why does my a/c fuse keep melting
CF Veteran
Joined: Mar 2010
Posts: 1,030
Likes: 2
From: Elizabethtown, pa
Year: 1994
Model: Cherokee
Engine: 5.2
Wow, either blower (most likely) blower resistor or short to ground
Actually, if your blower worked fine previously, I would vote the blower resistor.
Actually, if your blower worked fine previously, I would vote the blower resistor.
Thread Starter
Member
Joined: Feb 2010
Posts: 303
Likes: 0
From: Kingwood, Texas
Year: 1989
Model: Cherokee
Engine: 4.0
i just got a new fan from advanced auto for $27. going to install it this weekend. i will post if it made any difference. if this doesn't work, i will check the resistor and control switch too.
Caracticus Potts The Mod
Joined: Jul 2009
Posts: 5,298
Likes: 9
From: Hainsville, NJ
Model: Grand Cherokee
I would look behind that fuse panel if I was you, your fuse melted but did not blow. That looks more like the result of a loose fit condition, which cause resistance which in turn causes that kind of heat.
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Senior Member
Joined: Jul 2011
Posts: 560
Likes: 26
From: West Covina, Ca.
Year: 1988
Model: Cherokee
Engine: 4.0
Note from DJ to jtcomanche
First welcome to the forum.
Next it will help if you take the time to fill out your profile; so everyone will know the important details about your Jeep.
Now if you have a 89 Cherokee with a 15A fuse that is blown in the Blower slot; if my notes are correct it is supposed to be a 25Amp Fuse not a 15Amp fuse.
First welcome to the forum.
Next it will help if you take the time to fill out your profile; so everyone will know the important details about your Jeep.
Now if you have a 89 Cherokee with a 15A fuse that is blown in the Blower slot; if my notes are correct it is supposed to be a 25Amp Fuse not a 15Amp fuse.
Last edited by djgrayxj; Aug 20, 2019 at 04:31 PM.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Note from DJ to jtcomanche
First welcome to the forum.
Next it will help if you take the time to fill out your profile; so everyone will know the important details about your Jeep.
Now if you have a 89 Cherokee with a 15A fuse that is blown in the Blower slot; if my notes are correct it is supposed to be a 25Amp Fuse no a 15Amp fuse.
First welcome to the forum.
Next it will help if you take the time to fill out your profile; so everyone will know the important details about your Jeep.
Now if you have a 89 Cherokee with a 15A fuse that is blown in the Blower slot; if my notes are correct it is supposed to be a 25Amp Fuse no a 15Amp fuse.
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Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
CF Veteran
Joined: Nov 2015
Posts: 2,863
Likes: 201
From: syracuse ny
Year: 1997 230,000 miles
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
Fuse socket is toast from a bad connection behind it. Only way is to bypass it, There could be others in the same shape.
Newbie
Joined: Jan 2018
Posts: 3
Likes: 0
From: Central Pennsylvania
Year: 1990
Model: Comanche
Thanks everyone for the info! I'll check out Cruiser54's link. I have a 1990 Comanche with a 25A fuse that is melted. The socket looks like the OP's photo, but worse. A new 25A fuse gets the blower motor going again, but I was looking for a safe and proper fix. This just became mine recently and I'm told that fuse used to blow about twice a year. Not sure if this is what happened each time or not.