Not entirely sorry, with great fire raging, to find cool things (13)

'cool things' is the definition.
(refrigerators keep things cool)

'not entirely sorry with great fire raging' is the wordplay.
'not entirely' means to remove the last letter (not all of the word).
'with' is a charade indicator (letters next to each other).
'raging' indicates anagramming the letters.
'sorry' with its last letter taken away is 'sorr'.
'great'+'fire'='greatfire'
'sorr' after 'greatfire' is 'greatfiresorr'.
'greatfiresorr' is an anagram of 'REFRIGERATORS'.

'to find' acts as a link.