To dream of a radiator represents a person or situation in your life that you can always apply pressure to in order maintain a comfortable atmosphere or lifestyle. Alternatively, it may reflect a situation that feels wonderful never having to care.
Example: A man dreamed of having to fix a rusty radiator. In waking life he was always using and scaring his son into paying his bills to live comfortably. His son eventually went bankrupt and he had to find ways to get him making money again.