Quick answer
Car AC Bad Smell: the most common causes are mold and bacteria growing on evaporator coil and drain pan from hyderabad humidity, blocked ac drain pipe causing water to pool and become stagnant, old cabin air filter loaded with dust, mold, and bacteria. Metre Per Second (KPHB, Hyderabad) diagnoses the exact fault and repairs it same-day — typical work runs ₹1,500 – ₹3,000, with free pickup and drop across Hyderabad, OEM-grade parts and a 1-year warranty. Call +91 8555824915.
What causes Car AC Bad Smell?
These are the faults we most often find behind this symptom on cars driven in Hyderabad's heat and stop-go traffic:
- Mold and bacteria growing on evaporator coil and drain pan from Hyderabad humidity
- Blocked AC drain pipe causing water to pool and become stagnant
- Old cabin air filter loaded with dust, mold, and bacteria
- Dead rodent in HVAC ductwork (common in cars parked long-term)
- Refrigerant leak — sweet or chemical smell from R134a
Repairs & indicative pricing (INR)
| Repair | Indicative price |
|---|---|
| AC evaporator antibacterial fogging | ₹1,500 – ₹3,000 |
| Cabin air filter replacement | ₹500 – ₹1,500 |
| AC drain pipe cleaning | ₹500 – ₹1,500 |
| HVAC duct disinfection | ₹2,000 – ₹4,000 |
| AC evaporator deep clean | ₹5,000 – ₹10,000 |
Final price depends on diagnosis. We share a written estimate before any work — no surprises. Free pickup & drop across Hyderabad, OEM-grade parts and a 1-year warranty.
Frequently asked questions
Why does my car AC smell musty in Hyderabad monsoon?
Hyderabad's monsoon (June–September) is prime time for car AC odour — high humidity causes moisture to condense heavily on the cold evaporator coil. If the drain is even partially blocked, this moisture sits and breeds mold within days. The musty smell is mold spores being blown into the cabin. Metre Per Second's evaporator antibacterial fogging treatment (₹1,500–₹3,000) kills mold and bacteria inside the system and eliminates the smell within 24 hours.
Related car problems we fix in Hyderabad
Why Hyderabad drivers choose Metre Per Second
- Factory-grade diagnostics — we read the real fault, not just a generic code.
- Free pickup & drop across all of Hyderabad — KPHB, Kukatpally, Miyapur, Hitech City, Gachibowli, Banjara Hills, Secunderabad and more.
- 1-year unconditional warranty on parts and labour.
- Transparent, written estimates — typically 30–50% below authorised dealers.