Central AC compressor service in Petromin

Many cases labelled 'failed compressor' are actually a weak capacitor, a burnt contactor or a loose connection, all of which can be fixed without touching the compressor. If winding tests show insulation breakdown or there is an internal mechanical fault, replacement is needed, and the root cause must be dealt with first.

This happens when the new compressor is fitted without fixing the original problem: a mismatched capacitor, high pressure left trapped in the circuit, or oil contamination in the line. The new unit faces the same load that destroyed the old one, so it trips the breaker or fails in its turn.

High temperatures raise the discharge pressure in the circuit and push the compressor beyond its normal operating load. Add warm air trapped around the outdoor unit or low refrigerant and the compressor overheats, shuts down on thermal protection or fails. The check covers outdoor unit ventilation and circuit pressures together.

Each forced start-and-stop cycle raises the winding temperature and speeds up insulation breakdown. The lubricating oil loses its properties under excess heat and builds up in the line. Within a few weeks a simple capacitor fault becomes a complete compressor failure that needs replacement rather than repair.

Yes. If liquid refrigerant reaches the compressor instead of vapour, the valve reeds inside break quickly. The technician checks the charge level, the condition of the evaporator coil and the fall of the suction line before starting the unit, and confirms that the pressures on both sides of the circuit match what is printed on the unit's nameplate.

The capacitor may be weak, the outdoor condenser could be dirty and blocking cooling, or oil circulation may be low. We check all these points, clean the condenser and regulate the oil before any replacement.

Sparking on start-up could come from a weak contactor or loose electrical connections in the control panel. We check the connections and contactor, tighten them and confirm the circuit before restarting.

Yes, longer lines increase pressure and heat loss along the run. We check the system pressure and assess whether the refrigerant charge is adequate or needs a calculated top-up based on the line length.

Regular condenser cleaning reduces the load on the compressor and extends its life. Dirty condensers raise pressure in the system, forcing the compressor to work harder and overheat faster.