Buying the right AC is only half the job — a poor installation or neglected servicing can ruin even a premium unit's cooling and shorten its life. This practical guide explains what a proper AC installation includes, how to service your unit, what it roughly costs, and the common mistakes to avoid in Pakistan.
Why installation makes or breaks your AC
A badly installed AC is the most common reason a brand-new unit cools weakly. Wrong pipe length, low gas, poor vacuuming, or a badly placed outdoor unit all sabotage performance and efficiency from day one — and can void your warranty. Getting installation right is just as important as choosing the right model and ton size.
What a proper installation includes
- Correct copper pipe length — kept as short and direct as practical; quality piping, not the cheapest.
- Vacuum / pressure test before releasing gas, to remove air and moisture and confirm no leaks.
- Firmly mounted outdoor unit in a shaded, well-ventilated spot with clearance around it.
- Level indoor unit mounted high on the wall with a proper drain slope so water drains outside.
- Secure electrical connection, ideally on a dedicated circuit, with a stabiliser if voltage fluctuates.
- A cooling test on Cool mode before the technician leaves.
Insist on these regardless of brand — a good seller arranges proper installation and honours the warranty.
Where to place the indoor and outdoor units
Mount the indoor unit high on a wall, away from direct sunlight, with clear space so air circulates across the whole room rather than blowing into a wall or curtain. Put the outdoor unit in a shaded, ventilated spot with at least a foot of clearance; never box it into a tight, hot corner, as trapped heat makes it work harder and cool less. Keep the pipe run between them short.
How often should you service your AC?
The golden rule is a full professional service once before each summer, plus filter cleaning every 2–3 weeks during heavy use. A pre-summer service typically includes deep-cleaning the filters and coils, checking gas pressure, clearing the drain, and inspecting electrical connections. This keeps cooling strong, lowers the bill, and catches small problems before they become breakdowns in peak heat.
What you can do yourself
- Wash the indoor filters every few weeks (remove, rinse, dry, refit).
- Gently rinse the outdoor unit's fins and clear leaves and dust around it.
- Keep the area around both units clear for airflow.
- Check the drain pipe runs water freely.
Leave anything involving gas, electrical components or opening the sealed system to a professional. For diagnosing weak cooling, see our AC not cooling guide.
Rough costs in Pakistan
Exact charges vary by city and technician, but as a guide: a standard installation is often included or low-cost when you buy from a good retailer (extra piping beyond the standard length costs more); a pre-summer service/clean is the cheapest recurring job; a gas refill (with leak repair) costs more; and major repairs like a PCB or compressor are the most expensive. Budget for installation and a stabiliser when buying, and for one service each year.
Common installation and servicing mistakes
- Skipping the vacuum/pressure test — leaves air and moisture in the system, hurting cooling and life.
- Over-long or kinked pipe runs — reduce efficiency.
- Boxing in the outdoor unit — trapped heat kills performance.
- No stabiliser on fluctuating voltage — risks the compressor.
- Never servicing — dirty filters and coils quietly raise the bill and lead to breakdowns.
Protect your warranty
Buy from an authorised seller, keep your invoice and warranty card, and use qualified technicians for installation and gas work — unofficial handling can void the manufacturer warranty, especially on the compressor (often covered up to 10 years on inverter models). The warranty is only as good as the paperwork and the people who touch your unit.
The bottom line
A great AC needs a great installation and regular servicing to deliver its full cooling and efficiency. Insist on a proper install (correct piping, vacuum test, well-placed outdoor unit, cooling test), clean the filters every few weeks, and book one professional service before each summer. Do that, and your AC will cool strongly, run efficiently and last for years. Browse efficient models on the air conditioner price page.
Your pre-summer AC checklist
Run through this in March–April, before the heat hits and technicians get busy:
- Wash both indoor filters and check they're undamaged.
- Rinse the outdoor unit and clear anything blocking airflow around it.
- Power on and confirm it cools quickly on Cool mode at 24°C.
- Listen for unusual noises and check the drain runs water freely.
- Book a professional service if it wasn't done last year or cooling felt weak.
- Confirm your stabiliser works if your area has voltage swings.
How to choose a good technician
The best AC underperforms with a careless installer or service. Choose someone who uses quality copper piping, performs the vacuum/pressure test (don't let them skip it), places the outdoor unit properly, and tests cooling before leaving. Ask whether installation is included when you buy, and prefer the seller's authorised technicians so your warranty stays valid. A good install costs a little more but saves you cooling problems and repair bills for years.
Step-by-step: a basic DIY clean
- 1. Switch the AC off at the wall.
- 2. Open the indoor unit and slide out the mesh filters.
- 3. Rinse the filters under water, dry fully, refit.
- 4. Outside, gently rinse the outdoor fins (don't bend them) and clear debris.
- 5. Power on and test on Cool mode.
Leave gas, electrical and sealed-system work to a professional.
Repair or replace an old AC?
If your AC is under about seven years old and the fault is a one-off, repair it. If it's older, breaks down repeatedly, or needs a major fix like a compressor, replacement usually wins — a new inverter unit cools better and cuts the bill 30–50%, often paying back faster than you'd expect. Our AC not cooling guide helps diagnose whether it's a quick fix first.
Servicing schedule at a glance
| How often | Task |
|---|---|
| Every 2–3 weeks (summer) | Wash the indoor filters |
| Monthly | Rinse the outdoor unit, clear clutter around it |
| Before each summer | Full professional service + gas/pressure check |
Sticking to this keeps cooling strong, the bill lower, and the compressor healthy for years.
The bottom line
A great AC needs a great installation and regular servicing to deliver its full cooling and efficiency. Insist on a proper install — correct copper piping, a vacuum/pressure test, a well-placed outdoor unit, a level indoor unit with proper drainage, and a cooling test before the technician leaves. Then clean the filters every few weeks and book one professional service before each summer. Do that, and even a mid-range inverter will cool strongly, run efficiently and last for years — while a premium AC installed badly will disappoint from day one.
Frequently asked questions
Why is my new AC not cooling well? Most often a poor installation — wrong pipe length, low gas, or a badly placed outdoor unit.
How often should I service my AC? A full service once before each summer, plus filter cleaning every 2–3 weeks during heavy use.
What does a proper AC installation include? Correct piping, a vacuum/pressure test, a well-placed outdoor unit, a level indoor unit with proper drainage, and a cooling test.
Can I clean my AC myself? Yes — filters and the outdoor unit; leave gas and electrical work to a professional.
Does a bad installation void the warranty? Unofficial installation or gas work can void it — use authorised, qualified technicians.
Do I need a stabiliser? Unless your AC has wide-voltage protection, yes — it protects the compressor where voltage fluctuates.
How long does AC installation take? A standard split-AC installation usually takes 1–2 hours when done properly.
What is a vacuum/pressure test and why does it matter? It removes air and moisture from the lines and confirms there are no leaks before gas is released — skipping it hurts cooling and lifespan.
Can a poor installation void my warranty? Yes — unofficial installation or gas work can void it; use authorised, qualified technicians.
How much does AC servicing cost? A pre-summer service/clean is the cheapest recurring job; gas refills and major repairs cost more — exact rates vary by city.
Is AC installation included when I buy? Often included or low-cost from a good retailer; extra piping beyond the standard length costs more.
Do you offer cash on delivery? Yes — with delivery across Rawalpindi & Islamabad and nationwide shipping.
