Glow worm 18sx pressure switch

[FreddieC]

I wish to drain down boiler to clean pressure switch on Glow Worm Flexicom 18sx boiler, but which drain valve would I use as there are two, one on flow and one on return? Also is the pressure switch easy to remove and reinstall?

 

[Steelmasons]

Piece of cake.

 

[FreddieC]

Hi steelmasons, any further info on my question? Cheers.

 

[Agile]

Why do you want to remove it and clean it?

 

[45yearsagasman]

Maybe it's blocked and not sensing properly. Just a thought.

 

[FreddieC]

That's why I want to remove it, to clean out the muck which is causing F9 fault for which I constantly need to jack up the pressure slightly. It's at 2bar from cold now.

 

[Agile]

My experience is that most become faulty and need to be replaced.

Usually actually working but having an offset reading.

Muck only slows down the response.

Tony

 

[FreddieC]

Job done today. Switch wasn't that dirty. Some particles came out but nothing drastic. Operating pressure is back to something more sensible, 1.4bar.

 

[Agile]

If blocked its often more so on the boiler side of where the sensor sits!