Halstead Quattro, Overheat cutover device
- Thread starter Zehroni
- Start date
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No it isn't but when ANY SAFETY DEVICE OPERATES it is a sign that a Qualified Engineer is required to take a look and find out what is causing the problem, the potential causes are to many to list on here! 
Thanks for the reply, I forgot to mention that, first time it happened last two weeks was two weeks after I drained the system completely so I can treat it with system cleaner. And the second time one day after I drain the system again to inject the protector. In both cases I raised the pressure to 1.5 bar cold. Is that anything to do with it?
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