Remove screws then using both hands give it a sharp bang on the front edge with the ‘heels’ of your hands.
Three components on top of heater, one shot, cycling stat and NTC, brown wires go to NTC.
Possibly. 😥
Don’t know, bloody stupid idea, there are even screws on either side but the front still wont come off. I advise use of a pressure hose if one is available. :rolls: