Common Compressor Problems In Ac Units And How To Troubleshoot Them


The compressor, which is a pivotal part of your air conditioning system,  is designed to provide cool air by circulating the system’s refrigerant under pressure.  A faulty compressor may result in several issues including the system breakdown. Know what?  The units, which work hard, are more vulnerable to compressor failure. For example, in Largo, there is not much difference in the summer and winter temperatures, and so, ACs here run practically throughout the year. As a result, the units get exhausted quickly, and the chances of failure increase. Here are some common compressor issues and their troubleshooting options suggested by the AC repair experts in Largo. The knowledge will enable you take actions before it is too late.

Common Issues in AC Compressor

Overheating is one of the most common problems that may cause a compressor to malfunction.

The ratio between condensing and evaporating pressures is called the compression ratio, and the compressor tends to overheat when it becomes high. When the condensing pressure increases, the heat of compression also increases, damaging the compressor.

Hard Starting:
Hard starting is another common issue in AC compressor. When it occurs, the AC makes grinding or clicking noise while kicking off and soon after that, it shuts off again. The hard starting problem is mostly caused by faulty capacitors. The start capacitor enhances the compressor motor torque, and when it fails, the compressor does not start at all.

Frequent Cycling:
Frequent cycling is the situation when the compressor goes through rapid ‘on, and off’ cycles. This issue affects the system in several ways including high energy bill, reduced comfort level and excessive wear and tears. The frequent cycle issues occur due to electrical problems; even a worn or frayed wire can be a reason behind it.

Reduced Cooling Capacity:
The cooling capacity of a compressor may deteriorate either because of improper refrigerant charge or compressor pressurization problem. The unit will fail to maintain the optimal pressure if the suction pressure is too high or the discharge pressure is too low.

Locked Compressor:
An excessively worn down or poorly maintained compressor can be locked. Replacing the compressor can be the only solution to this problem. However, for too old ACs, it is a sign that the entire unit needs to be changed.

Troubleshooting Options

The capacitors are tested when the AC unit does not turn on. To troubleshoot the capacitor, technicians usually replace the faulty unit with a new one and test the system again.

Terminal Connections
A loose connection can cause several signal issues. Therefore, a technician checks whether everything is in place and tightly connected or not. Sometimes, dirt that accumulates on the wires is the main culprit. A cleaning work is enough to resolve the problem.

Some major problems in the compressor can occur due to a broken valve. When it happens, the refrigerant reaches the compressor inlet in liquid form instead of gas. This issue can be fixed by replacing the damaged valves.

Start Relays
Like capacitors, replacement is the only option for determining whether the start relay is faulty or not. If the compressor starts working after a change, your problem is resolved.

Shorted Windings
When the insulation on two windings of compressor dissolves, they touch each other and get shorted. Technicians measure the system with an Ohm Meter is to identify such issues. A zero reading, in this case, indicates that the compressor is faulty.

Compressor issues can lead to expensive repairs, if not fixed on time. Now that you know what the typical signs of a faulty compressor are, seek help from the AC repair experts in Largo as soon as possible. The sooner you address the issues, the better.