summer heat wave, and the cold weather this month made the problem even worse, with the misshapen rubber hardening into an improper shape. At least these two new blades were finally as silent as I'd wanted.
Moral of the story: Do not get wiper blades replaced during the hot rainless part of the year. You could risk throwing away good money (like I did) by having to replace them yet again prematurely.
I am curious though, are all car wipers generally this vulnerable, or is Ford sourcing lower-quality parts? My old Fusion had somewhat loud wipers, but they didn't emit ear-splitting squeaks, and I never had any work done on the wipers at all in the 2 years I owned it (not to mention at the time I lived in Ontario which has more extreme summers and winters). My parents' Lexuses also haven't had the wiper blades replaced for a few years, though those cars didn't spend as much time in the hot sun as mine does (shaded carpark at my dad's office), and they're still totally silent.
Anyway, with this problem taken care of along with the 15S16 recall, my car is finally trouble-free for now! I don't even have 25,000 km on it yet so it may be too early to tell :P
Edited by machoman1337, 21 December 2015 - 09:59 PM.