The thermal‐induced self‐healing mechanism of reversible covalent crosslinking polymer materials based on the DA bonds has been investigated. 16 The furan–maleimide adducts in the PUDA materials, as a promising motif, can reversibly undergo retro‐DA reaction and DA reaction at a higher temperature induced by electrothermal or photothermal effect of CNTs, which causes a concomitant reversible .