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Advice please.
I drained my open system to add x800 a couple of weeks ago and all ran smoothly. Last night I drained it all out, cleaned the tank and added inhibiter but when I have filled the system add bled all the radiators, the boiler won’t stay on.
All radiators are full, no more air coming out when bled. The pump is a grundfos ups3 and as far as I can see it is self venting as no bleed screw on there.
Have I created an airlock else where?
The boiler fires for a minute then shuts down and keeps repeating every 5 minutes or so.
I’m happy to get a plumber out but I don’t understand why everything worked fine last time I drained but now it hasn’t worked.
Cheers
I drained my open system to add x800 a couple of weeks ago and all ran smoothly. Last night I drained it all out, cleaned the tank and added inhibiter but when I have filled the system add bled all the radiators, the boiler won’t stay on.
All radiators are full, no more air coming out when bled. The pump is a grundfos ups3 and as far as I can see it is self venting as no bleed screw on there.
Have I created an airlock else where?
The boiler fires for a minute then shuts down and keeps repeating every 5 minutes or so.
I’m happy to get a plumber out but I don’t understand why everything worked fine last time I drained but now it hasn’t worked.
Cheers