Oce Arizona Printhead Temperature over 200 celcius

Technician came to level my printbed. We'd removed the magnetic table top and he spent the better part of a day tweaking the table and measuring with a dial indicator. I went to print the next day and had two adjacent nozzles out on black that cannot be cleared. Technician came and then found the temperature of the black printhead at around 212 celcius. Also, same with one of the white printheads, although no issues with nozzle clogs there and seems to be printing fine. Says he'll need to replace black printhead and it's a voltage problem.

Anyone ever have this sort of issue? Any recommendations? Seems coincidental given I've had perfect heads for over a year and the moment I get a technician in more problems are created.

I'm running 460xt with 257 inks.

 

Technician opened the printhead and it was pretty worn looking and had to be replaced. Housing interior looked as if it had been stripped. He was thinking it may be from my previous inks (Marabu), which were quite hard on printheads. I'd regularly used flush so maybe that contributed as well. He'd recommended only using isopropyl alcohol from now on.