Section 8: fault finding
Page 30
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 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
No
No
No
No
Yes
No
8.3 no fLoW from Hot WAtEr tAPS
No flow from hot water taps
Mains supply disconnected?
Mains supply disconnected?
Mains supply disconnected?
Open supply valve or wait for
supply to be reconnected
Clean line strainer
Repair or replace thermostat
No
No
No
Yes
Yes
Yes
Yes
Yes
Test for correct operation. If water is still not flowing, contact a
competent engineer