
THERMAL INNOVATIONS (UK) LTD | THERMAFLOW® ELECTRIC COMBINATION BOILER |
Tel: 0870 850 5207
Fault: No central heating, but hot water at taps
Is there continuity through master high limit stat?
No
Yes
Replace Thermostat
Is there continuity through contactor?
No
Yes
Replace Contactor
Is there ~230-240V at each heating element and
continuity through thermostats within?
No
Yes
Replace or re-set as necessary
Are external controls calling for heat?
No
Yes
Adjust the setting
Is temperature above setting on aqua stat?
(Should be set to
30
o
C
)
No
Yes
Re-check when temperature increases
Check thermostat and lock shield Valves on radiators are
open & calling for heat
Is there ~230-240V and continuity at terminals of the
aqua stat?
No
Yes
Check ~230V Supply
Is pump impeller turning?
No
Yes
Replace central heating pump
Is there ~230-240V supply at central Heating pump?
No
Yes
Check for faulty external controls
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