Its always nice when you find the problem and can get at it.
I updated my same fuse holder to one with a cover, to protect it a bit from the weather.
That fuse holder you have is available on line, and is expandable, but with no cover, I recommend just changing it to a protected style.
The other thing that you need to explore, is why it is drawing that much power? Have you changed the blower fan, as if it is at end of life, it may be drawing too much juice.
The other option, is to install another relay.
Originally Posted by landmarc
i found the trouble ,it's my fuse holder in the front outside who burned
Thanks so much,you are fantastic