let by test required if fixing non gas boiler fault?

[Marco]

New to gas, so please bear with possibly stupid questions...

If you were say replacing a faulty diverter valve or similar non gas problem, would it be best to do basic gas tests as you are working on the boiler? I think so - but as not touched gas pipes is it required?

cheers

 

[villa_tom]

If you dont touch the "gas train" then you dont have to do a drop test. However if you take the cover off a boiler then you do have to do boiler safety checks ie gas rate, burner pressure, inspect flue etc. I have just worked on water parts on a boiler and done a drop test on the appliance only using the inlet on the gas valve just to make sure I have not disturbed anything. I always do what make me feel happy when it comes to working on boiler.

 

[Marco]

cheers Tom - makes sense

 

[obseen16]

regardless of what i replair on boilers i always do let by and tightness tests prior and after repair for my own peace of mind if nothing else. it doesnt take much effort and it doesnt take long so i just do it.

 

[Dotty]

We also do FGA tests on every boiler we look at now.

My mate went to a boiler that weren't working earlier this year and found a wire had dropped of the NTC. Fired up the boiler and all looked to be ok, he hadn't opened the combustion chamber or touched the flue so didn't even occur to him to FGA it.

He got called back an hour or so later because the boiler was threatening to bounce off the wall.

CO readings went offscale! He isolated, capped and labelled it then called me.

Turned out the boiler was prefitted in the portacabin by the suppliers and was set up for NG.

When the portacabin was delivered to site someone, and to this day I still haven't found out who, just ran a gas supply from the adjacent LPG bulk storage tank.

Now every boiler we look at, oil and gas, gets FGA'd and drop tested.