Ariston Circulation Pump 5m PWM 60001947-02

The Ariston 60001947-02 is a circulation pump (Pumpenzirkulator) rated at a 5 m head with PWM speed control. It is the pump that moves water around the heating circuit of the appliance, and its PWM connection lets the boiler control board vary pump speed to match demand rather than running at a fixed rate.

It is supplied as a spare for Ariston CLAS PREMIUM EVO and CLAS PREMIUM EVO SYSTEM wall-mounted boilers. The part is listed under the manufacturer code 60001947-02 and replaces earlier numbers 60001947 and 60001947-01.

• No heating or no hot water because the pump is not turning
• Pump runs but the boiler reports a circulation or flow fault
• Radiators stay cold or heat unevenly while the boiler fires
• Grinding, humming or rattling noise from the pump body
• Pump speed does not change with demand, pointing to a failed PWM signal or seized rotor

• Confirm your boiler model and serial number against the compatibility list, as the pump is specific to the CLAS PREMIUM EVO range
• Check the number on the pump you are removing: earlier versions carry 60001947 or 60001947-01
• Inspect the pump gasket and sealing faces before refitting and renew them if they are compressed or damaged
• Isolate the electrical supply and drain or isolate the water circuit before removing the old pump