Temp Controls Switch to Celsius

[cotten]

For some unknown reason my HVAC controls and external temp display have switch to celsius. Everything I've found searching says this shouldn't be possible to change.

What could have caused this? Anything I can do to correct it?

 

[CookieRoe]

Can we see pics??

For years I thought it was virtually impossible. Been covered in old threads.

 

[exo_toy.]

Sounds like you've been hangin aboot too close to Canada, eh.