Folks,
Moved to new property about two years ago, where we have Worcester Highflow 400 Electronic RSF (originally installed ~2002) and looks there are some issues and was wondering if any experts around and able to check in Aberdeen/Aberdeenshire area.
Here's what's happening...
* Started having intermittent hot water being cold since about 1 month (usually first thing morning cold shower and randomly) and later on the day would get normal or few times sorted by re-set through CH/HW dials but don't know what was actually triggering system/HW failed and back to normal and no usual indication on LEDs.
* But wouldn't get HW started in this morning...
* When tried switching on CH - looked ok and heated up radiators fine.
* Notice when HW is running (when it works) - CH out pipe at back of the boiler heats up too (radiator doesn't get hot though)..when CH/HW is off, after 15min/30min that CH out back to normal/no hot... that sounds odd, may be something to do with diverter valve??
* Checked few things and notice pressure gauge was reading zero, and low pressure, re-fill through the loop, switched on CH for some time etc. This did not sort the HW problem ... so tried to reset through temp dial controller, and seems that made HW running fine (but still CH pipe back at boiler gets hot).
* Checked the schrader valve and notice water coming out. So as suspected diaphragm in expansion vessel perished and that's where pressure may be was lost initially. So surely needs expansion vessel replaced...
* but same time wondered switching CH did not trigger relief valve or pressure remained ~1.5 bar (at cold ~1 bar)...so checked all radiators and notice some were bit cold at top so think there is plenty air in the system and may be that's why relief valve was ok and instead radiator air may be compressed.
* Noticing some of the radiators are cold at the bottom...doesn't affect much to worm up the house but know something isn't right.
Appreciate any help or if any folks have seen any similar symptoms?
Cheers.
Moved to new property about two years ago, where we have Worcester Highflow 400 Electronic RSF (originally installed ~2002) and looks there are some issues and was wondering if any experts around and able to check in Aberdeen/Aberdeenshire area.
Here's what's happening...
* Started having intermittent hot water being cold since about 1 month (usually first thing morning cold shower and randomly) and later on the day would get normal or few times sorted by re-set through CH/HW dials but don't know what was actually triggering system/HW failed and back to normal and no usual indication on LEDs.
* But wouldn't get HW started in this morning...
* When tried switching on CH - looked ok and heated up radiators fine.
* Notice when HW is running (when it works) - CH out pipe at back of the boiler heats up too (radiator doesn't get hot though)..when CH/HW is off, after 15min/30min that CH out back to normal/no hot... that sounds odd, may be something to do with diverter valve??
* Checked few things and notice pressure gauge was reading zero, and low pressure, re-fill through the loop, switched on CH for some time etc. This did not sort the HW problem ... so tried to reset through temp dial controller, and seems that made HW running fine (but still CH pipe back at boiler gets hot).
* Checked the schrader valve and notice water coming out. So as suspected diaphragm in expansion vessel perished and that's where pressure may be was lost initially. So surely needs expansion vessel replaced...
* but same time wondered switching CH did not trigger relief valve or pressure remained ~1.5 bar (at cold ~1 bar)...so checked all radiators and notice some were bit cold at top so think there is plenty air in the system and may be that's why relief valve was ok and instead radiator air may be compressed.
* Noticing some of the radiators are cold at the bottom...doesn't affect much to worm up the house but know something isn't right.
Appreciate any help or if any folks have seen any similar symptoms?
Cheers.
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