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F22 error/ low pressure

My vaillant ecotec plus 824 boiler is showing an error code F22 and pressure is down nto 0.2 bar can you shed any light please?

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F.22 Dry fire Too little water in the appliance, water pressure sensor defective,
cable to pump or water sensor defective, pump blocked or defective,
pump output too low

Posted on May 12, 2010

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The answer is that your system is out of water pressure.
Usually there is a nob on the right under the base of the unit near to the small dial to the right of the front cover.
To enable the system to work correctly the needle on this dial should be in the Grey, about midway position.
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Once this is corrected your unit will light up again.
Best of luck. Mike. N.

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