FAULT FINDING
SECTION 7
23
FAULT
ACTION
WATER
(a) Reset thermostat to lower temperature.
TEMPERATURE
(b) Thermostat faulty. Check and replace if necessary.
TOO HIGH
(c) Main gas valve not closing. Clean or replace.
WATER
(a) Reset thermostat to higher temperature.
TEMPERATURE
(b) Check gas pressures at burner and at gas inlet to heater.
TOO LOW
(c) Thermostat faulty. Check and replace if necessary.
NOT ENOUGH
(a) Check gas pressures at burner and at gas inlet to heater.
HOT WATER
(b) Check amount of water being used against recovery rate
given on data plate. If usage too high, more heating
capacity needed.
WATER DRIPPING
(a) Check if this stops when water in heater is hot. If yes, then
FROM BASE OF
condensation is the problem caused by incorrectly designed
HEATER
flue or by tank cooling excessively, i.e. more hot water
being used than recovery rate of heater. If so, more
heating capacity needed.
(b) If water continues to drip when heater is hot, problem is
leaking joint or storage vessel.
RUMBLING NOISE
(a) Scale formation in heater, consult water treatment
specialist. Heater must be descaled and suitable water
treatment provided to avoid re-occurrence.
