AC Repair Company: What Makes The Suction Pressure Of Your AC Increase | Plano, TX

AC Repair Company: What Makes The Suction Pressure Of Your AC Increase | Plano, TX

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Suction pressure is the force of the refrigerant gas when entering the air conditioner compressor from the evaporator. It is also known as low side pressure or suction and is critical in diagnosing the operation or performance of the AC system.

A healthy air conditioning unit shows a balance between the suction and the discharge pressure. Any imbalance between the two pressures indicates a problem with the air conditioner unit that will require the attention of a certified technician from a reliable AC repair company in Plano, TX.

The low side pressure is measurable when the compressor is operating, and the value should be in pounds per square inch (psi). It is important to note that the pressure can cause either surge upwards or drop to lower levels, which are signs of failing AC components such as the condenser coil and undercharged refrigerants.

Fortunately, a trained contractor from a renowned AC repair company can fix the problem of rising pressure as long as the compressor piping and amperage are in good condition. The following are some reasons behind high suction pressure in the compressor.

Dirty Condenser

Dirt in the coils condensing unit can lead to high suction pressure. The condenser rejects the heat load coming from the evaporator and the compressor. The condensing equipment is susceptible to dirt and debris because it is installed outside.

Without routine tune-ups and cleaning of the system by a maintenance crew from a trustworthy AC Company, the debris will clog the condenser coils, making it a hassle for the system to cool the refrigerant and discharge the heat outside. The blocked coils will make the temperatures too high at the outlet of the evaporator.

The extreme heat will also be at the inlet of the compressor, leading to high outlet temperature and pressure and suction pressure. Since pinpointing the actual reason why your AC is not working is not easy, contacting a reputable AC Repair Company in Plano, TX, is a priority to your indoor temperature comfort.


An air conditioner dryer, also known as a receiver or hydrator, can also make the suction pressure rise. It is between the expansive valve inlet and condenser outlet. The dryer is a holding component that receives the refrigerant from the condensing unit, ensuring the liquid form of the coolant moves to the expansion valve. The receiver also has a moisture absorbent that dries the refrigerant for efficiency.

However, it is also prone to block because of the moisture it absorbs, allowing less humidity to pass through to the evaporator. The insufficient moisture at the outlet will increase the heat and pressure, making the suction pressure also rise, affecting the cooling efficiency of your air conditioning unit. At this point, you will require the services of a reputable AC Repair Company.

Leaking Compressor Valves

Disc valves in a compressor help in cases where the temperatures and the pressure in the compressor or evaporator are too high. They have concentric rings and undergo heat treatment to withstand extreme heat and pressure in the outdoor units.

When the discharge valve of the compressor leaks the compressor will be unable to compress the refrigerant to flow to the evaporator to suck heat from your living space. The failure to compress the coolant leads to high temperatures and pressure at the evaporator outlet because of adequate refrigerant, causing the suction pressure to rise.

The suction valves can also leak, leading to low discharge pressure that will make the compressed air pass through. The leakage makes the suction valve overheat, causing additional issues such as high suction pressure that will force you to call a nearby AC repair company.

Overcharged Compressor

The refrigerant is an essential part of the AC unit in your home. The coolant helps in the refrigeration process by removing the heat from your house and absorbing the warmth from the outside air. The refrigerant should be replaced by a qualified technician from a renowned AC repair Company and has to be the same as the factory-set amount to perform at its peak.

If there is an insufficient amount of the coolant in the system, ice will form in the evaporator, and there will be low suction line pressure and temperatures. The low pressure restricts the ability of the refrigerant to suck the heat out of your rooms.

It also reduces conditioned airflow, making your house uncomfortable. This will need the attention of a technician from a nearby AC repair company to prevent a breakdown of the compressing unit. The low refrigerant level will also lead to the overheating of the evaporator and compressor.

When the compressor is overcharged with more refrigerant than its recommended amount, you will also experience issues with the AC. One of the effects of the overcharged compressing unit is high suction pressure. It might seem like a mild issue that you might overlook and fail to call an AC repair Company for prompt repairs, but it’s not.

Your AC unit will experience flooded starts, and the liquid coolant might get in the suction line, posing a threat to your compressor. Therefore, you have to be proactive when you notice your AC is not operating efficiently and reach out to an AC repair Company for repairs or replacements as soon as possible.

Call Us Today!

High suction pressure is a diagnostic issue that shows your AC has restricted airflow, varying refrigerant charge, and condenser coils and fan problems. Other than guessing what the problem with your AC might be, call One Hour Air Conditioning & Heating of Dallas.

We are an air and heating company, serving clients in and around Dallas and Plano, TX, since 1988. Our business has licensed, insured, and certified technicians that can help you with all AC repairs, replacement, and maintenance as well as indoor air quality solutions. We also address an array of furnace issues that you might be facing, leaving you with comfortable indoor temperatures during winter. We are a phone call away.