After a 4–0 win at the Camp Nou, in which Madrid reached the final of the Copa del Rey for the first time since 2014, Ancelotti again introduced the boiler.
“The boiler has returned to the correct temperature at the most critical moment of the season,” he said.
Benzema’s own form has fluctuated this season, from moments of high quality to weeks sidelined by injury problems.
The 35-year-old Frenchman spent most of October and November on the sidelines and missed the World Cup with a thigh problem.
Benzema failed to score a goal in the group stages of the Champions League but hit three against Liverpool in both legs of the last 16 clash.