Viessmann boiler error 2D
Viessmann boiler error 2D is the most common error among all Viessmann boilers.
The following are the possible causes of viessmann boiler error 2D:
– Water temperature sensor failed
– External water pressure sensor failed
– Thermocouple failed
Viessmann boiler error 2D is a problem where the user does not cause the location of the boiler itself. This can happen when the furnace is installed in an area with a higher temperature than normal.
To fix this problem, you will need to update your setup so that it will be able to detect whether or not there are any errors in your installation from now on.
The error code 2D relates to the boiler control valve.
When the boiler is on, a solenoid valve blocks any water from going up from the boiler to the high-pressure pump. When it’s off, it lets water go up to the pump.
The 2D error code occurs when this valve becomes stuck in the open position and doesn’t close when commanded by your home heating system.
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