(1) The department shall review and investigate the case of any assisted household whose dwelling has been weatherized but which exceeds the calculated consumption level. The department shall determine the cause of the excess energy consumption.

  (2) If, after review and investigation conducted pursuant to subsection (1), the department concludes that reasonable and prudent action by the assisted household will eliminate the excess consumption, the department shall advise the assisted household of measures to be taken to reduce excess energy consumption. If the assisted household does not comply with the department’s suggested corrections, the household shall not be entitled to shut-off protection for the subsequent program year, as long as the household remains in the same dwelling unit.

  (3) If, after a review and investigation conducted pursuant to subsection (1), the department concludes that the excess consumption cannot be remedied by the assisted household, the department shall use available resources and means to reduce the excess consumption.