Depends on the fridge really I suppose. 'High' temp or Freezer section? Some could have (& I think it unusual for a normal domestic fridge) a low voltage heater embedded in the door frame or in your case the door, to reduce condensation &/or to stop the gasket sticking & pretty much the same as the Rail Heater on a Supermarket freezer although I have never seen one on a domestic fridge. No idea why voltage would normally be fed to a door though.
The cabinet shell these days is sometimes used as part, if not all of the Condenser Heat Exchanger so can be warm but never noticed ours being hot. It is an Aussie built Westinghouse. Does it have an inbuilt Ice maker?
Maybe my "Professional Eastern Seaboard Colleagues " [smilebigeye] may be able to throw some light on this as I have been out of the Domestic refrigeration side of things for quite a few years & many things have changed.
That'll be 200 quid thanks. Kerrching.[smilebigeye]

