Engineer diagnosed the leak by removing the top panel. He did not attempt to remove the front panel. When left alone for 5 minutes a smell of very hot insulation was obvious. He told me that a new component was required as the motor was sounding very gritty. Component cost in excess kof £300.00. Ordered from Germany, fitted 10 days later. Result. SAME LEAK! Recalled to investigate, a different engineer, same company. Front removed. Hole obvious in pipe, it was wet. Ordered, replaced, no leak. Be wary of who you trust. Engineer manager has still not contacted me after 4 phone calls. Complaint ongoing.