Condo ran warm after install: energy-saving mode left on

A new Clementi condo had a unit installed that cooled well for a few minutes, then drifted warm again before settling into a strange, repeating cycle. This university-adjacent area sees frequent condo turnover. An energy-saving mode left on from setup looks like normal operation until the cycling gets noticed.

By Team Snowflake | Updated 28 Jul 2026

Case summary

Daikin Wall-mounted2 years oldCondoClementi, Singapore

Concern: The reading was a brand-new unit already faulty somehow, and heading for a full warranty replacement.
Found: Energy-saving mode left switched on from the installer's setup routine, capping the compressor and letting the room drift warm
Key check: Checked the remote's operating mode before assuming a defective new unit
Result: The unit has cycled normally and predictably every single day since the mode was corrected a few weeks ago. The homeowner avoided pursuing a warranty replacement for a unit that was never actually faulty in the first place.

What we were told

Cooling held normally for a short while after switching on, then the unit seemed to lose track of the room temperature entirely and cycled oddly afterward. This had happened since the very first day of use. The condo itself was a recent purchase with the unit installed during move-in.

What we checked

A unit that misbehaves from day one usually reflects its setup, not its factory. Commissioning steps were the place to start. A factory fault usually shows a far more obvious symptom than odd cycling like this. We checked the remote's operating mode settings before assuming anything was wrong with the unit itself.

The unit itself powered on and ran mechanically fine throughout, with no fault codes appearing at any point.
The remote had been left on an energy-saving mode from the installer's original setup and demonstration.
That mode was capping the compressor's output well below what the room actually needed to stay cool.
Once switched back to normal mode, the unit read and responded to the actual room conditions exactly as expected.

What we found

During the original installation, the installer likely used the energy-saving mode to demonstrate quiet operation before handover, then never switched it back. This likely happened in the rush of a move-in day install. With the compressor capped by that mode, the unit could cool the room briefly on start-up. It then lost ground as the capped output fell behind the room's actual cooling need. That gap created the odd pattern the homeowner noticed from day one.

What fixed it

We switched the unit back to normal operating mode and tested its response against the room's actual conditions over several full cycles. We did not recommend a warranty claim, since the unit itself was never actually defective. We advised confirming the operating mode is checked and reset, not just demonstrated, at the end of any future installation visit.

Outcome

The unit has cycled normally and predictably every single day since the mode was corrected a few weeks ago. The homeowner avoided pursuing a warranty replacement for a unit that was never actually faulty in the first place.

What this case teaches us

Strange cycling after a new install often means a leftover setting, not a defect

Odd cycling on a brand-new unit is more often a leftover setting from installation than a factory defect.
An energy-saving mode left switched on can cap the compressor enough that the room drifts warm again after an initial cool burst.
Ask whether every operating mode was checked and reset to normal before pursuing any warranty claim.

Questions this case answers

Can a brand-new aircon cool for a few minutes and then go warm again?

Yes, and on a new unit a setting is a likelier cause than the hardware. This Clementi bedroom unit cooled briefly at start-up then lost ground. An energy-saving mode had been left switched on from the setup routine, capping compressor output below what the room needed, so the temperature drifted back up.

How do I check whether a setting is behind odd cycling on a new unit?

Start at the remote and read the active operating mode before anything gets opened up. The unit powered on and ran mechanically fine here with no fault codes at any point, which is not the shape a factory fault usually takes. Switching back to normal mode let it respond to real room conditions.

Should I file a warranty claim for odd cycling on a new unit?

Not before the operating mode has been checked. Nothing was defective here; the compressor was simply held back by a mode left on after handover. We tested the response across several full cycles once the mode was corrected, and it has tracked the room properly since.

Can a demonstration setting be left switched on after a new install?

It happens, particularly on a busy move-in day. Energy-saving mode is useful for showing quiet operation during handover, and switching it back afterward is easy to overlook. Confirming the operating mode is reset, not merely demonstrated, at the close of an installation visit keeps it from carrying into daily use.

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