Thanks Hotfly. Yes I did think about switching the back-up immersion heater on to try that out - if that worked that would confirm the blender was ok I presume.
Anyway, an update. The client rang this morning to say everything was now fine. So this is with a surface mounted clamp on cylinder stat clamped onto the tank and set at 65 degree C.
I have read that these stats are not recommended but I'm not sure why, its clamped directly onto the copper tank so it seems like it should be ok to me. But I am a sparks to a heating expert so I might be missing something relevant to the safety of the system?
I can only assume that the probed type replacement stat that I fitted was not calibrated properly. I'm going to hook up a continuity tester across it and put the probe in a container of water and see if it switches at say 70 degree, then at 80 degrees, etc. I will have to use a thermometer to measure what's going on. If it is faulty I can try a different one - I am just a bit concerned that I have fitted a stat type that is described as not suitable.
Anyway, an update. The client rang this morning to say everything was now fine. So this is with a surface mounted clamp on cylinder stat clamped onto the tank and set at 65 degree C.
I have read that these stats are not recommended but I'm not sure why, its clamped directly onto the copper tank so it seems like it should be ok to me. But I am a sparks to a heating expert so I might be missing something relevant to the safety of the system?
I can only assume that the probed type replacement stat that I fitted was not calibrated properly. I'm going to hook up a continuity tester across it and put the probe in a container of water and see if it switches at say 70 degree, then at 80 degrees, etc. I will have to use a thermometer to measure what's going on. If it is faulty I can try a different one - I am just a bit concerned that I have fitted a stat type that is described as not suitable.
