Dometic AC/HP (1500BTU's) ambient temp sensors

[thestarfinder]

Monaco Windsor 2001...Dometic Model # 651816CXX1C0 (1500BTU's)
E4 Code is: open circuit or Outdoor ambient Temp. sensor....
I have replaced a few of these temp. sensors in the last few years..
Is anyone having the same issue? I have 2 units and they go bad on both units...
Is there a cause anyone knows about or do they just go bad in time?? Thanks in advance, Tom
BTW I'm getting pretty good at replacing them 🙂

[Ivylog]

Two 16 year old in 04 Dynasty still original

[dougrainer]

I have replaced maybe 2 or 3 in 20 years. But, 20 year old HP that are still original is amazing. Doug