AC service · Aerosure
AC service guides for technicians: cooling, cleaning, leaks and coil protection
Practical guides for AC and HVAC technicians in India. Diagnose low cooling, clean coils with foam in one visit, find leaks before you recharge gas, protect coils from corrosion and remove odours. Each guide has the steps, the tools and the Aerosure product for the job, plus a printable service checklist.
- Room ACs sold in India
- 12 to 12.5 million in FY2025 (ICRA)
- Technicians to train
- 1 lakh, India Cooling Action Plan
- Guides
- 9 technician guides
- Checklist
- Printable PDF
- DPIIT recognised · DIPP258886
- ISO 9001:2015
- GMP (IAF)
- Own aerosol filling line
- MSDS on request · CoA with every batch
Problems first
Find the fix for the job in front of you
Why is my split AC not cooling? A technician’s checklist
Most split ACs that do not cool have a dirty filter, a fouled indoor coil, a blocked outdoor condenser, low refrigerant…
AC not coolingCoil cleaning SOPHow to clean a split AC coil with foam: 4-step SOP
Switch off and isolate the power, open the panel and wear gloves and eye protection. Brush or vacuum loose dust along…
Foam cleaning SOPOutdoor unitHow to clean an AC condenser coil (outdoor unit)
A dirty outdoor condenser cannot reject heat, so the compressor works harder and the room cools slower. Isolate power…
Condenser coil cleaningLeaksHow to find an AC gas leak before recharging
If an AC keeps losing gas, find the leak before you recharge it. With the system pressurised, spray Aerosure AC Leak…
Leak detectionCorrosionFormicary corrosion in AC coils: causes, signs and prevention
Formicary or ant-nest corrosion is a network of microscopic tunnels in copper tubing that can cause pinhole leaks…
Formicary corrosionProtectionAC coil coating: when and how to protect coils from corrosion
Coat AC coils in coastal, industrial or highly polluted sites, where salt and acidic air corrode fins and copper. Clean…
Coil coatingOdourHow to remove a bad smell from a split AC
A musty or sour smell from a split AC usually comes from dirt and microbial growth on the wet indoor coil, the drain…
AC smell removalMethodsFoam cleaning vs jet pump: which is better for split AC coils?
A jet pump wash pushes water through the coil and can clean heavy dirt, but it needs water, a bag or sheet, more time…
Foam vs jet pumpChecklistAC service checklist for technicians (printable)
Customers pay for results they can see. Use this checklist on every split AC service: note the grille temperature…
Service checklistWhich product do I need?
Problem, product, guide
| Problem | Aerosure product | Guide |
|---|---|---|
| AC not cooling | Aerosure AC Foam Cleaner | AC not cooling |
| Dirty indoor coil | Aerosure AC Foam Cleaner | Foam cleaning SOP |
| Dirty outdoor condenser | Aerosure AC Coil Shining Concentrate | Condenser coil cleaning |
| Gas leak before recharge | Aerosure AC Leak Detector | Leak detection |
| Coastal or polluted site | Aerosure Coil Saver Coil Protector | Coil coating |
| Bad smell from the AC | Aerosure AC Foam Cleaner | AC smell removal |
| Car AC smell | Aerosure Car AC Vent Foam | AC smell removal |
The Aerosure range
- Aerosure AC Foam CleanerExpanding foam AC coil cleaner
- Aerosure AC Leak DetectorBubble leak detection spray
- Aerosure Coil Saver Coil ProtectorAC coil protective coating spray
- Aerosure AC Coil Shining ConcentrateDilutable outdoor coil cleaner concentrate
- Aerosure Clear Coat SprayClear protective lacquer spray
- Aerosure Car AC Vent FoamCar AC vent and duct cleaning foam
Questions people ask us
Why is my split AC not cooling after service?
The usual causes are a dirty filter or coil, a blocked outdoor condenser, low gas from a leak, or an electrical fault. Check them in that order. Our AC not cooling checklist walks through each one.
What is the best way to clean a split AC coil?
Isolate power, brush off loose dust along the fins, then apply a coil foam cleaner such as Aerosure AC Foam Cleaner and rinse gently or drain as the label says. A pressure washer can bend fins.
How do I find an AC gas leak before recharging?
Pressurise the system and spray a bubble leak detector such as Aerosure AC Leak Detector on flare nuts, brazed joints, valves and U-bends. Fix the leak before you recharge.
Do you supply technicians directly?
Yes. Technicians and AMC companies get trade pricing on Aerosure cases. Register on the trade pricing page.
Trade pricing for technicians and service companies
Register once. We reply with case prices within one working day.
AC maintenance numbers to know
| What | Typical range |
|---|---|
| Clean or replace filters | Every 1 to 2 months in the cooling season, sooner in dust [source] |
| Energy saved by a clean filter | 5% to 15% less energy than with a clogged filter [source] |
| Check the indoor (evaporator) coil | Every 12 months; clean when dirty [source] |
| Drain line | Clear it at each service so water cannot back up [source] |
| Star label | Compare models by BEE star rating and ISEER [source] |