Zodiac - Compressor heater Z900 TD20 - R07799

Zodiac – Compressor heater Z900 TD20 – R07799

The Zodiac R07799 is a genuine OEM compressor heater (also referred to as a compressor anti-frost or crankcase heater) designed as a direct replacement spare part for the Zodiac Z900 TD20 heat pump. This component is fitted around or directly to the compressor body and uses resistive heating to maintain the compressor oil at a minimum safe temperature during periods of inactivity, particularly in cold ambient conditions. By preventing refrigerant from migrating into and diluting the compressor lubricating oil during standby, the heater safeguards compressor integrity and extends the operational lifespan of the heat pump unit.

Compressor heaters are a critical protective element in heat pump technology. When a heat pump is switched off in cold weather, refrigerant can condense and mix with the compressor oil. On start-up, this diluted oil provides inadequate lubrication, which can cause premature compressor wear or failure. The crankcase heater eliminates this risk by keeping the compressor warm enough to discourage refrigerant migration. This is especially important in climates where the heat pump may sit idle overnight or during shoulder seasons when ambient temperatures drop significantly.

Technical characteristics and compatibility

The R07799 is listed in official Zodiac and Fluidra catalogues — including the 2018 and 2020 Zodiac Pool Care Equipment catalogues — as the designated compressor heater for the Z900 TD20 heat pump model. As a genuine Zodiac spare part, it is engineered to the exact specification of the original component, ensuring correct wattage, physical fitment, and electrical compatibility with the Z900 TD20’s internal wiring harness. Using an original manufacturer component guarantees that the heater operates within the thermal and electrical tolerances defined for this heat pump series.

Installation involves accessing the compressor compartment of the Z900 TD20 unit. This work should be carried out by a qualified technician familiar with heat pump refrigeration circuits and electrical systems. The heater connects into the existing circuit within the unit and requires no external modification.

Suitability and application

This spare part is intended exclusively for owners and service technicians maintaining or repairing a Zodiac Z900 TD20 swimming pool heat pump. It is not a universal component and is not interchangeable with heaters from other heat pump models or brands without verification. If your Z900 TD20 heat pump has suffered compressor failure potentially related to refrigerant dilution, or if a routine service inspection has identified a faulty or open-circuit crankcase heater, the R07799 is the correct like-for-like replacement. It is suitable for residential and semi-commercial pool installations where the Z900 TD20 heat pump is in service.