TM039 Rheem Water Star Service Instructions REV: A
Date of Issue: 02/09
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17
Fault Finding Chart 5
5.
Noisy Water Heater
Check for:
(A) Mineral build-up on the element.
(B) Mineral or sludge build-up inm the
cylinder
(C) Normal noises associated with heating
water.
Check for faulty stop cock, non-return
valve or T&PR valve.
Refer to water hammer causes, under
Common Faults
Check all other appliances that can
generate noise, eg. washing machine,
dishwasher, etc.
Cylinder contracting due to pressure
release when hot tap is opened. This can
be accompanied by a creaking or cracking
sound from the insulation. This noise is
normal operation.
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
popping sound?
Is the
water pressure more
than 80% of the
T&PR valve rating?
YES
NO
NO
YES
NO
YES
NO
Check for restrictionsin pipe work, faulty
valves, loose plumbing or other
appliances, eg. Washing machine or
dishwasher. Fit a 600kPa PLV if pressure
is excessive.
YES
YES
NO
