I have primatic heating system(i know iknow but i cant afford to change it!) but anyway my thermostat/element has stopped working ,I checked with a tester screwdriver and no power passes through the element. I cannot seem to remove the thing for love nor money with out the possibility of tearing the tank,it just wont budge have tried wd40 ,heating it up,nothing works. But if i tear the tank it may cost me a fortune, not the £12 for the elemnt but a new primatic tank,(do they still make them,then if they dont a whole new central heating system!! I really dont want that at the moment ,so wondering if anyone has any ideas on this one? thanks folks