Page 26 Section 8: Fault Finding
8.4 COLD WATER FLOW FROM HOT WATER TAPS
Cold water from hot water taps
Is programmer calling for hot
water?
Is motorised valve working?
Is boiler/heat pump working?
Check and set hot water
setting
Is cylinder stat calling for
heat?
Check motorised valve and
microswitch
Has thermal cut-out operated?
Check and reset button
Check and replace cylinder
thermostat
Test for correct operation. If
water is still cold, contact a
competent engineer.
Yes Yes
Yes
Yes
Yes
NoNo No
No
Yes
No
8.3 NO FLOW FROM HOT WATER TAPS
No ow from hot water taps
Mains supply disconnected?
Check any in-line strainers which may be tted to the
system and clean as required
Open supply valve or wait for
supply to be reconnected
No
Yes
Test for correct operation. If water is still not owing, contact a
competent engineer
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