Is Your Aircond Low on Gas?
Not Cold Enough
Room takes forever to cool down or never reaches the set temperature even on the coldest setting.
Ice Forming on Pipes
Ice or frost forming on the copper refrigerant pipes or the indoor unit coil — a clear sign of low gas pressure.
Keeps Needing Top-Up
If you top up gas and it runs out again within months, there is a leak — topping up without fixing it is wasted money.
Compressor Running Non-Stop
Low refrigerant makes the compressor work harder to compensate — it runs constantly and drives up your electricity bill.
Error Codes on Display
Many units (Daikin, Mitsubishi, etc.) will show a specific error code when refrigerant pressure drops below normal.
Hissing Sound
A faint hissing or bubbling sound near the unit, especially when the compressor is running, often indicates a leak point.
Our Equipment & Method
We use two methods depending on the situation — infrared detector scan first, followed by a pressure test if no leak is visually found.
Detector
Step-by-Step Process
Check Gas Pressure & Inspect System
Connect manifold gauges to measure current refrigerant pressure. Inspect the system for visible signs of oil staining, frost, or corrosion — common indicators of the leak location.
接上压力表检查当前冷媒压力，并检查系统是否有油渍、结冰或腐蚀等明显泄漏迹象。
Infrared Gas Leak Detector Scan
Sweep the infrared electronic leak detector along all pipe joints, indoor unit connection points, flare fittings, and the outdoor condenser valve stems to detect refrigerant gas escaping from any point in the system.
使用红外线电子检漏仪扫描所有管道接头、室内机连接点、喇叭口及室外机阀门，检测系统任何泄漏点。
Leak Found — Repair & Recharge
If the leak point is found, we repair or re-flare the fitting, re-vacuum the system, and recharge with the correct refrigerant (R32 or R410A) to manufacturer-specified pressure.
找到泄漏点后，修复或重新扩喇叭口，对系统抽真空，再充注正确型号的冷媒（R32或R410A）至规定压力。
If Leak Not Found — Proceed to Pressure Test
If the infrared scan finds no visible leak, we proceed to a full nitrogen pressure test. The system is evacuated and charged with dry nitrogen gas to 650 PSI.
若红外线扫描未发现泄漏，进行氮气压力测试 — 抽真空后充入干燥氮气至650 PSI。
650 PSI Pressure Hold — 1 Week
Both indoor cooling coil and outdoor condenser are tested simultaneously at 650 PSI. Pressure gauges are left on and checked after 1 full week — any pressure drop confirms a leak.
室内冷却盘管及室外冷凝器同时在650 PSI下进行测试，保压1整周后检查压力表 — 压力下降即确认有泄漏。
Results & Next Steps
If pressure holds — system is confirmed sealed, we recharge refrigerant and you're done. If pressure drops — leak is confirmed and we identify the section (coil or condenser) for repair or replacement.
保压合格 — 系统密封确认，充注冷媒，完工。保压失败 — 确认泄漏，进一步确定泄漏部位（盘管或冷凝器）进行维修或更换。
Scope of Service
| Item | Details | Status |
|---|---|---|
| Infrared gas leak scan | Electronic infrared detector scan of all pipe joints, valves, and fittings | ✓ Included |
| Pressure test — indoor cooling coil | 650 PSI nitrogen hold test for 1 week | ✓ Included |
| Pressure test — outdoor condenser | 650 PSI nitrogen hold test for 1 week | ✓ Included |
| Manifold gauge reading | Current refrigerant pressure check on arrival | ✓ Included |
| Refrigerant top-up (R32 / R410A) | After leak is confirmed repaired and system re-vacuumed | Quoted separately |
| Leak repair (re-flaring / pipe replacement) | Depends on leak location and severity | Quoted separately |
| Cooling coil replacement | If coil is found to be cracked or corroded beyond repair | Quoted separately |
Before You Book
Q.Why 650 PSI? My unit runs at much lower pressure.
650 PSI is a standard high-pressure nitrogen test — it's much higher than normal operating pressure (R32 runs at ~170 PSI, R410A at ~200 PSI) so any micro-leak that might not show under normal conditions will reveal itself. This is the industry-standard way to confirm system integrity.
Q.Why does the test take 1 week?
A very small leak will only cause a measurable pressure drop over time. Checking after 1 week gives a definitive result — a same-day check can miss slow leaks that would cause problems within months.
Q.Can I still use my aircond during the pressure test?
No — the refrigerant is evacuated and the system is filled with nitrogen during the test period. You will not be able to use the unit for approximately 1 week while the test is running.
Q.What happens if the leak is in the cooling coil?
Cooling coil leaks are usually caused by formicary corrosion (from formic acid in the air reacting with copper). In most cases the coil needs to be replaced — we will advise and quote on this after the test confirms the location.
Q.Do you service all brands?
Yes — Daikin, Mitsubishi, Panasonic, Samsung, LG, Midea, Acson, York, Carrier, Haier, Gree, and more. The gas leak detection and pressure test process is brand-independent.
Suspect a Gas Leak?
Don't keep topping up gas without finding the cause.
Contact us for a proper leak check and pressure test.