Vaillant Evaporator 8 kW 0020031971

The Vaillant 0020031971 is an 8 kW evaporator used in Vaillant VWS air-to-water heat pump outdoor units. It forms part of the refrigerant circuit, where the refrigerant absorbs heat from the outside air before being compressed and passed to the heating circuit. It is a manufacturer-supplied component for the VWS 81/2 and VWS 83/2 230V appliances.

• Reduced heating output or the appliance failing to reach its usual flow temperature
• Persistent ice or frost build-up on the evaporator that does not clear during defrost cycles
• Visible refrigerant oil residue or evidence of a refrigerant leak at the coil
• Repeated low-pressure or refrigerant-related fault codes on the appliance
• Physical damage to the coil fins or pipework

• Confirm the appliance model and serial number against the manufacturer's parts list to verify 0020031971 is the correct evaporator for your unit
• Check the rating matches the appliance — this evaporator is rated at 8 kW
• Confirm the quantity required, as the outdoor unit may use more than one coil assembly
• Refrigerant circuit work must be carried out by a suitably qualified engineer, so plan the repair accordingly