Furnace question

My furnace has been examined by 2 different heating/air companies and both have declared it unserviceable due to a door frame blocking access to the upper compartment of the furnace where the coils are. The filter can be replaced and the flame injector area can be accessed as well, but both companies have said that maintenance cannot be done because the coils are not accessible due to the door frame blocking it.

The door frame issue was present on home inspection, in the picture documented by my home inspector, but the furnace was deemed in good shape. Is this something that should have been caught and held liable for by my home inspector?

Thank you for your help!