Tap full on for Hot water Potterton Performa 28

[lewmal]

Hello, could someone possibly advise me on a hot water problem with my Potterton Performa 28 combi boiler.

I have to turn a tap full on before the hot water will fire up. Once it it fired up it is then possible to reduce the tap flow. (central heating not on)

Looking at the diverter valve, the little piston only pops out a short distance if the initial tap flow is less than full on, thus the micro switch does not operate. If the tap is turned full on then the piston extends fully and operates the micro switch and all is well even if subsequently the tap flow is now reduced.

Does anyone know the cause of this problem???


Many thanks

 

[Puddle]

What you need is one of these


POTTERTON 5111137 DIAPHRAGM SERVICE KIT :: Potterton Boiler Spares :: Boiler Spares

 

[stevetheplumber]

What you need is one of these


POTTERTON 5111137 DIAPHRAGM SERVICE KIT*::*Potterton Boiler Spares*::*Boiler Spares

ive always found you get nothing if the diaphrams gone so probably best to change complete threeway valve

 

[lewmal]

What you need is one of these


POTTERTON 5111137 DIAPHRAGM SERVICE KIT*::*Potterton Boiler Spares*::*Boiler Spares

Many thanks will order one of these

ive always found you get nothing if the diaphrams gone so probably best to change complete threeway valve

Many thanks for your input, but I will try the service kit first

 

[lewmal]

DIAPHRAGM SERVICE KIT now fitted and all is working correctly