R
rambo
Hope you can help guys and gals.
I have an open vented central heating system. Potterton prima 100 boiler, large pump pushing hot water round 3 channels: (1) Hot water, (2) upstairs rads (10 including 1 bypass) and (3) downstairs UFH via a manifold. The upstairs rads are controlled via thermostat and the UFH manifold (which contains an internal pump) will switch on and off in response to separate thermostats. The rad system was flushed prior to the UFH being installed.
The boiler starting cutting out recently (initially every other week and then almost daily) requiring me to push the reset buttin to restart it (after realising I had no hot water to shower with).
I have BG cover and they replaced the Boiler stat and OH stat recently. I got through 2 weeks trouble free and now it is cutting out daily again. BG came out again and could not find any noticeable blockage within system or air in pump etc but did notice that f&e tank in loft was very hot. They have concluded that system is pumping out so there must be an unidentified blockage somewhere. Therefore the system needs another (in their view proper) flush (and that the bypass piping was old and narrow and not helping things). They were however unable to find a blockage. They have turned the boiler down from near max and reduced the pump speed and recommened a flush or replacing the old boiler.
I am not convinced by the diagnosis and wanted your expert opinions.
I have an open vented central heating system. Potterton prima 100 boiler, large pump pushing hot water round 3 channels: (1) Hot water, (2) upstairs rads (10 including 1 bypass) and (3) downstairs UFH via a manifold. The upstairs rads are controlled via thermostat and the UFH manifold (which contains an internal pump) will switch on and off in response to separate thermostats. The rad system was flushed prior to the UFH being installed.
The boiler starting cutting out recently (initially every other week and then almost daily) requiring me to push the reset buttin to restart it (after realising I had no hot water to shower with).
I have BG cover and they replaced the Boiler stat and OH stat recently. I got through 2 weeks trouble free and now it is cutting out daily again. BG came out again and could not find any noticeable blockage within system or air in pump etc but did notice that f&e tank in loft was very hot. They have concluded that system is pumping out so there must be an unidentified blockage somewhere. Therefore the system needs another (in their view proper) flush (and that the bypass piping was old and narrow and not helping things). They were however unable to find a blockage. They have turned the boiler down from near max and reduced the pump speed and recommened a flush or replacing the old boiler.
I am not convinced by the diagnosis and wanted your expert opinions.
