Inherited aircons are a common feature of HDB resale deals. Sellers frequently include existing units as part of the sale, framing them as a convenience that saves the buyer upfront installation costs.
On the surface, accepting a working 2nd hand aircon system seems like a reasonable trade-off. However, in practice, a used aircon of unknown age and maintenance history can quickly become one of the more expensive items in a resale flat purchase.
Critical Questions to Ask Before Keeping a Used Aircon
Before accepting any existing units, ask the seller for clear answers to each of the following.
- Age of the system: Aircons in Singapore typically last 8 to 12 years, so any unit over 7 years old is likely to require significant repairs in the near term. Check the installation date on the outdoor unit label or ask for the original purchase receipt.
- Maintenance history: Without regular servicing, internal damage from clogged coils, refrigerant leaks, and compressor wear builds up invisibly. If the seller cannot produce servicing records, that maintenance likely did not happen.
- Warranty status: Manufacturer warranties generally do not transfer to new owners and are void without proof of purchase. As such, keep in mind that without valid coverage, all repair costs will fall to you from day one.
- Energy efficiency rating: Older 2-tick or 3-tick systems can cost $30 to $50 more per month to run than a current 5-tick unit, eroding any upfront savings from accepting a 2nd hand aircon within 12 to 24 months.
Hidden Costs & Risks of Keeping Old Aircon Systems
Even a unit that appears functional at viewing can present high costs once you move in. Common issues with older resale flat aircons include:
- Imminent repair expenses: Ageing compressors, refrigerant leaks, and failing fan motors are all common in older units. For instance, compressor replacement can cost $800 to $1,500, and multiple repairs within the first year can quickly exceed the cost of a new aircon installation. If you suspect underlying issues, an aircon diagnostic service in Singapore can give you a clearer picture of what you are inheriting before committing.
- Incompatible refrigerant: Older systems may use R22 refrigerant, which is being phased out in Singapore. If the unit needs a gas top-up, R22 is increasingly difficult to source and costly, and you may be forced into a full replacement regardless.
- No recourse after handover: Once the sale completes, the seller has no obligation to address faulty aircons. Any issues that surface during renovation, when you cannot properly test the units, will become your responsibility entirely.
- Higher ongoing electricity bills: An old 3-tick system can consume 30 to 40% more electricity than a new 5-tick inverter unit. That difference adds up considerably across years of daily use.
- Improper installation issues: Previous installations may not meet current BCA standards. For example, poorly sloped drain pipes, inadequate insulation, or unsecured brackets can cause water leaks or structural issues that fall to you to fix.
When It Makes Sense to Keep vs Replace
Consider keeping the existing aircon if:
- The unit is under 3 years old with documented regular servicing
- The seller provides original receipts and evidence of warranty status
- A recent professional inspection confirms good working condition
- The energy efficiency rating is 4 ticks or above
Consider replacing with a new aircon if:
- The units are 5 or more years old with no maintenance records available
- Performance issues, such as weak cooling, unusual sounds, or water leaks, are apparent during viewing
- The system uses R22 refrigerant
- The energy rating is below 4 ticks, or the rating is unknown
When negotiating, factor aircon replacement costs ($3,000 to $5,000 for a full system) into your offer price. If you are keeping the existing units, request that the seller arrange a professional service before handover as a condition of the agreement.
Meanwhile, if you’re replacing the unit, use the replacement cost as grounds for a cash-over-valuation reduction or renovation cost offset.
As a new resale flat owner, you may also be eligible for the $400 Climate Voucher if you have not previously claimed it, making the switch to a new 5-tick system more affordable than the upfront figure suggests.
Make the Right Decision with 81 Aircon's Professional Assessment
Accepting 2nd hand aircons without an assessment is one of the more avoidable risks in a resale flat purchase. Fortunately, you do not have to make that call on your own.
The 81 Aircon team works with resale flat buyers on both fronts, handling aircon repairs for salvageable units and full aircon installation for buyers replacing existing systems.
In either case, all work is BCA-certified, backed by proper warranty, and eligible for Climate Voucher redemption where applicable.
Buying a resale flat? Contact 81 Aircon for a professional inspection, honest assessment, and servicing or installation tailored to your situation.
