hvacpro
Oct 9, 2009, 05:43 PM
What would cause a liquid line to frost in cooling?
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hvacpro Oct 9, 2009, 05:43 PM What would cause a liquid line to frost in cooling? lyvwyr Oct 9, 2009, 07:24 PM most commonly would be a dirty filter. low airflow-check blower speed wiring,belt (if applicable),blower wheel low freon hvacservicetech_07 Oct 9, 2009, 08:36 PM Normally a restriction is going to freeze your liquid line, plugged drier,orfice or maybe bad txv. hvac1000 Oct 9, 2009, 09:18 PM hvacpro Oct 13, 2009, 04:57 PM Forgot to mention that this is a heatpump, suction presseure goes to zero, suspect restriction,cant see any obvious signs of damage to line set. mygirlsdad77 Oct 13, 2009, 07:28 PM does your suction line also freeze? IF suction is reaching zero or below(pulling a vacuum) you most likely have a restriction(as mentioned before, could be filter drier, orafice, txv). You will also see low or vaccum states on suction side if charge is very low. What does your high side read while low side is at zero? And do you notice the high side dropping also when unit is run for a period of time? hvac1000 Oct 13, 2009, 08:27 PM suction presseure goes to zero Check your metering device for restriction (orifice) OR if TXV bad power head.. hvacpro Oct 14, 2009, 03:49 PM High side reads about 150, this was on a cool day about 70 degrees. Did not run the unit very long and the suction line was not cold. Copyright ©2005-, Ask Me Help Desk
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