Old Dimplex storage heater

[AJ16]

There is a old 3.4 Kw one in my office which failed, like you I struggled to get the front off but it's just two screws down each side. The connector block burned out, parts are obsolete so I'm hoping the landlord is going to replace with a new one.

 

[AJ16]

correction: I just checked and it's just a couple of screws along the top that need to come out after the top cover has been lifted off. Once the screws are out pull the front cover up to detach it from the screw slots in the front.