Grinding noise then shutdown: fan motor bearings worn out

The fan motor ground loudly, then cut in and out. A Sharp 6-0 error pointed at the indoor fan motor, and the unit was thirteen years old. The fix was clear, but the better question was whether to repair a unit near the end of its life.

By Team Snowflake | Updated 28 Jul 2026

Case summary

Sharp Wall-mounted13 years oldHDBWoodlands, Singapore

Concern: Repair would cost a lot, and then the unit would fail again soon given its age.
Found: Indoor fan motor bearings worn out. Motor running intermittently with grinding noise
Key check: Removed indoor fan barrel and tested motor independently. Motor seized intermittently with audible bearing grind
Result: The unit was swapped for a new system, with installation done within three days. That was sooner than the fan motor part would have arrived, so the owner waited less and cooled the room again faster.

What we were told

The aircon makes a grinding noise, and sometimes the fan stops blowing completely. It starts again after a few minutes, but the noise keeps getting worse. The unit is quite old.

What we checked

Grinding with the fan dropping out usually means the motor itself, not dirt or a blockage. We removed the fan barrel and tested the motor on its own to confirm the cause before raising the repair-versus-replace question.

The unit showed a Sharp 6-0 error, which the brand uses to flag an indoor fan motor fault.
The indoor fan motor ran in fits, with a clear grinding sound on every restart.
Rotated by hand, the motor seized for a moment and the bearing surfaces felt rough and worn.
We checked the fan barrel and blower wheel separately. Both were intact, with no damage or wobble to explain the noise.
The unit was thirteen years old, past the ten-to-twelve years a wall-mounted home system usually lasts.

What we found

The indoor fan motor bearings had worn out after thirteen years of constant use. Worn bearings drag, so the motor seized in short bursts. That dragging made the grinding sound and caused the fan to cut in and out, which is what the Sharp 6-0 error reports. The fan motor on this unit is a sealed part, so the bearings cannot be replaced on their own. The whole motor would have to be swapped.

What fixed it

We laid out two options with the trade-offs for each. The first was to replace the fan motor. The Sharp part is not held in stock here and would be sourced from outside, likely a week or more, and the cost was high against what a thirteen-year-old unit is still worth. The second was to replace the whole system. At that age, the other parts are also near the end of their life, so a repair could buy little time. A new unit would cool right away and last for years. The owner chose full replacement after weighing the cost, the wait, and the chance of the next age-related fault.

Outcome

The unit was swapped for a new system, with installation done within three days. That was sooner than the fan motor part would have arrived, so the owner waited less and cooled the room again faster.

What this case teaches us

Grinding plus age changes the repair question

A grinding noise that comes and goes points to worn fan motor bearings, not a blockage you can clean out.
On a sealed fan motor, bearings cannot be swapped on their own. The whole motor has to be replaced.
When a unit is past twelve years, weigh the part cost and waiting time against a full replacement before paying to repair.

Questions this case answers

Grinding noise from the aircon and the fan keeps stopping: what is failing?

Worn fan motor bearings, most likely. Grinding that comes and goes is the sound of bearing surfaces dragging, and the drag makes the motor seize in short bursts. On this Woodlands unit the fan barrel and blower wheel were both intact with no wobble, so nothing external explained the noise.

Can worn fan motor bearings be greased instead of replaced?

Not on a sealed motor, which is what this unit had. The bearings cannot be reached or repacked, so the whole motor has to come out. That constraint turns a small noise into a parts decision, and it is worth knowing before you weigh a repair against anything larger.

Is it worth repairing an aircon that is past twelve years old?

It depends what else is near the end alongside the failed part. A wall mounted home system tends to run about ten to twelve years, and this one was past that. Everything around the motor was ageing at the same rate, so a repair risked buying very little before the next age related fault.

What happens if a replacement part has to be sourced from overseas?

You wait, and the wait becomes part of the decision. This Sharp motor was not held in stock locally and would have come from outside, while a full system could be installed sooner than the part would arrive. The owner weighed cost, waiting time and the odds of the next fault, and went with replacement.

Ready to get started?

Tell us what’s going on. Symptoms, setup, photos, anything we should know. We’ll assess and come back with the right next step.

WhatsApp us