My C24 combi has worked perfectly until recently, but it now fires up at odd times when there is no call on it. Sometimes for 5 sec, sometimes up to 2 mins. The rads do not start to get hot, and so far as I am aware there is no pre-heat on the DHW side to have been accidentally switched on.
As I see there are three reasons why this is:
1. Flow temp thermistor sending figure below frost stat threshold (but it ain't that cold in my place!)
2. Timer on the blink (it's the incomprehensible digital one)
3. PCB on the blink
How would I prove which one is the culprit and is it easy to fix?
Could it be a minor leak inside which has dripped onto something?
Thanks in advance,
ATG
As I see there are three reasons why this is:
1. Flow temp thermistor sending figure below frost stat threshold (but it ain't that cold in my place!)
2. Timer on the blink (it's the incomprehensible digital one)
3. PCB on the blink
How would I prove which one is the culprit and is it easy to fix?
Could it be a minor leak inside which has dripped onto something?
Thanks in advance,
ATG