Viessmann D6 Error Direct

A stuck pump, airlock, or blocked filter can cause the flow switch to trigger a D6 error because water isn't moving through the heat exchanger fast enough.

The fan motor may be burnt out, jammed with debris, or suffering from worn bearings. viessmann d6 error

The fan is not spinning fast enough or has failed entirely, failing to create the necessary suction for the air pressure switch. A stuck pump, airlock, or blocked filter can

: When you call your technician, tell them specifically that you see a D6 error on an EA1 module : When you call your technician, tell them

A: A reset may temporarily clear the error, but if the underlying physical problem remains, the error will return. Some users have reported needing to perform daily resets, which is a clear sign of a persistent issue.

| Step | Action | |------|--------| | 1 | Check other gas appliances work | | 2 | Ensure gas meter has credit / valve open | | 3 | Reset the boiler | | 4 | Thaw any frozen condensate pipe | | 5 | Call a heating engineer if none of the above works |