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can you tell what a full service is on a combi boiler other than cleaning it out with a vac

could this not be a thermisor problem

if i turn down the boiler stat and it does not modulate does this mean my mod valve is brke

yes but how would i test if it is modulating or not

i do i get no ch

how do i fix it lol

yes but why is it not modulating what causes these problems

baxi bermuda it fires up for 10 secs then goes off it stays off for 20 mins and fires back up again but only for a min are so hw ok

has the piping been cliped correctly

whats not working

when you say the temp you want the boiler to run at what inturn do you mean by the temp of the boiler to run is the temp of the water in the heat exchanger

so if the flame picture stayed the same if i turned down the boiler stat what would this indicate

whats the difference between the bioler stat and the overheat stat

what is the best way to test the modulating valve is working ok