Identifying Potential Problems With Your AC Compressor

The compressor is arguably the most important part of your AC system. If something goes wrong, your air conditioner may literally grind to a halt. Mechanical issues cause a wide range of unusual noises as well as decreases in performance. The good news is that these problems are often related to secondary components, such as a bad capacitor. If you’re having trouble with your AC compressor, here are a few troubleshooting tips from our expert HVAC technicians in Buffalo Grove.

AC Compressor Starting Difficulties

If your air conditioner won’t start or if the compressor hums, the problem is likely caused by a faulty capacitor, relay switch or wiring connection. Defective components can also force your air conditioner to shut down before it cools your home.

Short Cycling or Continuous Operation

Low refrigerant levels and leaky valves can affect the compressor’s operation by causing pressure imbalances on the discharge or suction lines. Short cycling may also occur due to insufficient compressor oil or low-pressure conditions caused by worn bearings and piston rings.

Ice Buildup and Overheating

Have you noticed ice buildup on your condenser or evaporator coils recently? If so, your AC compressor may run continuously and overheat. These problems are usually related to low refrigerant, clogged air filters or dirty coils.

Seized Motors and Compressor Lock-Ups

Continuing to run an AC compressor that’s failing is a recipe for disaster. Faulty motor windings and defective mechanical parts can contaminate the compressor oil or cause the internal components to seize. If that’s the case, you may have to replace the compressor or install a new HVAC system.

Compressor troubles are related to a wide range of electrical and mechanical issues. For best results, have the system inspected by one of our expert HVAC technicians as soon as possible. Acting quickly helps to avoid inconvenient and potentially costly breakdowns. If you’d like to learn more, call Assurance Heating & Air Conditioning, or read about our AC repair services online.