Common root causes and diagnosis
When diagnosing "AC bad smell", technicians typically inspect:
- Fungus and mildew growing in stagnant water inside drain pan
- Dead gecko or insect trapped in indoor unit
- Drain pipe connected directly to sewer vent without water trap
Safe DIY checks you can do first
- Pour warm water with mild detergent into drain pan to flush line
- Run dry mode or fan mode for 30 minutes after cooling to dry interior
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AC bad smell in major cities
Common questions
What causes AC bad smell?
Common causes include fungus and mildew growing in stagnant water inside drain pan, dead gecko or insect trapped in indoor unit, drain pipe connected directly to sewer vent without water trap. A verified technician diagnoses the exact fault on site before repair.
How much does it cost to fix AC bad smell in Pakistan?
Typical 2026 labour estimate ranges between PKR 1,500 and PKR 3,500 depending on the city and severity. Parts are extra if replacement is needed.
How long does the repair take?
Most repairs take about 1 h.
Is there a guarantee?
Yes, all repairs booked through Mechanics4U carry a 48-hour workmanship guarantee. If the same fault recurs within 48 hours, the technician rectifies it free of charge.
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