33
Symptoms
Probable Cause
Recommended Action
No hot water
(contd)
All hot water has
been used.
Check tank volume is adequate.
Faulty
thermostatic mixer
valve.
Consult makers instructions.
Pump runs on
with outlets
closed
Leak in system.
Check tap washers, w/c valve washers,
pipe joints.
Damaged reed
switch or P.C.B.
If pump continues to run, this indicates a
closed circuit in either the flow switch reed
or P.C.B. in the terminal box.
Contact Stuart Turner.
Jammed flow
switch.
Remove outlet hoses and check that flow
switch sits in lowest position. Check float
for free movement.
Pump starts with
all outlets closed
Air in system.
Bleed through system without pump
running until hot and cold services run with
no air.
Flexible hose
leaks
Not fitted
correctly.
Check that the hose is pushed firmly onto
the pump inlet/outlet connections and
pipework.
Damaged ‘O’-
rings.
Check copper pipe ends are cleanly cut and
deburred.
