Potterton suprima boiler

[ironman1]

I have never come across a stuck one Iron how many have you seen

Replaced a few of these switches . i've also see quite a few bypassed , the early suprimas were'nt fitted with flow switch , manufacture decided to fit these due to call out rate when under guarantee (dry fire) , they were not considered a safety aspect , suprima in my own house is the early type & has no switch ................i was explaining to the OP how to diagnose if water flow switch is stuck , which is likely if boiler has been sitting for 3 years , whether it's been sitting full of water i don't know.

Why would i think you were being funny? no problem.

 

[ironman1]

Twice

 

[corgiman]

I have never come across a stuck one Iron how many have you seen

Replaced a few of these switches . i've also see quite a few bypassed , the early suprimas were'nt fitted with flow switch , manufacture decided to fit these due to call out rate when under guarantee (dry fire) , they were not considered a safety aspect , suprima in my own house is the early type & has no switch ................i was explaining to the OP how to diagnose if water flow switch is stuck , which is likely if boiler has been sitting for 3 years , whether it's been sitting full of water i don't know.

Why would i think you were being funny? no problem.

I just think some times when you timer a disagreement it looks confrontational.

Now the likes of chrisr will put me right but my understanding is that if a maker puts a control on a boiler that will prevent it from firing up if its condition has not be met is a safety feature and must not be bypassed.

And the stixckness makes sense now you explain it, it has been sitting there doing nowt for a while

 

[ironman1]

I have never come across a stuck one Iron how many have you seen

Replaced a few of these switches . i've also see quite a few bypassed , the early suprimas were'nt fitted with flow switch , manufacture decided to fit these due to call out rate when under guarantee (dry fire) , they were not considered a safety aspect , suprima in my own house is the early type & has no switch ................i was explaining to the OP how to diagnose if water flow switch is stuck , which is likely if boiler has been sitting for 3 years , whether it's been sitting full of water i don't know.

Why would i think you were being funny? no problem.

my understanding is that if a maker puts a control on a boiler that will prevent it from firing up if its condition has not be met is a safety feature and must not be bypassed.

Yes , i agree 100% , but.................these boilers use cast iron low water content heat exchangers , the safety factor being boiler thermostat along with overheat stat , many of these type boilers out there that don't use water flow switches for dry fire.............. i'm saying to bypass switch for fault finding only.

I've come across a lot of these boilers in my time , i suppose a few replacement switches is'nt to bad , i've seen a lot more bypassed though..................go service one of these & try tell the customer they need a replacement flow switch as the one on the boiler has been bypassed , very difficult if the boiler has been working fine for the customer to have any faith in you. .............rip off plumber comes to mind , can't win sometimes.

 

[Scotspark27]

Well ive now checked the air pressure switch and am getting continuity while under pressure test, Is the flow switch a normally closed or normally open contact? and it is a siemens pcb installed to.