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Maintenance and Service

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Boilers

Alfa Laval

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Showers

Aqualisa

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Crosswater

Crosswater

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HUB-001A-WAX Vado Thermostatic Cartridge

Hansgrohe

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IB

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S960134NU Thermostatic Cartridge

Sirrus Rothwell R995 Antique Shower

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Boilers

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Servicing Guide

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Gas Safety Inspection

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AGA

Neff

Alfa Laval Cetetherm Mini City - faulty central heating motor M6410C2031

Alfa Laval Cetetherm Mini City - No heating but hot water works

  • If there is no heating but hot water works then check air trapped at the top of the boiler and release by opening a manual air vent (recommendation to replace with an automatic one 3/8)
  • If there is no air then check the pump and a white Honeywell diverter valve on the right hand side
  • if the pump is spinning then check the diverter valve
  • The diverter valve is a slow opening one. It senses the ambient temperature from the room stat and opens accordingly. The full opening might take up to 45 minutes
  • If the valve doesn't open at all (the red plastic will move down) then replace the motor
  • The replacement part is Honeywell M6410C2031 actuator + manual override 24v 300n
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