Viessmann Vitodens 333-F Service Instructions Manual page 92

Compact gas fired condensing boiler 3.8 to 26 kw natural gas and lpg version
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Troubleshooting
Repairs
(cont.)
92
1. Pull the leads from flue gas tem-
perature sensor A.
2. Check the sensor resistance and
compare it with the curve.
3. Replace the sensor in case of
severe deviation.

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