Baxi 105e instant

[300017]

I have an intermittant problem. The 80 fault light will flash and I have no water or CH. After a while the 80 light will go out and boiler starts up for water and CH but after 5 sec goes out and 80 goes on this repeats for a while then everything works fine. Fault usually starts when everything is cold. Any ideas?

 

[JPC]

isnt 80 a faulty fan ?....not got the instructions ?

 

[Vic Spanner]

The flashing 80 indicator means your primary ntc sensor is suspect..You can measure the resistance to confirm or if it is a chrome sensor then deffo change it...Part no 5108265

 

[Baxmax]

Sensor or sensors,best to change both

 

[Vic Spanner]

Sensor or sensors,best to change both

Clever clogs i bet your first time fix rate is high

 

[300017]

The flashing 80 indicator means your primary ntc sensor is suspect..You can measure the resistance to confirm or if it is a chrome sensor then deffo change it...Part no 5108265

Thanks - what should the resistance be?

 

[300017]

Sensor or sensors,best to change both

What are the 2 sensors - is one the primary NTC? and what is the other?
Thanks

 

[300017]

Sensor or sensors,best to change both

Thanks - what are the 2 sensors and where will I find them?

 

[Vic Spanner]

Thanks - what should the resistance be?

11 ohms when cold

What are the 2 sensors - is one the primary NTC? and what is the other?
Thanks

Hot water

Thanks - what are the 2 sensors and where will I find them?

Follow the wiring diagram on the back of the boiler cover..Low voltage green and red wires go to them