7 Signs of a Bad Air Conditioner Compressor - Guide for Port St. Lucie Homeowners
The compressor is arguably the single most important part of your air conditioner and plays the critical role of compressing and moving refrigerant fluid through your system. That also means the compressor is one of the most common parts of your air conditioner to malfunction. With that in mind, the team at Bates Air & Heat is here with this quick guide on the most common signs of a broken air conditioner compressor. Keep an eye out for these compressor malfunction symptoms to stay on top of your system.
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What Does the Compressor Do?
The compressor, as the name implies, functions by compressing refrigerant fluid in the coolant lines. The pressurized refrigerant flows into the evaporator coils, where it extracts heat from the ambient atmosphere. The heated coolant fluid then goes through the condenser coils, which expels the heat and compresses the fluid back into a liquid.
The compressor controls the physical state of coolant fluid, so it is one of the most important components of your system. All AC compressors work by compressing air, but there are three main types of compressors.
- Screw compressors have two screws that rotate against each other, capturing and compressing air.
- Reciprocating compressors have a small piston that rapidly moves back and forth to compress air.
- Rotary compressors have a series of internal blades that rotate and move air up the cylinder while pressurizing it.
1. No Cold Air
The compressor is the reason why your air conditioner can produce cold air in the first place. Without a compressor, the refrigerant fluid won't be pressurized enough to extract heat out of the air your air exchange takes in. Hold your hand up to your air vents and turn the air conditioning down. If the air doesn’t get colder, then you may have a compressor issue on your hand. A broken compressor can also cause inconsistent temperature control.
2. AC Is Over cycling
Your air compressor is also the main unit that controls when your air conditioner cycles between on and off. When the temperature is too high, the compressor kicks on to initiate a cooling cycle. The typical residential air conditioner should cycle about two to three times per hour. If it cycles more than three times an hour, it could be because of a malfunctioning compressor problem. The compressor isn’t responding to the thermostat correctly, so it causes the AC to cycle even when the temperature is correct.
3. Strange Noises from Compressor
Most air conditioner compressors have a rotating blade or screw that compresses air. When the compressor sustains physical damage, the blades or screws start to scrape against one another. If you hear clicking and strange noises from the compressor, it's probably broken and will need a replacement.
4. Circuit Breaker Trips
If your circuit breaker trips every time you turn your air conditioner on, then it may be a problem with your compressor. A bad compressor capacitor could be drawing more electricity than necessary, which can cause the circuit to shut down every time it turns on. To fix the problem, you’ll either need to replace the broken capacitor or replace the entire compressor.
5. High Cooling Bills
Malfunctioning compressors take more energy to run and your air conditioner has to make up the slack by working harder. The result is your energy bills can start to creep up higher and higher while AC provides inefficient cooling performance. Your power bills can take a noticeable jump, especially during periods of high air conditioner usage.
6. AC Won’t Turn On
Another one of the common signs of a bad air conditioner compressor is if your AC won’t turn on at all. The compressor tells the air conditioner when to turn on, so a broken compressor can mean your AC won’t turn on.
7. Refrigerant Leaks
If the compressor casing breaks, it can start to leak coolant fluid underneath your unit. Coolant fluid is colorless and odorless, but most manufacturers add dyes and artificial scents so you can detect leaks when they occur.
How Much Does It Cost to Replace a Bad Air Compressor?
AC compressors are one of the most expensive air conditioner components to replace. You can expect to spend an average of $1,500 for a replacement compressor, with a typical range between $800 and $2,200. Parts cost about 50% of the price, while the other 50% is variable labor costs.
Protecting Your Air Conditioner Compressor
The best way to avoid these common signs of a bad air conditioner compressor is vigilant prevention. Following these tips can help optimize air conditioning performance and reduce the risk of developing AC compressor failure indicators and compressor overheating issues.
- Check for leaking refrigerant once every few weeks. Your air conditioner should not normally run out of refrigerant, so if you are running low, there is a leak somewhere in the system.
- Clean your evaporator and condenser coils once every six months. Dirty coils cause your compressor to work harder and wear out faster.
- Keep the refrigerant suction line clear of obstructions. Blockages can cause refrigerant pressure and temperature to increase.
- If your breaker keeps tripping, locate the circuit breaker and check to make sure it’s not damaged. If it is, you can replace the damaged breaker and see if that fixes the problems.
- Clean your outdoor AC unit from grass clippings and vegetation. These can clog your outdoor unit and cause the compressor to overheat.
- Get regular air conditioner maintenance. Routine maintenance appointments can identify compressor issues before they cause a serious problem.
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