Thermal Compound is used by GHD on the ceramic heaters for even transfer of heat across the aluminium heater plate.
Over time the compound hardens and becomes crumbly and will no longer be effective.
When you replace a heater either because it is faulty or simply as part of a service we recommend cleaning the old compound from the heater plate with an alcohol based cleaning fluid and then re-applying a very thin layer of new compound.
This will ensure even heat transfer.
From our experience the best thermal compound is that produced by HALNZIYE®´and it can be purchased here.
Please remember that you only need a thin layer so one sachet is enough for two heaters.