Used Boss fans & air coolers in Islamabad & Rawalpindi
Is a used Boss fans & air cooler worth buying?
Boss is a Lahore manufacturer that sells coolers through its own dealer network, and the useful split in its range is not metal against plastic but mains against 12-volt. Boss sells DC coolers meant to run from a battery or solar supply, and second-hand they are easily mistaken for mains units, because the cabinet, pads and tank are the same and only the plate and the motor differ.
Made or assembled in Pakistan
Spares are widely stocked locally and most technicians in the twin cities have worked on these, so common faults are usually economic to repair.
Boss keeps a dealer network in Islamabad and Rawalpindi, so pumps, motors, pads and grilles for its mains coolers are ordinary counter items. The DC side is narrower, and matched adaptors, 12-volt pumps and DC motors are the pieces to establish before buying, because the general appliance market is stocked for mains machines.
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Checking a used Boss fans & air cooler
These are specific to Boss. The general fans & air coolers checks apply too and are on the fans & air coolers page.
Read the voltage plate
Boss sells mains coolers and 12-volt DC ones that look alike from outside. The plate settles which you have, and a DC unit plugged into a wall socket simply does nothing, which is how sellers come to describe a working cooler as dead.
Ask for the adaptor
A DC cooler without its adaptor is half a machine, because the adaptor is sized to the motor's current draw. A generic 12-volt supply that sags under load will turn the fan slowly and heat itself doing it.
Check the pump voltage
On a 12-volt cooler the pump has to be a DC pump as well. A mains pump fitted during some earlier repair will not run off the battery at all, and the giveaway is a pump lead spliced away to its own plug.
Listen for brush wear
Where the DC motor is a brushed type, the brushes are a consumable rather than a fault. Run it at full and listen for a rising whine or a burnt smell, and ask whether the brushes have ever been changed.
What Boss fans & air coolers are worth
- A 12-volt Boss with its matched adaptor holds value better than the same cooler without one, because the adaptor is sized to the motor's draw and a substitute that sags under load will not run it at full speed.
- Mains Boss coolers hold value on the strength of the dealer network, since pumps, motors and pads for them are counter items in both cities.
- A DC cooler with a mains pump spliced into it loses value twice over: the pump will not run from a battery, and the splice tells a buyer the machine has been repaired by guesswork.
General fans & air coolers checks
These apply whatever the badge on the front says — the fans & air coolers page covers them in full.
Spin the blades by hand
With the power off, turn the blades. A healthy fan coasts several turns and stops smoothly. A gritty feel, a rumble or a rotor that drags means dry or worn bushes, and a fan run in that state will cook its winding within a season.
Feel the motor housing
Run it on full for fifteen to twenty minutes, then put a hand on the housing. Warm is normal. Too hot to hold, or a smell like burnt varnish, means the winding is going. That smell never clears, and rewinding a domestic fan seldom repays what it costs.
Watch for wobble
Start a ceiling fan and watch the canopy. Wobble usually comes from a bent blade arm, mismatched blades or a loose down-rod rather than from the motor. Sight along each blade for a bend and check the mounting holes in the arms for elongation, which is what makes a fan impossible to balance afterwards.
Test the start
A fan that hums but only turns once you nudge a blade has a weak capacitor. It is an inexpensive part, but it should be found before money changes hands. Step through every regulator position too: a dead speed points at the regulator or a broken winding tap rather than at the capacitor.
Watch the cooler pads wet
Fill an air cooler's tank, switch the pump on and look at the top of the pads. Water should spread across the whole width within a minute. Dry stripes mean a blocked distributor pipe or a weak pump. Honeycomb pads that have collapsed or gone crusty with salt need replacing before the machine will cool at all.
Press the cooler tank
Push the sides of the water tank and inspect the drain plug and base corners. Plastic that has stood in the sun goes chalky and brittle, and hairline cracks there open up as soon as the tank is full. While you are there, spin the blower wheel by hand for bearing noise and work the swing louvre through its travel.
Boss fans & air coolers — questions
How do I know if a used Boss cooler is a 12-volt model?
Is a used Boss DC cooler worth buying without the adaptor?
Other fans & air coolers brands
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