Specifications

TM013 Vulcan Electric Service Instructions REV: D
D.O.I.: 05/09
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22
Noisy Water Heater
Check for:
(A) Mineral build up on the element
(B) Mineral or sludge build up in the cylinder
(C) Normal noises associated with heating water
Check for restrictions in pipe work, faulty valves,
loose plumbing or other appliances i.e washing
machine or dishwasher.
Fit 600kPa PLV if pressure excessive
NO
YES
Check for faulty stop cock, non-return valve
or T&PR valve
NO
YES
NO
YES
NO
Cylinder contracting due to pressure release when
hot tap opened. This can also be accompanied by a
creaking or cracking sound from the insulation.
This noise is normal operation
YES
Check all other appliances that can generate noise
i.e. washing machine, dishwasher, ball cocks etc.
NO
YES
Noisy water heater diagnostic
Consult water hammer in Chapter Common Faults
Is the noise only evident during the
heating cycle?
Is the noise water hammer?
Is the noise only evident when water is
flowing through the water heater?
Is the noise a metallic dropping sound?
Is the water pressure more than 80% of
the T&PR valve rating?