Zodiac - Aluminium compressor capacitor 50 µF - B0181100A

Zodiac – Aluminium compressor capacitor 50 µF – B0181100A

This is a genuine Zodiac replacement aluminium compressor capacitor with a capacitance rating of 50 µF, designed specifically for use in Zodiac heat pump units. The capacitor plays a critical role in starting and running the compressor motor within the heat pump — it provides the necessary phase shift and starting torque to get the compressor motor running efficiently and to keep it operating stably under load. Without a functioning capacitor, the compressor may fail to start, run erratically, or draw excessive current, potentially causing further damage to the heat pump unit.

As a genuine Zodiac factory spare part, this capacitor is manufactured to the precise electrical and dimensional specifications required by the original equipment. This ensures correct fitment and reliable long-term performance, as opposed to generic aftermarket alternatives that may differ in tolerance or physical size. The aluminium construction of the capacitor housing contributes to its durability and thermal resilience in the demanding environment of a heat pump compressor compartment.

Technical characteristics and compatibility

This capacitor is rated at 50 µF and is confirmed compatible with several Zodiac heat pump models, including the PFPREM 8, PM3041, Z300 M4, as well as the PowerPac 1, PowerPac 2, and PowerPac 3 series. Depending on the specific model variant and production year, some sources also reference this part in the context of 55 µF applications — if you are unsure of the exact specification required for your unit, always cross-reference the part number printed on your existing capacitor or consult your heat pump’s service documentation before ordering.

Capacitors of this type are electrolytic run capacitors used in single-phase compressor motor circuits. A degraded or failed capacitor is one of the most common causes of heat pump compressor failure, making this an important maintenance and repair component. Replacing a faulty capacitor promptly can restore full heating performance and prevent unnecessary compressor replacement costs.

Suitability and application

This part is intended for pool owners, pool technicians, and service engineers who maintain or repair Zodiac heat pumps. It is suitable for residential pool heating installations where a Zodiac PFPREM, PM3041, Z300, or PowerPac series heat pump is in use. If your heat pump is experiencing issues such as the compressor humming but not starting, tripping the circuit breaker, or failing to produce heat, a faulty run capacitor is a common cause and this genuine replacement part is the correct solution for compatible models. Always ensure power is fully isolated before handling or replacing capacitors, as they can retain charge even after disconnection from mains supply.