Admin Table of Contents
What causes high discharge pressure?
One common cause of high discharge pressure is the cooling medium (air or water) flowing across the condenser: either there is not enough or the temperature of the cooling medium is too high. This is normally easy to identify with a simple visual inspection of the condenser.
What should AC high side pressure be?
R134a Pressure Gauge Chart
| Ambient Temperature (°F) | Low Side | High Side |
|---|---|---|
| 90° | 50-55 psi | 250-275 psi |
| 85° | 50-55 psi | 220-250 psi |
| 80° | 45-50 psi | 175-220 psi |
| 75° | 40-45 psi | 150-175 psi |
How do you fix high discharge pressure?
One of the causes that have been established in relation to high compressor discharge pressure is the presence of air in the system. When this takes place, your best solution is to recharge the system. Another is a clogged condenser in which case you will need to clean the condenser so that it will function properly.
Will low refrigerant cause high pressure?
Condenser subcooling is a good indicator of how much refrigerant charge is in the system because low condenser subcooling can mean a low charge. The excess refrigerant will accumulate in the condenser, causing high subcooling and high head pressures.
Should AC high pressure line hot?
The Orifice Tube controls the flow of the refrigerant into the Evaporator. At the Orifice Tube there is a temperature and pressure drop. The liquid line side should be HOT and the Evaporator side should be COLD.
Will low refrigerant cause high-pressure?
What causes high discharge line temperature?
What causes high discharge temperature? High discharge temperature is the result of temperatures in the compressor head and cylinders becoming so hot that the oil loses its ability to lubricate properly. This causes rings, pistons and cylinders to wear resulting in blow by, leaking valves, and metal debris in the oil.
Why is my high pressure side cold?
Most likely problem is a clogged drier. If one is not used on your system the next best guess is a clogged expansion valve. I would make sure they install a new drier during the repair.
Why is my suction line hot?
The external suction line running hot means it’s running on heat mode. The real suction line is inside the unit and runs between the reversing valve and compressor, that part shouldn’t be hot at any time.
Why is my AC pressure too high on the low side?
Finally, if you’re wondering why your AC pressure reads too high on the low pressure side, while the high side pressure remains normal, you might be dealing with incorrect cycling of the condenser. This happens when there is an unusually rapid cutting in and out of the cycle.
Why is my air conditioner temperature so high?
High temperature readings from your AC can indicate damage is occurring to your AC system. It needs to operate within a specific pressure range. High pressure might gradually lead to the failure of the compressor. If not corrected in time, the repairs can cost a fortune.
Why does my car have a high low side pressure?
It is very uncommon to get high low side pressure readings with normal high side readings. If you are experiencing this, this might be because your condenser is not cycling in the correct manner. The cycles are cutting in and out too rapidly, giving those high low side readings. You might not be able to rectify this malfunction on your own.
What does it mean when your air pressure is too high?
Although mechanics tell owners that the high pressure is due to a problem with the accumulator or evaporator that is not likely the case. Most high-pressure readings are a result of the freon or refrigerant not cooling adequately.