Smeg SNZ91MFX - Manual (Page 17)

Instructions for the user
19
14.PROBLEMS AND CAUSES
13.5 Preventive maintenance
This appliance does not need any special maintenance. However, a few simple operations have to be
carried out periodically to prevent malfunctioning:
Burners: the burners must be cleaned after every use to ensure correct combustion; make sure that all
the openings and flame ports are clean and free of obstacles, and that the burners rest firmly on their
supports.
Gas connection: the gas connection must be checked periodically (at least every 2 years). Each time
the cooker is moved the connection may be stressed: test it for leakages using special sprays or a
solution of soap and water.
Flexible pipes: if a flexible pipe is used, it must be inspected periodically (once a year) for leakages: if
the surface of the pipe appears rigid and cracked, disconnect immediately the cooker from the gas
supply and replace the pipe with a new one.
Valves: if the gas valves get stuck or hard to turn, they need to be cleaned and re-greased; this
operation must be carried out by an authorised person
Oven gasket: with time the oven gasket may harden and crack on the surface, resulting in leakage of
heat from the oven and higher temperatures on the control panel and knobs. Check it periodically (once
a year) and replace it if necessary.
Each of the following cases is caused by an abnormal operation of the appliance and should be dealt
with by a authorised person: please contact your local dealer or Service Center in case you detect any of
these malfunctioning.
PROBLEM CAUSE WHAT TO DO
The flame is very long with bright
yellow tips.
Black deposits on the bottom of the
pans. Defect of comburent air or
incorrect injectors. Call Service Center.
The flame is very short and noisy.
The flame moves away from the
burner ports. Excess of comburent air. Call Service Center.
The flame extinguishes when the
burner knob is set to the low flame
position. Incorrect adjustment of the
minimum heat input or excess of
comburent air. Call Service Center
The valve knob is hard to rotate. Gas valve worn out or needs
lubrification. Call Service Center.
The cooker suddenly stops
working during operation of the
oven.
The electronic programmer is not
operating.
Overheating of the appliance. Overheating of the appliance. Let the appliance cool down: the
safety thermal cut-out will self-
reset when the temperature has
decreased to a correct value.
Should the problem arise again,
call the Service Center.