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R32 Aircon Blowing Fuses.

77xc

By 77xc,
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77xc Contributor

77xc

Posted
Posted

Hey guy's I know this has been done to death but every post i have read hasn't fixed my problem. The air con in my 32 hasn't worked since i bought it . Ive sent it to a mechanics and $300 later its been re gassed (which wasn't needed) and they proceed to tell me its not fixed.

Got home checked the fuse under the dash its blown, replaced it air con works perfect for about 20 min and the fuse blows again. I've replaced the fuse many times since and now it blows within a few seconds of turning on the A/C. I've run the diagnostics on the climate control and have established my blend door servo motor is rooted. What i want to know is if this would be causing my fuse to blow? Compressor seems fine, clutch kicks in, all relays seem fine I'm stumped at what else it could be and don't particularly want to go to an auto elec if i can avoid it.

Also worth noting my condenser fan also does not work, has power to the fan and when the fan is hooked directly to a 12v source it runs fine, What could this be?. Any help would be greatly appreciated

cheers Jerry

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MrStabby Grand Master

MrStabby

Posted
Posted

Hey guy's I know this has been done to death but every post i have read hasn't fixed my problem.

It would be helpful if you let us know what you found, so we don't just repeat what you're already read.

For me this happened when the mag clutch solenoid pulled too much current. Measure the resistance of it with a mutlimeter. Off the top of my head its supposed to be 3.8ohms, but if you measure it and post back ill look it up.

There's a thread on here somewhere that shows you how to wire up the condensor fan so it blows whenever the air con is on (which is a worthwhile mod even if the fan is working normally)

t_revz Grand Master

t_revz

Posted
Posted

Fan isn't for aircon. It's for engine when too hot

I would be leaning towards compressor. Plenty draw too much power after they have warmed up. When its popping straight after turning on, disconnect compressor and see if it stops

MrStabby Grand Master

MrStabby

Posted
Posted

Cheers, checked the resistance of the clutch and its only approx 1.6ohms according to my temperamental multimeter. I'll unplug the compressor and see if it stops blowing fuses this arvo.

Ok the resistance is supposed to be 3.5 ohms. With 1.6 you'll be pulling a lot more current so that correlates with blowing fuses. Pretty sure you'll need a new solenoid for the mag clutch.

  • 2 weeks later...
ck_chino Enthusiast

ck_chino

Posted
Posted

it is definitely ur ac clutch electromagnet which engages the pump that is drawing too high of a resistance. ohms's law states that I= v/r, so if u plugged in ur numbers u r exceeding the current rating of the fuse. i had the same exact situation, and i found a right up up on here to change the coil behind the ac clutch not a fun job but yea it can be done in the vehicle.

have fun and good luck

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