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Can anyone recommend any breakdown cours(es) that could help me pick up some new stuff/tips etc? I have been doing installs for years and want to move into the breakdown sides as my legs and back is not very good! :cry: I have done some breakdowns, faults such as fans, aps, expansion...

Thanks for your help I appreciate it a lot. Here's another one for you experienced breakdown guys: what are the most common thermistor faults you find - I have had hot water from a combi running cold, hot water running hot then cold etc and temperatures getting so hot and staying too hot

thankls for your help what's the best way to test/check a thermistor when hot? Any good ways in your opinions?

What is the best way in your opinions to test them? I test them with resistance, with power off and lead(s) removed - and look for a stable reading (when cold) within calibration range as per chart - is there a better way to test for a faulty thermistor?