Possibly Damaged Heater from TX Freeze - Question

Everything seems to have made it out fine from the freeze except maybe the 400k BTU Hayward heater (the most expensive bit). The heater is dripping water at the moment, could be ice is still in it as this is the first time I've run it since the freeze. Assuming the worst and it's a cracked pipe in there, and assuming also that only the water path is compromised, can these things be repaired? Or is a full unit replacement the only way forward?

Thanks!