Aircon PCB repair

We diagnose control board faults before ordering any part. Error codes get traced to PCB, sensor, or wiring. We’ll assess first, then confirm whether this is the right scope before you book.

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BCA-registered10,000+ jobs completed

What PCB repair covers

The PCB controls the unit's logic: startup, temperature regulation, error handling, and communication between indoor and outdoor units. A fault shows up as anything from an error code to a completely unresponsive unit. We test sensors and wiring first, because cheaper parts often mimic board failure. Common situations where PCB work fits:

Error code returns after reset
A persistent code points to the PCB, sensor circuit, wiring, or communication path.
Unit ignores remote commands
If batteries and line-of-sight are ruled out, we check the receiver circuit or control board.
No display or response
Once power supply's confirmed, the board, fuse, or control circuit is the next diagnostic step.

When PCB repair isn't suitable

Don't treat the PCB as the fault until related causes are ruled out. If the board fault isn't confirmed, start with diagnostic visit.

Code clears and doesn't return
Monitor the unit first. A one-off fault isn't enough to quote a board replacement.
Unit responds normally but doesn't cool
Cooling diagnosis starts with airflow, refrigerant, compressor, and coil condition.
Drainage or float-switch code
Real issue's likely water backup or a triggered switch, not the PCB.

What you get

Control fault resolved without guessing at an expensive board.

Board fault confirmed first
We separate PCB, sensor, wiring, and controller paths before quoting a replacement.
Correct board sourced
Indoor PCB, outdoor PCB, or controller replacement matched to the exact model.
Operation verified
We test startup, remote response, temperature control, and communication after the repair.

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What we check before quoting

We confirm whether the fault sits with the board, a sensor, wiring, or the controller before sourcing parts.

Fault code and reset behaviour
We cross-reference the displayed code with the manufacturer table and watch what happens after reset.
Sensor and wiring checks
We test thermistors, connectors, and harnesses, because they trigger board-like symptoms.
Board location
If the PCB's implicated, we identify whether it's the indoor board, outdoor board, or wired controller.
Part availability
We match the correct board to the model and quote before ordering or scheduling replacement.

Sensors, wiring and the receiver are tested before the board is implicated. A replacement board is checked for startup, remote response and communication before we leave. How a job runs, from first message to booking.

Choose the right component scope

Use the general page when the faulty unit is unclear. Choose an indoor, outdoor or driver page when the code or inspection identifies that stage.

Brand-specific PCB repair

Each brand page lists the models we see, that brand’s fault codes, parts lead times and when replacement makes more sense.

Workmanship warranty

We stand behind the repair we carry out, and we are straight about the part of the cover we do not set ourselves.

Labour

30-day workmanship warranty. If the same fault returns from our repair, we come back and the labour is on us, with no second diagnostic visit fee.

Parts

Parts carry the distributor's warranty for that component, so the term varies by part. We tell you both terms before you approve the work.

PCB case patterns

Diagnosis-led case notes, not generic service claims. Open the case if the symptom looks familiar.

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Frequently asked questions about aircon PCB repair in Singapore

How much does PCB replacement cost?

It hinges on the brand, model, and which board has failed. Indoor boards, outdoor boards, and wired controllers are priced differently, and some models use proprietary parts with longer lead times. We quote after diagnosis, and the $30 visit is waived if you proceed.

Can a PCB be repaired rather than replaced?

Sometimes. Component-level repair, replacing a burnt relay or capacitor on the board rather than the whole assembly, can work depending on the fault location and board condition. Some boards are more cost-effective to replace outright; we'll tell you which call this one is.

How long does PCB repair take?

If the replacement board is in stock, the repair is done in the same visit. For less common models, sourcing typically takes 2 to 5 working days. We confirm availability before scheduling.

Do you repair all brands?

Yes. We cover all major residential brands sold in Singapore, including Daikin, Mitsubishi Electric, Panasonic, LG, Samsung, and others. Parts availability varies by model age.

We cover all of Singapore. Find aircon services in your area.

Describe your situation

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

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