Many thanks Dave, and to all who have responded! 
Pump runs continuously (no CH/HW call; boiler switched off)
- Thread starter ripe
- Start date
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Hi again,
Q1: Is the thermistor mentioned below (Potterton Performa 28i - system was "humming" at 4am) the same thing as the "thermostatic sensor" of my Baxi Solo 3 PF?
Q2: And is it also the same thing as its "integral frost-stat"?
Q1: Is the thermistor mentioned below (Potterton Performa 28i - system was "humming" at 4am) the same thing as the "thermostatic sensor" of my Baxi Solo 3 PF?
Q2: And is it also the same thing as its "integral frost-stat"?
gazthepottertonengineer said:its normal for it to take upto 5 mins as this is the anti cycle on the boiler working but if its much more than that then its more than likely to be pcb
This is exactly what the problem was. This switching problem only occured when the boiler was in pre-heat mode. Two thermisors were replaced, which required a small amount of draining-off water from the boiler as one of the thermisors was on a pipe containing water.
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