The humble cooler is India's most underrated appliance: a fraction of an AC's price, a tenth of its electricity, and in dry-heat cities like Delhi, Jaipur or Nagpur, genuinely excellent cooling. The catch? Coolers reward maintenance more than any other appliance — and punish neglect with smelly, weak, mosquito-adjacent air.

The start-of-season service (do this every year)

After eight months of storage, a cooler needs more than a rinse:

  • Replace the pads. Wood-wool (khus) pads cake with dust and mineral deposits and lose most of their cooling effect after one season. Honeycomb pads last 2–3 seasons but need a thorough wash.
  • Descale the tank. Hard water leaves scale that clogs the pump and breeds algae. Scrub with vinegar solution.
  • Service the pump. Check it lifts water to the top distributor and that every channel drips evenly — dry patches on pads are dead cooling area.
  • Oil the motor and check the fan. Blade balance and bearing grease, same as a ceiling fan.
  • Inspect wiring. Water plus twelve-year-old insulation is not a good combination.

The weekly two-minute routine in season

  • Drain and refill the tank — stale water is what makes coolers smell