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HI Had a similar problem on my Potterton boiler, hot water going cold, then hot then cold............changed hot water thermistor.....no more problems. Don't know if this applies to yours as well, but somebody else might be able to shed some more light on the matter. JLD

Cheers dudes!! :lol:

Hi Due to a dead expansion vessel in my Lynx 2 combi i have purchased a 8 litre Boss expansion vessel and fitting kit. The fitting kit includes wall bracket, presure dial, filling loop and PRV. Due to there already been a working filling loop, prv and pressure dial included in the...

I would think the expansion vessel has lost its pressure. I have been told this is usually about 10 psi, not sure if this is standard for all boilers. You can recharge your vessel with a foot pump. You can also check if it is possibly leaking air by putting some leak detection fluid ( water...

Yes pressure goes up and prv drips. ANY IDEA WHAT PRESSURE THE VESSEL SHOULD BE SET AT? Cheers JD

Hi Potterton Lynx 2 losing pressure. My thoughts are: - a leak in the system - Pressure vessel not charged -possibly water passing through the filling loop and then increasing system pressure activating PRV. I realise filling...

Hi IN MY SECOND YEAR OF NVQ2, with only 1 years site experience.... varied work. Ive been asked to do a bathroom suite for a friend of a friend. Part of this entails moving the toilet. After looking at the soil pipe i thought the best course of action was to change the cast soil to a...

Hi S plan open vented system, been ok for years, but bedroom and bathroom radiator are now filling with air on a regular basis. Any comments why this is happening and possible solutions apprecited. JLD