My boiler fires up and closes down every 15 seconds or so.
I noticed that the thermostat which reads the water temperature in the system and instructs the boiler to open or close is installed on the FLOW pipe from the boiler so is only a foot or so from the heat exchanger - Surely it must register increased temperature almost immediately after the boiler fires and then immediately instruct the boiler to close down? Within a few seconds, more cool water will have passed through the boiler and into the thermostat, prompting a further instruction to the boiler to fire up again.
A thermostat on the RETURN pipe however, would not register temperature increase until most of the water in the system has been heated - isn't this how it's supposed to work? Was my thermostat installed in the wrong location or don't I understand how it works?[/b]