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Enes
Enes, VOLVO Master Technician
Category: Volvo
Satisfied Customers: 4911
Experience:  18+YEARS WITH VOLVO AS THE MASTER VOLVO MECHANIC&Ase
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My 2012 Volvo MCT125C keeps blowing the fuse for the air

Customer Question

My 2012 Volvo MCT125C keeps blowing the fuse for the air conditioning/heat. The fuse will NOT blow immediately and some of the time it will take a week or more. The AC/HEAT blower fan will work and the fuse will not blow for some time.
JA: Do all the fuses have the correct amperage for the circuits they're in?
Customer: yes, this circuit uses a 40 amp fuse and I confirmed it is the correct socket and I am NOT using a slow blow fuse
JA: What is the model of your '12 Volvo?
Customer: MCT125C
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: I am trying to fix it. I have only replaced the fuse. I don't know where to begin in troubleshooting this type of issue since a short should blow the fuse immediately
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 month ago.
Category: Volvo
Expert:  eric remington replied 1 month ago.

H​ello my name is ***** ***** the ac work properly as in cool well? does heater work properly? does the fan sound noisey?

Expert:  eric remington replied 1 month ago.

d​o you have a way of measuring amperage?

Customer: replied 1 month ago.
The heat and air work very well and the fan is not noisy. I do can try to measure current but it is not easy to access the back of the fuse panel (I don't actually know how to access it). I am confident it will be less than 40 amps, given that the fuse wont blow right away. The issue occurs some indeterminate amount of time after the fuse is replaced and some hours of operation later.
Expert:  eric remington replied 1 month ago.

a​re you using ac or heat when problem occurs?

Expert:  eric remington replied 1 month ago.

a​c compressor or blower motor are likely candidates...you can put an amp probe at the compressor clutch or at the blower motor

Customer: replied 1 month ago.
Ok I will check it out
Expert:  eric remington replied 1 month ago.

yeas let me know what you find