AC Not Cooling
After Service? Causes & Fix (2026)
Your AC was just serviced but cooling hasn't improved — or got worse? This frustrating scenario is more common than you think. Here's why it happens and what to do.
You just paid for AC service, but now the cooling is worse — or non-existent? This frustrating situation is unfortunately common in India. The good news: most post-service cooling issues are due to technician error, not your AC failing. Here's how to identify the problem and get it fixed at no extra cost.
Quick Fix — Check Service Work
Check if filters are properly installed, ensure gas was refilled correctly, and restart the AC. Many service-related issues are due to improper handling — filters left out, gas not filled properly, or connections left loose.
Quick Answer
If your AC is not cooling after service, it is usually due to improper gas refill, gas leakage caused during service, filter not installed correctly, incomplete cleaning of coils, or electrical connections left loose.
Read the complete AC not cooling guide →Why AC Is Not Cooling After Service
Improper Gas Refill
The most common post-service issue. Technicians may underfill or overfill gas, use incorrect refrigerant type, or fail to properly evacuate air before filling. Underfilled gas means weak cooling; overfilled gas can damage the compressor. Many technicians also skip the leak test after refilling.
Check your service receipt for gas weight added. Ask the technician to verify pressure readings. If cooling is weak, demand a pressure check and proper refill.
Gas Leakage After Service
Service work involves opening flare nuts, valves, and connections. If not properly tightened or if old gaskets are reused, gas leaks can occur immediately after service. The AC may cool fine for 1–2 days, then performance drops as gas escapes.
If cooling was good immediately after service but declined within a week, you have a leak. Call the service center and demand a free callback — this is their responsibility.
Filter Not Installed Correctly
During cleaning, technicians remove filters. Sometimes they're not properly reinserted, left partially out, or installed backwards. This restricts airflow and reduces cooling immediately. Some technicians also forget to reinstall the filter entirely.
Open your indoor unit panel and check the filter is properly seated, facing the correct direction (usually arrow pointing toward the unit), and fully inserted.
Incomplete Cleaning of Coils
Proper service includes cleaning both indoor (evaporator) and outdoor (condenser) coils. If the outdoor coil is still dirty, heat cannot be released properly, reducing cooling capacity. Some services only clean filters and skip the coils entirely.
Visually inspect the outdoor unit fins — they should be clean and free of dust/debris. If still dirty, the service was incomplete.
Electrical Connection Issues
Service work involves handling electrical connections. Loose wires, incorrect reconnection, or damaged terminals can cause the compressor to not start properly or run intermittently. This is dangerous and can damage your AC.
If the outdoor unit is not running or makes clicking sounds, there may be an electrical issue. Call the service center immediately — do not attempt to fix electrical problems yourself.
What to Check After Service
Check Filter Installation
DIY CheckOpen the indoor unit panel and verify the filter is properly seated, fully inserted, and facing the correct direction. The arrow on the filter should point toward the unit. If the filter is missing, loose, or backwards, reinstall it correctly.
Restart the AC from Breaker
Free FixTurn off the AC at the circuit breaker for 5 minutes, then turn back on. This resets the system and can clear temporary faults caused during service work. Check if cooling improves after the restart.
Inspect Outdoor Unit
DIY CheckGo outside and check the outdoor unit. The fins should be clean and free of dust. The unit should be running with the fan spinning. If it's dirty or not running, the service was incomplete or there's an electrical issue.
Monitor Cooling Performance
AssessmentRun the AC for 30 minutes and check if the room temperature drops. If cooling was good immediately after service but declined within a week, you likely have a gas leak. Document the issue with photos/videos if possible.
Important: If you find issues caused by the service, you are entitled to a free callback. Reputable service centers offer 7–30 day warranties on their work. Don't pay for another service call to fix their mistakes.
Visual Guide: What to Inspect
Filter Installation
Check filter is properly seated and facing correct direction.
Outdoor Unit Cleaning
Outdoor coils should be clean and free of debris after service.
Service Documentation
Keep receipts showing gas weight added and pressure readings.
Full AC Not Cooling Guide
Complete diagnosis hub
Wasting Electricity?
Running but not cooling = bill waste
Frequently Asked Questions
The most common reasons are improper gas refill (underfilled or wrong type), gas leakage caused by loose connections during service, filter not reinstalled correctly, incomplete cleaning of outdoor coils, or electrical connections left loose. These are service quality issues, not AC problems.
AC Not Cooling After Service — Post-Service Issues & Your Rights
Paying for AC service only to find your cooling has worsened is one of the most frustrating experiences for Indian AC owners. This scenario is more common than it should be — industry estimates suggest 25–30% of service visits result in callbacks due to technician errors. Understanding your rights and the common causes can save you from paying twice for the same problem.
Gas handling errors are the most frequent post-service issue. Technicians may underfill gas to save on refrigerant costs, use incorrect gas types (R22 in an R32 system), skip the mandatory leak test after refilling, or create new leaks by not properly tightening flare nuts. The telltale sign is an AC that cooled adequately before service but is weak immediately after, or one that worked fine for 2–3 days then declined — indicating a leak created during service.
Filter and cleaning errors are equally common but easier to spot. Technicians may forget to reinstall the filter, install it backwards (blocking airflow), or skip cleaning the outdoor coils entirely while only cleaning the easily accessible indoor filter. These oversights reduce cooling capacity immediately and are visible to inspection — check your filter installation and outdoor unit cleanliness before calling for a callback.
Your rights as a customer are important. Reputable service providers — including authorized brand service centers and established third-party services — offer 7 to 30-day warranties on their work. If cooling problems arise after service, you are entitled to a free callback to correct the issue. Document the problem with photos, reference your service receipt, and demand the service center honor their warranty. Do not pay for a new service call to fix their mistakes.
25–30%
Callback Rate
Gas Error
Common Cause
7–30 Days
Warranty Period
Free Fix
Your Right
- Always get a detailed service receipt showing gas weight added, pressure readings, and work performed.
- Check filter installation immediately after service — it's the easiest error to spot and fix.
- Test cooling for 30 minutes before the technician leaves — verify the service actually worked.
- If cooling declines within a week of gas refill, you have a leak — demand a free callback.
- Don't pay for another service to fix their mistakes — reputable centers offer 7–30 day warranties.
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Your Rights
Most authorized service centers offer 7–30 day warranty on service work. If problems arise after service: