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Fault code 04 appears if the pressure in the boiler is low
This part (MPN: D003202082) is designed for models within the Powermatic range
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Based on service data: Free faulty pcb board for repair
Vaillant Pressure Relief Valve (Plastic) 178985 100 WB1HA 30kW System Erp (Serial No. 7543423) Fault code 04 appears ifVaillant Pressure Relief Valve (Plastic) 178985 Product Overview The Vaillant Pressure Relief Valve (Plastic) 178985 is a critical component designed for specific Vaillant heating systems. This Spare Part is a genuine replacement component engineered to restore original manufacturer specifications. properly functioning components are vital for the energy efficiency and safety of your boiler. Product Condition Options: This part may be available in
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