The degree C strip is 124 821 29 67.
Degree F might be 124 820 10 03 if it is still available (replaces 201 821 01 67, 124 821 31 67, 124 821 34 67).

While you have your pushbutton unit out, check your solder connections between the 2 vertical connector boards to the main board. They often develop cracks.