Car ac high side pressure fluctuates

I have a fully recharged AC system that blows very cold.. I just replaced my a/c fan with a factory one that works perfectly fine as well.. But when Im driving the car the A/C temps fluctuate from cold to hot, to warm, then back to cold any time im not cruising.. Even when Im not driving the car hard.. seems to happen anything over 3k rpms.

The lower high side pressure may be from an undercharged system and the TXV is keeping the low side at 30 PSI. The old systems used a sight glass to charge the systems. Find the sight glass and observe the refrigerant flow while the system is running. If the sight glass is clear liquid the system is fully charged. 96 honda civic high side pressure fluctuates between 200 & 250 - Answered by a verified Mechanic for Honda ... car has new expansion valve and new compressor and drier.system evacuated for over an hour.original problem was weak clutch coil.customer decided to go with new compressor,drier and expansion valve..

Jul 28, 2022 · How an A/C Expansion Valve Works. Bad Car A/C Expansion Valve Symptoms. 1) Warm Air From Vents. 2) Frost on the Vents. 3) A/C Compressor Always On. 4) Inconsistent Airflow. 5) A/C System Failure. A/C Expansion Valve Replacement Cost..




Jan 06, 2016 · 2. Unable to cool the car. If either of the AC pressure switches fails, then the system will have a difficult time maintaining the pressure required to function properly. If the pressure is not right, then the AC system will not be able to produce the cold air required to adequately cool the cabin. You may notice that the cabin takes longer ....

One of the basic reasons for AC being less efficient could be the AC low side pressure too low or imbalance of power and pressure. Nevertheless, there are several other reasons which we will highlight in this article. Moreover, we will understand how the AC works, why it is necessary for a vehicle, and what causes the AC to be low in performance.

Jul 22, 2022 · If the air conditioning isn’t blowing cold air and the low side pressure is too high, it could be caused by issues with the condenser fan. However, there’s also the possibility that the system has gotten overcharged with too much refrigerant. 1. Defective Condenser Fan. When the fan becomes damaged, airflow through the condenser is diminished..