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- 24 Nov 2015
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Had a call today regarding a random F22 fault on a customers boiler. As per MI it states "Dry fire, low water in system/Overheat"
Boiler worked fine in all modes during inspection for 1hr not one F22 fault. But customer wants repairing as he claims it happens 3/4 times a day.
Not wanting to throw my time and customers money at it I suspect NTC sensors or Pump and lastly PCB.
But before I do that please clear this up for me... These boilers do not have Water pressure Sensors!! I know they have aqua sensor for HW. However when I dropped down the front cover connected into the pipe via a o-ring and clip is what seems to be a Low Water Pressure Sensor? Its a black cylinder shape with a wire preformed to it that connects to the PCB.
Ive searched through the MIs online and not once did I see this on an exploded diagram or in the short parts list. I though these boilers worked on NTC sensors.
Going call Tech in morning but any help now?
Boiler worked fine in all modes during inspection for 1hr not one F22 fault. But customer wants repairing as he claims it happens 3/4 times a day.
Not wanting to throw my time and customers money at it I suspect NTC sensors or Pump and lastly PCB.
But before I do that please clear this up for me... These boilers do not have Water pressure Sensors!! I know they have aqua sensor for HW. However when I dropped down the front cover connected into the pipe via a o-ring and clip is what seems to be a Low Water Pressure Sensor? Its a black cylinder shape with a wire preformed to it that connects to the PCB.
Ive searched through the MIs online and not once did I see this on an exploded diagram or in the short parts list. I though these boilers worked on NTC sensors.
Going call Tech in morning but any help now?
