Question about 2003 Ford F250 Super Duty Crew Cab

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AC fuse blows a few minutes after turning on AC unit. I replace the fuse and the blower will work. shortly after I turn it to AC the fuse will blow again

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The ac clutch is most likely bad,but if the blower motor is going out ,this could happen also,because of the extra load on the system.

Posted on Sep 13, 2010

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Posted on Jan 02, 2017

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Also more help solutions recommended. Click the link below :---
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it sounds to me like a AC resistor issue i have a beemer that did that same thing to me and it turn out that it was my ac resistor it would burn out my 30 amp ac fuse in 2 to 3 minutes usually when the resistors in a circuit break they tend to burn out the fuses as a warning. easy way to find out is by putting in a new fuse and after a minute go touch the negative lead on you battery if the cable is really hot then there's a short in the circuit or in the case of your ac it would be a broken resistor.
http://www.oreillyauto.com/site/c/search/Blower+Motor+Resistor/02627/C0331.oap?make=Ford&model=Mustang&year=1995&vi=1134166
there simple to get and simple to replace.

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Does it blow the fuse if you unplug the blower motor. The motor might be shorted.

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sounds like a short some where, start by replacing fuse, leave a/c off, turn heat on, does it blow fuse? if yes then bad blower motor. if heat rruns then turn on a/c if that blows fuse then you might have bad a/c compressor . start there. hope this helps.

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Your fan seems to be drawing way too much current, common with fan motors of all kinds when they are going bad. It will still blow, but hot wires and blown fuses in the normal circuit indicate you have an excessive load in the circuit. Fan motors create this condition regularly, but are often ignored since they are "still blowing."

Here's a cheap, easy way to test my theory:
Try a new fuse, the proper amperage, but leave the blower motor unplugged at the blower itself. That will tell you in a few rides if the blower was the culprit. (Which it most likely is.) I bet your #20 fuse will stop blowing and no more smoking pink wires! Hope this helps. Remember, blower motors are cheap, traffic tickets and dash fires are not. The blower motor draw is the logical thing wrong with this picture. Good LUCK! TT

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