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Looks like handling the diverter valve is definetly not an easy task.I am seriously making note of the issues being discussed by learned people in this forum.Please post as much as you know on this issue. For the last few days I noticed there is a minute drop of water accumulating just at the...

Now looking at the messages, I can see diverter valve is inviting me to finger it( sorry finger-I mean in good sense). Just can you confirm should I look for the diaphram to be replaced or the complete valve? If its 20 quid.I will take a chance.

Thanks Tony, I can assure you all, I have attempted to install the APS only after the corgi guy uninstalled it in front of me.So putting the new one was not much of a task. Saftey was the priority and I attended this, when no one was at home and all mains gas, water, electrics turned off...

Hi ALL specially Tony, The latest update I thought to share with you all. Further to the APS i bought in the morning, I tried fitting it and could susceed to fire the burners after blowing air into the APS tube, but could not keep the fire to come up after the thermostat cutout. I have to...

Sorry, the previous thread is carried forward. Can somebody help me how to clean venturi for SD thelia 623? Thanks

Hi Tony Can you please guide me, where to look for venturi cleaning in the system.Or link me to literature if you can.Before I take a decision to change the boiler, I want to do this cleaning as advised. Thanks

Tony you are correct. Just to satisfy my self, I have been to nearest shop and got APS for £68 and replaced it. I am not sure whether I connected correctly. It has got two outlet to it to connect transparent pipes and 3 terminals 1,2,3 for electrics. Look like on the new APS,when all the...

So Tony do you suggest, the air pressure switch does not need to be replaced with a new one, but needs to be cleaned? Does that meen the corgi guy is coning me :evil:

oooopssss.....That was just a suggession he aired..

Hi All I have opted to call in Corgi reg engineer.He walked in looked just for a moment, pulled out the pipe leading to air flow switch, blocked the opening with his thumb, here it goes...the burners fires, and when the thumb is removed from the pipe opening, the fire at the burners is turned...

Sorry, But I have mentioned in my earlier reply the model number which is Saunied Duval Thelia 623. Apart from this should I see any more information on the boiler? The pump seems to be working, the fan spins well, but no gas flow to burners. Pilot is lit manually, which means no spark to...

raden-Thanks for the reply. Firstly first admit-I am totally new to Boilers. This odd hour necessity bought me here, hoping to get some help from learned people like you. The boiler was working fine previously. As, it was making noise since quite a long time ,I tried to bleed all...

Hi All I have a typical problem with my boiler. As the boiler was making noise, I flushed the system and put the pressure back to 2 bars.For quite a long time the pilot does not lit on its own then I manually lit the pilot. The system rolls water as usual, it makes usual gussling sound, but...