A house can represent the dreamer to some extent because it is the framework out of which one lives. Fire represents change because it transforms matter into energy. The dream is screaming that she wants to go back to some of her old ways before she engaged in therapy.
The fireman is male specifically because the dream is using the male action part of her psyche to emphasize that it is more about how she does things than it is about feelings. In dreams, males are associated with an action part of the psyche. Female characters in a dream usually represent an emotional part of the mind. This is not absolutely so, but is usually the case.
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