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Old 12-10-2010, 06:17 AM   #1
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High pressure switch on-of, on off

2 year old Trane heat pump--When in heat mode the high pressure switch shuts outside unit off,restarts in 10-15 seconds and repeats 3-5 times. Tech came out and diagnosed a faulty t-stat. New t-stat eliminated problem for 4 days but now it's doing the same thing again. Tech said pressures were right on , so any ideas. Unit is spotless,coil looks new,airflow around unit is clean

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Old 12-10-2010, 12:14 PM   #2
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High pressure switch on-of, on off

sounds like a restriction in the system causing high pressure

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