88 GT Heater Fuse Blown (Page 1/4)
Pyrostatic SEP 26, 04:42 PM
Hello,

Sometime over the weekend the 25amp fuse for my heater and A/C blew (fuse 8). I replaced the fuse and the heater ran for a second on the new fuse, but when I clicked over to defrost, the fuse blew again. The heater and defrost worked perfectly fine until this weekend.

Can anyone offer any suggestions?
I searched the forum and was unable to find any posts with this particular problem. If I have missed something, a link would be kindly appreciated.

Thank-you.
IMSA GT SEP 26, 05:48 PM
If the blower runs fine with the heater off and it also blows cold air when the AC is on, it may be an issue with the heater resistor. It is in the front trunk along the firewall and is indicated by the purple arrow in the picture.

[This message has been edited by IMSA GT (edited 09-26-2021).]

Gall757 SEP 26, 06:14 PM
It would be a good time to check for a mouse nest. The heater resistor can be trouble.
buddycraigg SEP 26, 06:51 PM
What is the fuse labeled?
buddycraigg SEP 26, 06:55 PM

quote
Originally posted by IMSA GT:

If the blower runs fine with the heater off and it also blows cold air when the AC is on, it may be an issue with the heater resistor. It is in the front trunk along the firewall and is indicated by the purple arrow in the picture.





The resistor only play a part on fan speeds 1,2,3. The resister is bypassed when you have the fan on the high setting.

and funny. I think that is one of my pictures. I'm glad I'm helping out, even if I'm not around.
Gall757 SEP 26, 07:12 PM

quote
Originally posted by buddycraigg:

What is the fuse labeled?



25 amp white.. HEAT/AC
IMSA GT SEP 26, 07:15 PM

quote
Originally posted by buddycraigg:


The resistor only play a part on fan speeds 1,2,3. The resister is bypassed when you have the fan on the high setting.

and funny. I think that is one of my pictures. I'm glad I'm helping out, even if I'm not around.



I had to "borrow" it
buddycraigg SEP 26, 10:27 PM

quote
Originally posted by IMSA GT:


I had to "borrow" it



I feel good that I even recognized it.
Please "borrow" all that you can to help everyone you can.
buddycraigg SEP 26, 10:31 PM

quote
Originally posted by Gall757:


25 amp white.. HEAT/AC



Can someone show me that schematic?
I don't have access to that readily available to those anymore.
Rexgirl SEP 27, 03:27 AM