My daughter's '82 300 D (123) keeps blowing the 16 amp heater blower fuse. I notice it blows when in defrost mode which places the blower in its fastest position.

I see in a parts book that there is a 30 amp repair kit for this for about $30. Is this repair kit a 30 amp fuse holder with push-on connecters that attach to the terminals in the fusebox where the 16 amp fuse is? If so, I imagine I could pick up any 30 amp holder and fuse, solder two connectors to it, and plug it on. Is this correct?