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High Pressure too high

ehdz12 on Wed September 14, 2011 4:54 PM User is offline

Year: 1994
Make: Honda
Model: Civic
Engine Size: 1.8
Refrigerant Type: r134a
Ambient Temp: 91 F
Pressure Low: 40
Pressure High: 230
Country of Origin: United States

Today a shop did a recovery, vacuum, and added about 1.8lbs of refrigerant. The high pressure seems too high and vent temps are around 58 F at an idle. The condenser fan works. The Compressor is brand new. Could this be a condenser problem? Also the drier and expansion valve are both new.

Edited: Wed September 14, 2011 at 4:56 PM by ehdz12

mk378 on Wed September 14, 2011 6:30 PM User is offline

I think the rated charge is 18 to 19.5 oz, or slightly under 1.2 lbs. So 1.8 is way too much. Also beware of too much oil, does about the same thing as too much refrigerant.

ehdz12 on Thu September 15, 2011 12:31 AM User is offline

Thanks! I've been looking everywhere for the system's capacity. I'll take it back tomorrow and get it charged to the right amount. On my drive home tonight the vents temp was 42 F which makes me wonder if there is insufficient cooling or "condensing" going on in the condenser when it is really hot out. During the day when it was 100 F the vent temp would not drop below 68F.

mk378 on Thu September 15, 2011 12:35 AM User is offline

The main result of overcharging a TXV system is that liquid refrigerant will back up into the condenser and reduce its performance.

TRB on Thu September 15, 2011 12:36 AM User is offlineView users profile

Mitchell lits it at 17 to 21 ounces. Pretty big margin if you ask me. Especially for a scroll compressor.


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Edited: Thu September 15, 2011 at 12:37 AM by TRB

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