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Troubleshooting; Initial Operation; Temperature - Bosch 660 EF User Manual

Indoor model/ natural gas/lp gas boilers
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Troubleshooting

7
Troubleshooting
7.1

Initial Operation

Unit does not attempt to ignite when
water is running.
Unit attempts to ignite but fails.
Table 9
7.2

Temperature

Hot water is not available when a
fixture is opened.
No water is available when a fixture is
opened.
The hot water is not the correct
temperature.
(Using the remote controller)
Water takes time to become hot
when turning the hot water fixture.
The water is too hot.
Table 10
40
Check for reversed plumbing or crossed pipes.
Check the water drain valve filter.
Reset unit and try again. There may be air in the gas line.
Have a professional check the gas supply pressure.
Are the gas and water supply valves fully open?
Is the water supply cut off?
Is the hot water fixture sufficiently open?
Is the gas being cut off by the gas meter? (Can other gas devices such
as stoves be used?)
(For LP) Is there enough gas in the tank? (Can other gas devices such
as stoves be used?)
Is the water drain valve filter clogged?
(Using the remote controller) Is the power button turned on?
Is the water supply cut off?
Is the heater frozen?
Is the hot water fixture sufficiently open?
Have you allowed enough time for the cold water in the pipes to drain
out?
Is the water supply valve fully open?
(Using the remote controller)
Is the water temperature setting appropriate?
If the water supply temperature is high, it is possible for the temperature
to be higher than the temperature set on the remote controller.
If only a small amount of hot water is demanded, it is possible for the
temperature to be higher than the temperature set on the remote
controller.
6 720 644 063

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660 efo