Lifting a porcelain tile without damaging heating element

[CK2]

I have laid porcelain tiles on the recommeneded adhensie on a wetroom shower former. after some months use noticed a crack in a tile on the former area.

How do I lift this tile without damaging surrounding tiles or the heating element underneath so I can relay another (yes I have some matching spares)?

 

[roughcaster]

Very difficult to repair i would imagine,,, it would be so easy to damage the u/f heating system itself. Most people would walk away from a job like that. Like many modern things people use nowadays, it's nice to have, as long as nothing goes wrong with it,,, that's when the problems start.

 

[big-all]

assuming you know the thickness off the tiles say 9mm use a bosch 180e 'angle grinder or similar with tape on the blade or a lump off wood for the nose to sit on allowing 8mm maximum depth off cut 'cut away at the grout until clear

if they are still difficult to remove take a 6mm masonery drill tape several turnes at 8mm drill down 3mm then angle at 45mm do this several times to weaken tile and allow a screwdriver to be levered off the same tile or another group off tiles with 12mm ply off at least 12" SQUARE to spread the load