Viessmann VITODENS 242-F Installation And Service Instructions Manual page 140

3.2 to 26 kw gas condensing/solar storage combi boiler gas council no. 41-819-18; 41-819-19 natural gas and lpg version
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Troubleshooting
Repair
(cont.)
Checking the boiler temperature sensor, cylinder temperature
sensor or low loss header flow temperature sensor
A
X3
5
140

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