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Majeed Sha Posted on May 29, 2015
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Carrier ac E4 error - Carrier Heating & Cooling

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jack morton

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  • Master 523 Answers
  • Posted on May 29, 2015
jack morton
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Joined: May 19, 2015
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If this is a ductless mini split e4 appears to be an air temp sensor on the indoor or outdoor unit that is sensing an abnormal reading. Check air filter and both I.d & o.d coil cleanliness. Its hard to troubleshoot without a model number. If its a 38g or 40g in the model number its a discharge temp sensor reading high temp situation (dirty o.d. coil, low freon, refrigerant restriction. Again, need a model #

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