Is Replacing Only The Outside Aircon Unit: A Good Idea Or A Mistake?

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If you had your AC units professionally evaluated, you might have been advised to replace them. You may be wondering if changing the exterior unit is sufficient. The straightforward answer is no.

Professional aircon installation specialists will tell you that when you replace the outdoor AC unit in your house, you must also replace the inside equivalent so that both perform at maximum capacity. Replacing one can lead to decreased efficiency and frequent failures, costing more money in repairs or replacements over time!

When the hot season arrives, you turn on your aircon to remain cool in the hot heat. This year, though, is different. Your outdoor aircon has outlived its useful life, and things used to be more relaxed than they were. You’re now faced with a decision: should you replace the outside unit or both aircon units? We’ll assist you in making your decision.

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Can We Replace Only AC Unit Outside?


If your unit is under five years old, it may still be covered by the manufacturer’s guarantee. In that instance, you should be able to replace only the outdoor air conditioning unit. Unfortunately, replacing the interior and outdoor units is usually a preferable option in most other circumstances. This is why.

Yes, only the outside aircon unit, the condenser, or the external unit may be replaced. If the inside unit or air handler is still in excellent condition and compatible with the new outdoor unit, it may not need to be replaced.

In the following cases, replacing the exterior aircon unit may be a realistic option:

a) Failure of equipment: 

If the outside unit has suffered a substantial failure or is damaged beyond repair, it may be required to replace it.

b) Upgrading Efficiency: 

If your present outdoor unit is old and inefficient, upgrading it with a modern one can increase energy efficiency and cheaper operating expenses.

c) compatibility issues: 

If you are updating your cooling system or changing the refrigerant type, you may need to replace the outside unit to guarantee compatibility with the new equipment.

While replacing merely the exterior aircon unit may appear to be a cost-effective solution, it is not necessarily recommended: To avoid these, the aircon installation must be done   accurately. 

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5 Reasons Why You Should Not Replace Your Outside Unit

1. Incompatible elements: 

Aircon unit systems are constructed as linked, with the inside and outdoor units cooperating to provide adequate cooling and efficiency. If the new unit is not correctly matched with the current indoor unit, it may cause compatibility difficulties and lower performance. Mismatched components can lead to decreased efficiency, higher energy consumption, and system failure.

2. Ineffective operation: 

If the present inside unit is old or inefficient, just replacing the exterior unit will not solve the problem. The indoor unit considerably impacts the system’s overall efficiency and performance. An old or inefficient interior unit may be unable to fully use the potential of a newer, more efficient outside unit, resulting in inadequate cooling and energy efficiency.

3. Concerns about warranties: 

To preserve warranty coverage, air conditioner manufacturers frequently demand that the complete system, comprising the inside and outdoor units, be replaced. You risk voiding the warranty on the new unit and any other system components by merely replacing the exterior unit. You must make sure that aircon installation has to to be done in the right way. 

4. Repair expenses have risen: 

If the indoor unit is old or near its useful life, it may need to be repaired or replaced shortly. You may incur further repair charges for the inside unit in the near future if you merely replace the exterior unit.

5. Benefits are limited: 

While replacing the exterior unit may result in some energy savings, it may only partially optimise the system’s performance. Replacing the interior and outdoor units simultaneously allows for a thorough update and guarantees that all components work together for optimal efficiency and performance.

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Replacing your air conditioning system’s interior and exterior components simultaneously is preferable. If you can only afford to repair one unit, make it the outside unit. This is because the outdoor unit works harder than the inside and wears out faster. 

It is best to consult with a qualified aircon professional from EconCool who can assess your specific situation, take into account the age and condition of your entire system, and make recommendations on whether replacing just the outside unit or replacing the whole system is the best and most cost-effective option for your needs.

Take your time with an aircon gas leak. Our trained and qualified experts are available to assist you. We specialize in aircon gas leak repair, ensuring your air conditioning system performs optimally and safely.

Don’t allow an aircon gas leak to risk your comfort and energy bills. Our swift and dependable service will promptly locate the cause of the leak and conduct effective repairs to restore the operation of your air conditioner. Trust our knowledge and enjoy cold, pleasant air once more.

Contact us to schedule an appointment for aircon gas leak repair in Singapore. Our helpful customer service representatives are standing by to answer any questions or problems you may have.