I think that they had at least one faulty machine. The 'full cycle' failed on only two machines, 'E' and 'G'; 'E' had an unusually low temperature of about 20

I think that they had at least one faulty machine. The 'full cycle' failed on only two machines, 'E' and 'G'; 'E' had an unusually low temperature of about 20c - so probably had a failed heater? (It was 9 years old) 'G' seems to have had the shortest hold time (about 5mins) - so again that might explain it; but why is it so short? Both E and G were Indesits; perhaps they need to build their machines to detect failures. Still, maybe a failed machine is still a valid test - how many hospital staffs machines are unknowingly faulty? A quick fix would be to swab staffs clean clothes every so often (or put a test patch in with their washes?) and check it.