Question about 2001 Mazda 626

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I own a 2001 mazda 626 2.0l 4cyl. The 30A fuse for "additional fan"(I think this is what runs the compressor) keeps burning. The A/C will put out cold air for about 3-5 minutes before the fuse burns. The low side is the only side I was able to check(apprx. 100 psi). Also, the compressor is kicking on and off pretty regularly, especially when the car is idling. Any help would be greatly appreciated! Josh

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  • kcsrec8 Aug 06, 2010

    very helpful. thanks! I will get gauges tomorrow morning and set accordingly. Josh

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100 psi? Holy ****!!! Drain about 95% of that out. Your can should only hold 1.5 to 3 lbs max or about 2 cans of freon. Your causing the compressor to push more than it can handle. Thats why your blowing fues.

Posted on Aug 06, 2010

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I need a little more info please.Where is the fuse for the additional fan,under the hood or in the fuse box inside the car?Exactly what stops running when your named fuse blows?Do you mean the fan inside the car kicks on and off?The compressor is constantly turning when the engine is on,it's just a matter of pressurization or no pressure when you turn on the a/c.100 psi is high for the low side so I don't think you quite have the true low side.You seem to know where to look,just not familiar with what you are looking at by name.Anyhow,please send me the answers to the questions and I should be able to point you toward the right direction.Once I see that I can explain better the system parts and operation and what may be blowing fuses.Thanks,Greg.I am on almost every day by about noonish too.

Posted on Aug 06, 2010

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  • kcsrec8 Aug 06, 2010

    I had 80-100psi when the car was turned off! I'm new! My problem now is while the car is running, i've got 30psi low side, but high side rises and rises(I shut it off at 400 psi). I'm thinking the orifice tube is plugged. What do you think.

  • Greg McCarthy Aug 06, 2010

    It sounds like the condenser isn't working.The evaporator is the beginning of the high side and turns the liquid into gas.The compressor is pretty close to the evaporator and helps move the gas through the system with pressurization to the condenser.The condenser converts the gas back into liquid and sends it back to the reservoir with a pretty short tube.If the condenser is not working,it is unable to convert the gas back into liquid and the gas just accumulates,nowhere to go.That will cause high pressure.The condenser at the opposite end of the line from the compressor.

  • Greg McCarthy Aug 06, 2010

    I am not sure what you mean about the orifice plug.Would you please describe it?

  • kcsrec8 Aug 06, 2010

    It's a little filter-like item somewhere in the a/c lines. It filters trash out and it has an orifice at the end. They only cost about $2. I believe it is also called, or is definitely near, the expansion valve. My buddy is now telling me that this may be under the dash of my passenger side.

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