The pic below shows a stat of some sort fitted to the flow pipe from my boiler. The electrical flex goes to a junction box where boiler controls enter/exit from boilers and various room or hot water stats. The system was fitted 20+ years ago. I've never been sure what the purposes of this stat is but guy who just did boiler service says it is a frost stat because the boiler and pipework is installed in a garage. However, does that make sense given the temperature setting of 80 deg. (I can't guarantee this is how it was originally set)?
Any comments welcome.
Any comments welcome.