Overhead display ?
Senior User
Joined: Mar 2009
Posts: 354
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From: Patterson, Ca.
Had mine repaired by this guy. Been over three years and still like new.
Ford F150 F250 F350 Super Duty Temperature Compass Overhead Console Disp Repair | eBay
Ford F150 F250 F350 Super Duty Temperature Compass Overhead Console Disp Repair | eBay
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I see a lot of mention of the components melting from a foam pad insulating a tiny component, and possibly coming undone again from heat. Nope. The manufacturing process floats the board over a solder bath, or has a robotic device to apply the solder quickly. Mass production frequently leaves a sub-standard solder joint that passes initial tests, but vibration alone will work the uber-thin solder joint loose. Vibration? In our trucks? Naaah. The solder melts at well over 500 degrees F, so I think if anything got hot enough to melt solder - the burnt hole in the foam would indicate this. When we apply solder manually, the solder joint is much thicker - so the road vibration is far less likely to cause an encore performance.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
As Rich mentioned, hand-soldering will leave a thicker solder joint, and is less-likely to fail.
Eutectic (SN63) solder has a melting point of 361 degrees F, and is the most-commonly used solder for surface-mounted devices. Of course, Ford (or their supplier) may have used another alloy, but stuff begins to suffer when exposed to excessive high-heat, and I suspect they used the lowest-melting they could get, i.e. SN63 (or 63/37 if you prefer).
A properly-designed circuit wouldn't allow any component to run as warm as these resistors do. THAT's the basic flaw here, an inadequate design.
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Eutectic (SN63) solder has a melting point of 361 degrees F, and is the most-commonly used solder for surface-mounted devices. Of course, Ford (or their supplier) may have used another alloy, but stuff begins to suffer when exposed to excessive high-heat, and I suspect they used the lowest-melting they could get, i.e. SN63 (or 63/37 if you prefer).
A properly-designed circuit wouldn't allow any component to run as warm as these resistors do. THAT's the basic flaw here, an inadequate design.
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