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Heat Pump I have a intertherm heat pump , compreser working , fan on outside working , thermostat calling for cooling , large line from compreser to inside coil sweating and cold and still no cool air ??/

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Your inside cooling coil in the air conditioning mode could be frozen over. Change the fan setting to on and operate it that way when in the cooling mode. Turn the air conditioning OFF with the fan ON to clear the coil of frost which should take about 1 hour.

The fact that you have sweat on the large line means that the temperature of the gas inside the line is below the due point of the moisture in the air. A good tech would measure the pressures and temperature of the system to get what is called superheat to determine proper system charge of refrigerant.

Posted on Jun 14, 2008

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