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how do i do that

any one else got any other ideas

thanks

how do i test it

Yeah thats what i thought gonna replace the sensor if its that

Today i fitted a pcb and an diverter vavle to a optimax he 38 c when i come to switch it on and fire it up f37 is on the display. f37 is system pressure to low but it was at 1.5 bar any suggestions anyone

yes i checked heat exchanger there are no leaks anywhere

if the air vent mesures up to be of adequate size it doesnt matter,because as its situated behind a radiator is classed as not to current standards regardless of whether it hasnt been a problem for however may years.

superduper do you meen unscrew the combustion chamber or where the venturi is housed

superduper do you mean unscrew the combustion chamber or the area the venturi is located

no superdupergasman i have checked all rads and all pipework and the tennant has said she hasnt seen any wet patches its a ground floor flat with concrete floor so all pipework is exposed

Hi superdupergasman.I was being drawn to the venturi problem after viewing this site i will try tomorrow as i have to go back with a PCB to try.The flowmatic thats losing pressure,there are no visible signs of any leaks any where thw propertys belong to Anchor Housing so i know they can afford...

Hi DP having scoured this site a few times to fine tune my fault finding skills i get the impresion you know a thing or two.But i am new to this site so tell me please what is combustion chamber

Im a gas engineer and would like some advice.i was called to a couple of flowmatics with problems.The first one is when you try the HW it will come on but then try it again and it wont it seems to come on when it feels like.The pins on both manifolds come out enough to press the microswitch.The...