7. Troubleshooting
Symptom Likely Fault(s) Remedy
Water not heating Thermal cut-out needs re-setting Reset as section 11.
Element failure Replace.
Thermostat failure Replace.
Thermal cut-out failure Replace.
Electrical supply failure Check supply is present.
Water too hot Thermostat set too high Reduce setting.
Fit thermostatic mixing
valve.
Water milky coloured Dissolved gases coming out of solution No action needed.
as they are heated – this is normal Water will turn clear after
condition for pressurised systems standing for a few seconds.
Water discharged during Expansion vessel has lost its charge Re-pressurise vessel as
heating cycle only section 15.
Water discharged all the Either the pressure reducing valve is Replace appropriate valve.
time failing to reduce the water pressure
to 3 bar approx, or one of the safety
valves is operating at below is nominal
level.
To differentiate measure the water
pressure downstream of the pressure
reducing valve. If the pressure is more
than about 4 bar, replace the pressure
reducing valve.
If the pressure is less than 4 bar, replace
the safety valve that is opening.
No / limited water flow Check mains water is turned on. Check pressure reducing
valve for grit.
Mixing valves not working Unbalanced pressure. Ensure cold is tee-ed off
correctly after pressure
reducing valve so hot
and cold are at equal
pressure.
8. Guarantee and service policy
This product is guaranteed against faulty materials and manufacture for a period of one year from the date of
purchase. Hycowill in its sole discretion replace, repair or refund any faulty unit. Incorrect installation, frost
damage, and the consequences of limescale deposits are excluded. Consequential costs such as labour
charges or damage to fittings and surroundings are expressly excluded.
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