I really appreciate how honest and efficient this company is. They identified the problem quickly and fixed it without unnecessary charges. I would definitely recommend them!
M
Matthew Lim
Aircon Compressor Repair in Singapore
The compressor is the most expensive component in the system. When it fails, the unit stops cooling entirely. We diagnose the actual fault — capacitor, wiring, relay, or the compressor itself — before recommending any repair or replacement.
How we approach compressor issues
Test the circuit before blaming the compressor
A failed capacitor causes the same symptoms as a dead compressor — but costs a fraction to fix. We check the cheap possibilities first.
We tell you when a new system makes more sense
If the compressor replacement costs more than the unit is worth, we tell you. No point spending on a compressor when a new system makes more sense.
Proper recommissioning after replacement
A compressor swap means the system is vacuumed, leak-tested, and recharged with the correct quantity. We do not skip steps that affect longevity.
Signs of a compressor problem
These symptoms point toward a compressor or compressor circuit issue. Not all of them mean the compressor itself has failed — some are caused by supporting components.
- Outdoor unit runs but the air is not cold
- Outdoor unit hums or vibrates but the compressor does not start
- Breaker trips when the compressor tries to start
- Compressor starts then shuts off within a few minutes
- Unusual noise from the outdoor unit — rattling, grinding, or knocking
- Error code pointing to compressor protection or overcurrent
How compressor diagnosis works
The compressor does not always need replacing. We test the supporting circuit first to rule out cheaper fixes before recommending a compressor swap.
1. Electrical checks
We test the compressor capacitor, contactor relay, and wiring for faults. A failed capacitor is the most common cause of compressor no-start and costs a fraction of a compressor replacement.
2. Compressor winding test
We measure the compressor winding resistance and insulation to confirm whether the compressor motor is healthy or has failed internally.
3. Refrigerant circuit check
We check operating pressures and temperatures to confirm whether the compressor is pumping correctly. A running compressor with abnormal pressures may have a valve or capacity issue.
4. Diagnosis and recommendation
We confirm what has failed and whether the fix is a supporting component or the compressor itself. For older units, we also advise on whether replacement makes more sense than repair.
5. Repair or replacement
The agreed repair is carried out — capacitor swap, wiring repair, or compressor replacement. After replacement, the system is vacuumed, recharged, and test-run.
Pricing
Cost depends on whether the fault is in the compressor itself or a supporting component. We confirm the diagnosis before quoting the repair.
- Diagnostic visit covers electrical and refrigerant circuit checks
- Capacitor or relay replacement is significantly cheaper than a compressor swap
- Compressor replacement cost depends on unit capacity and refrigerant type
- No work starts until you agree to the repair quote
Booking and visit timing
Diagnosis is done on the first visit. If the compressor needs replacing, sourcing and installation are scheduled as a follow-up.
- Diagnostic visit typically completed within an hour
- Capacitor or relay replacement can be done on the same visit
- Compressor replacement may need a follow-up for sourcing
- We confirm timing once we know the part required
What we check
A compressor no-start can be caused by the compressor itself or by any component in its starting and running circuit. We check each one systematically.
- Start and run capacitor — the most common cause of no-start
- Contactor relay — controls power to the compressor
- Wiring connections and terminal block condition
- Compressor winding resistance and insulation
- Operating pressures at suction and discharge
- PCB signals to the compressor circuit
Common compressor faults
These are the faults we see most often in residential split systems in Singapore.
- Failed capacitor — compressor hums but does not start
- Burned contactor — intermittent starting or no power to compressor
- Internal winding failure — compressor dead, no recovery
- Locked rotor — compressor seized, trips overcurrent protection
- Valve leak — compressor runs but cooling output is low
- Overheating from restricted airflow or dirty condenser coil
When compressor replacement may not be worth it
A new compressor is expensive. For older units, the replacement cost can approach the price of a new system. We give you the numbers so you can decide.
- Unit is older than eight to ten years and other components are wearing
- Compressor replacement cost exceeds half the price of a new unit
- Refrigerant type is being phased out and future top-ups will be expensive
- Multiple faults found alongside the compressor failure
What customers say
Highly professional and efficient service! The technicians arrived on time, performed a thorough cleaning, and fixed my aircon issue. Honest pricing, no hidden charges.
I
Irwan Abu Samah
Initially engaged another company to look into the issue with our aircon but was quoted a much higher price. Snowflake clearly explained the issue and what needs to be done, and recommended possible solutions based on their expertise.
R
Rafidah B
Snowflake clearly explained the cause of the issue and what needs to be done, recommended possible solutions based on what is best for the customer.
S
SaifudinDxdin
Compressor repair FAQ
Related reading
Compressor not running?
Describe the symptoms and we will confirm whether a diagnostic visit is the right next step.
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