Cooler Motor, Pump and Spare Parts Guide
The motor, the pump and the pads are the parts of a room cooler that work hardest and wear out first. Knowing them helps you buy a better cooler and fix a weak one.
Updated 11 November 2026
Cooler motor
The motor spins the fan. Many brands list copper winding (for example Nasgas "100% copper motor" and Canon "copper motor 1400 RPM"), which runs cooler and lasts longer than aluminium. Inverter coolers use a BLDC motor with a controller. If the motor hums but does not spin, the capacitor is often the cause; if it smells burnt, the winding may be damaged.
Cooler pump
The pump lifts water to the top of the pads. Nasgas lists pump flows from 600 to 3000 L/h. If the pads stay dry, check that the tank has water, the pump inlet is not blocked by dirt or algae, and the pipe at the top is not clogged.
Cooler pads and jali
Pads hold the water the air passes through. Honeycomb pads last several seasons; grass (wood wool) pads usually need replacing every summer. See cooler pads.
DC cooler kit
A 12 V DC kit (DC motor, DC pump and switch) is used to convert or repair DC coolers. Ready-made DC coolers are simpler: see 12V DC Air Cooler Price in Pakistan.
When to buy new instead
If the motor and pump both need replacing and the body is old or rusted, a new cooler with a fresh motor, pump and pads is often the better value. See Air Cooler Price in Pakistan.
BLDC motor for air cooler
A BLDC (brushless DC) motor is what makes an inverter cooler low-watt. It uses magnets and an electronic controller instead of brushes, so it wastes less power as heat and keeps a steady speed on low voltage. Super Asia lists its BLDC inverter models as working from 150 to 240 V.
Retro-fitting a BLDC motor into an old cooler is possible but needs the right controller and fan match. Often a new inverter cooler is the simpler choice. Compare models on Inverter Air Cooler Price in Pakistan and Inverter vs DC Air Cooler.
12 V DC motor and pump
A 12 V DC cooler has a 12 V motor and a 12 V pump that run straight from a battery. If you are converting a cooler to 12 V, both the motor and the pump must be 12 V, and you need a fuse and thick, short wires. A ready-made DC cooler such as Nasgas NAC-9400 DC 60 Litre Solar Air Cooler saves that work. See 12V DC Air Cooler Price in Pakistan.
