potterton profile 60e is popping reset button when hot water is running, its ok on heating as long as boiler is set on2/3 or less with water off. it ran all summer ok on hw only . system about 12 years old, have flushed system with sentinel x800,replace cyl stat and 3 port valve which let rads get hot during summer any ideas please
First thing to check is that the pump is being controlled by the boiler (pump overruns until boiler is cool), I've seen may systems not wired correctly that throw up this fault, especially as the boiler ages.
If it is wired correctly, you may want to look at replacing the three controlling stats.
Main stat
Pump overrun stat
Overheat stat (these tend to weaken after a number of operations and can pop out without too much reason).
The wiring is still the first thing to check however.
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