I really appreciate how honest and efficient this company is. They identified the problem quickly and fixed it without unnecessary charges. I would definitely recommend them!
M
Matthew Lim
Aircon Gas Leak Detection and Repair in Singapore
A gas leak means the refrigerant circuit has a hole somewhere — a loose flare, a cracked braze, a corroded coil, or a failed valve core. We pressure-test the circuit with nitrogen, pinpoint the exact leak, repair it, and recharge the system properly. Topping up without fixing the leak just resets the clock.
How we approach gas leak repair
Test before topping up
We do not add gas to a system that is leaking. The leak is found and repaired first. Topping up a leaking system wastes money and delays the real fix.
Nitrogen test, not guesswork
A proper nitrogen pressure test gives a definitive result. We hold pressure at the correct level for the correct duration — not a quick visual check.
We tell you when replacement makes more sense
If the leak is inside a coil or the repair cost approaches a new unit, we tell you. No point repairing what should be replaced.
Signs of a gas leak
These symptoms suggest refrigerant loss. The leak could be at a joint, valve, pipe run, or inside a coil.
- Unit was topped up recently but cooling has dropped again
- Ice forming on the copper pipes or evaporator coil
- Unit blows air but it is not cold enough
- Hissing sound from the indoor or outdoor unit
- Outdoor unit pressure readings below normal range
- Previous company topped up gas multiple times without fixing the cause
How gas leak detection and repair works
The leak must be found and confirmed before any gas is added. Topping up a leaking system wastes money and delays the permanent fix.
1. Recover existing refrigerant
Any remaining refrigerant is recovered from the system before testing. This gives an accurate baseline for the pressure test.
2. Nitrogen pressure test
The circuit is pressurised with dry nitrogen to the correct test pressure. We hold the pressure and monitor the gauge — a pressure drop confirms a leak exists.
3. Pinpoint the leak location
We use electronic leak detectors and soap solution to find the exact point — flare joints, braze points, service valves, pipe runs, or coil surfaces.
4. Repair and retest
The repair depends on the location — reflaring a joint, rebrazing a pipe, replacing a valve core, or cutting out a damaged pipe section. After repair, the circuit is pressurised again to confirm the fix holds.
5. Vacuum and recharge
The system is vacuumed to remove moisture and air, then recharged with the correct refrigerant type and quantity. A test run confirms cooling is restored.
Pricing
Cost covers the pressure test, leak detection, repair, and gas recharge. Simple joint repairs cost less than coil-level work or pipe replacement.
- Pressure test fee covers nitrogen, equipment, and leak pinpointing
- Repair is quoted separately after the leak is found and assessed
- Gas recharge cost depends on refrigerant type and quantity
- No repair work starts until you agree to the full quote
Booking and visit timing
Pressure testing and simple repairs are often completed in a single visit. Complex repairs involving pipe work or coil access may need a follow-up.
- Testing visit typically takes one to two hours
- Flare or valve core repairs can often be done on the same visit
- Pipe section replacement or coil-level leaks may need a follow-up
- We confirm timing once we know the leak location
What the pressure test covers
A nitrogen pressure test checks the entire refrigerant circuit — indoor coil, outdoor coil, pipe runs, joints, and valves.
- Full circuit pressurisation with dry nitrogen
- Gauge monitoring over the test period to detect pressure drop
- Electronic leak detection at joints, valves, and braze points
- Soap test at suspected leak points for visual confirmation
- Clear report on leak location and recommended repair path
Common leak locations
Most refrigerant leaks in residential systems occur at a small number of predictable points.
- Flare connections at indoor and outdoor unit joints
- Braze points where copper pipes are joined
- Service valve cores on the outdoor unit
- Evaporator coil — especially on older units with corrosion
- Pipe runs through walls where vibration or movement causes wear
- Condenser coil — salt air corrosion in coastal areas
When leak repair is not the right call
Some leaks are not worth repairing — especially when the leak is inside a coil or the unit is near end of life.
- Leak inside the evaporator or condenser coil — coil or unit replacement is usually more practical
- Multiple leaks found across the circuit — full pipe replacement may be needed
- Unit is older than ten years with corroded coils — replacement may make more sense
- Repair cost approaches the price of a new system — we give you both numbers
What customers say
Highly professional and efficient service! The technicians arrived on time, performed a thorough cleaning, and fixed my aircon issue. Honest pricing, no hidden charges.
I
Irwan Abu Samah
Initially engaged another company to look into the issue with our aircon but was quoted a much higher price. Snowflake clearly explained the issue and what needs to be done, and recommended possible solutions based on their expertise.
R
Rafidah B
Snowflake clearly explained the cause of the issue and what needs to be done, recommended possible solutions based on what is best for the customer.
S
SaifudinDxdin
Gas leak detection & repair FAQ
Related reading
Gas keeps running out?
Describe the symptoms and any previous top-ups. We will confirm whether leak detection and repair is the right next step.
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