Vailant ecotec Flow Return f23 problem

[zaceverett]

Please can anyone let me know if the NTC thermostats are on the correct way around??

I did have problems with the return pipe heating up before the flow so I'm thinking the last plumber may have swapped them around somehow.

Havin now reconfigure the central heating i've plumbed in all the pipes as per manufacturers instruction but I'm getting f23 errors.

Please can anyone check to make sure the plumber hasn't swapped the ntc thermostats. ont he flow return inside the boiler. I've included a pic here.

The blue wire is currently going to the Flow and the Red wire to the Return

 

[ShaunCorbs]

Are you sure you’ve piped the flow to the flow ?

There should be a wiring diagram in the boiler instructions book that will list the wires etc

 

[zaceverett]

Are you sure you’ve piped the flow to the flow ?

There should be a wiring diagram in the boiler instructions book that will list the wires etc

Ok had a look in the wiring diagram in the manual.
The blue wire thermistor is supposed to go to the Return and the red wire thermistor is supposed to go to the Flow.
I've swapped them around and the boiler works like a treat.
The Flow is definitely plumbed onto the Flow on the boiler and the Return - Return.

I had previous questions on here wondering why my Return in to the boiler was getting hot way before the Flow Out.

I can only assume that the plumber who installed it initially got it all wrong and then flipped the thermistors to prevent the F23 NTC error.

Thanks for the suggestion.