A Complete Guide to AC Compressor Replacement Cost

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There are many factors to think about when planning an AC compressor replacement. The price to replace an air conditioner can vary widely depending on a number of factors, such as the manufacturer, model, warranty, size, refrigerant, and time of year.

Either the compressor or the entire system will need to be replaced. In some cases, it makes sense to replace just the compressor, but in others, getting a whole new air conditioner could be better.

Discover the most affordable home AC compressor replacement cost with the assistance of Cold Direct's team of HVAC professionals.

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How Does the Ac Compressor Work?

An air conditioner's compressor squeezes the coolant and pumps it through the system. Your air conditioner, heat pump, furnace, and air ducts are all components of your heating and cooling system, referred to as HVAC.

Over an evaporator coil, the refrigerant in your air conditioner removes heat from the air in your home. The refrigerant is transformed into a gas by the heated air and then delivered to the outdoor condenser coil, which is transformed back into a liquid. The AC compressor between the evaporator and condenser coils pumps refrigerant.

An air conditioner's compressor acts as its circulatory system, with refrigerant serving as its lifeblood. To cool your home, it circulates refrigerant through the HVAC system.

How Does the Ac Compressor Work

What are the problems with AC compressors?

If the compressor in your air conditioner stops working, your complete AC unit will stop functioning, and you will need to perform AC troubleshooting. The high voltage present in an HVC compressor makes it extremely dangerous if handled incorrectly.

Therefore, only a certified HVAC air conditioning repair specialist should evaluate and repair a malfunctioning compressor, but some signs of a bad ac compressor bearing might help you decide whether to make that call.

Unchanging temperatures in your home

If the temperature in your home doesn't change, but the air conditioner is on, the compressor may be broken. If the hot air isn't being expelled from the unit, the compressor isn't doing its job, and your home won't cool down.

Strange noises coming from your AC

If your air conditioner is making strange noises, check that the fan and compressor are running smoothly and that only a tiny hum emanates from the device. If your air conditioner is making strange noises like banging, hissing, clattering, or screeching, you may need to have it serviced by a professional.

Leaks around your unit

If you go outside and see a leak around your air conditioner, stay away from it. A refrigerant leak indicates that the air conditioner's compressor or another component in the cooling cycle is not functioning as it should. Refrigerant is a toxic substance that needs to be handled by a trained HVAC technician.

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What are the main factors of home ac compressor replacement cost?

When deciding whether to repair the air conditioner by fixing the compressor or purchasing a new unit, remember a few things.

Style of Compressor

One can choose from single-stage, two-stage, or variable-speed compressors. Replacement fees for two-stage and variable-speed designs are higher than those for standard designs.


Many different manufacturers offer excellent products at a variety of price points. Compressors from the same manufacturer are recommended for central air conditioners.


It is necessary to refill the refrigerant after the compressor has been replaced. For a newer unit using R410A Freon, the cost to replace the refrigerant is between £80 and £260, but for an older unit using R22 Freon, the cost can range from £140 to £470 or more.

Service Contracts

A central air conditioner consists mostly of a compressor. The warranty normally covers most of the expense of fixing the compressor. It may be more convenient and cost-effective to purchase a new air conditioner if the compressor is out of warranty.

What Does an AC Compressor Replacement Cost?

The price to replace a compressor in an air conditioner varies widely based on factors such as the size of the home, the AC brand, types of air conditioning, and the amount of work required to replace the old compressor. A/C compressor replacement is time-consuming; therefore, you should budget for rather high labor charges.

The primary expenses for a new AC compressor installation are detailed below.

home ac compressor replacement cost

Cost by Home Size

AC sizes are measured in Pounds, which indicate how much energy an AC needs to remove heat from your home. Home cooling requires more BTUs for larger dwellings. An AC pump replacement in a larger unit is usually more expensive.

A typical home requires between £1,500 to £3,500, or around £16 to £35 per square foot. Find below the suggested BTUs for an HVAC system, based on the square footage of your property.

Cost by HVAC System

The sort of HVAC system you have will determine the type of compressor you need. As a result, compressor costs may rise or fall. It's important to remember that buying a new air conditioner is usually more cost-effective than replacing the compressor in a smaller system, like a window unit.

Type of HVAC System Compressor Cost

  • Window AC: £150 and £400
  • Central AC : £600 and £2,100
  • Heat pump : £600 and £2,400
  • Mini-split AC : £600 and £2,400

Cost by Compressor Type

No HVAC unit has the same capacity, efficiency, or operating range. Thus, AC compressors operate differently. Other options include upgrading your AC compressor, which may cost more.

This compressor runs at full speed and never slows down. Prices range from £250 to £1,200.

A variable-speed AC compressor runs longer, cools slower, and runs at varied speeds. Its slow cooling helps dehumidify your home and costs £1200 to £2000.

Cost by Brand

Brands of air conditioners can have drastically different costs. Sticking with the same manufacturer as your air conditioner or furnace is best. Depending on your chosen brand, you may easily spend an extra £1,200 to £2,200.


The cost of AC pump replacement can vary depending on several factors, such as the type of system (home or commercial), the make and model of the compressor, the location, and market conditions. When selecting a service provider, consider warranties, reputation, and expertise. Properly maintaining and servicing your AC system can help prolong the compressor's life and reduce the likelihood of costly replacements in the future.

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