Plasma intercooler

The plasma intercooler is a starship system used to provide plasma coolant to the warp drive and other critical systems.

A failure of a plasma intercooler will cause the warp drive to overheat or possibly fail to work altogether. 

Chief Miles O'Brien took the safeties of the USS Defiant (2370)'s plasma intercooler offline and never had any problems. Ensign Nog did the same on the USS Valiant (NCC-74210) in 2374.