Question about 1995 Jeep Grand Cherokee

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Fan for air conditioner and heat runs only part of the time

I noticed the problem on a recent trip. The air conditioner fan would quit running and then starts up again. It quit alltogether yesterday. Today I changed the fuse and started the car. The fan took right off and I thought problem solved. Later today I took the car to pick up my wife and the fan refused to run again. Any advice would be appreciated.

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  • chiflajim Aug 18, 2008

    I have checked for loose wires and my fuse is good. The air conditioning and fan seem to work good early in the morning when it is cool; they do not work when it gets warner out. The freon level is good. Could this be a relay problem; if so, do you know where the relay is located and would this be a replacement job I could do?

    Thx, Jim (chiflajim)



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Check whether the fuse is connected properly.check any loose connection.keep me updated for further sugestion

Posted on Aug 15, 2008

  • tech expert12 Aug 15, 2008

    Tips for AC Repair

    There are several reasons because of which the AC may function errantly. Some of these require some specialized skills but some of these can be handled manually. Some of the domestic check-outs and repairing tips for car ACs are given below:-

  • Refrigerant Loss - Traditional ACs suffer frequently from the refrigerant gas loss during winter season due to loss of lubrication of compressor seals, because of its inactivity. Earlier the refrigerant gas used was R12 but it was replaced with R314A, because the former was more harmful to the environment. If your AC still contains R12 as refrigerant, then it will be substituted by the new one with its kit during the course of repairing. If you turn on The AC in winter, it will prevent drying of the refrigerant seal, by continuous lubrication of the oil. Moreover, AC in cold months reduces the internal fogging effectively and you will get the proper heat, with your heater on.
  • Dirty Condenser - Condenser is fitted in the front part of the radiator and it converts the refrigerant vapors into tiny droplets, which ultimately cools the inside atmosphere of the car. If the condenser is full of scrap then the airflow through it may be interrupted and hence the cooling will substantially affected. Thus, condenser should be thoroughly checked and cleaned.
  • Impurity Blockades - Some impurities or debris may get collected into the valve from where the refrigerant enters into the evaporator. This may lead to lesser cooling and ultimately compressor damage. So the obstruction must be cleared to allow free flow of refrigerant, and thus maintaining the effective coolness of your AC.
  • Contamination Due to Moisture - The process of condensation may be reversed and formation of ice will start due to presence of moisture or air into the metering tubes inside the AC. The air might enter into the orifice because of the leakage in the tube. So any leakage in the system must be checked and repaired properly.

    If the issue doesn't get resolved by any of the above discussed methods, then your AC might be suffering from a serious mechanical failure, which includes- compressor damage, metric orifice failure, ill-functioning pressure switches etc- then it is advised to get your car checked by a licensed mechanic.

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