"Any engineer or technician knows that when a device supposed to be OFF automatically, remains ON instead , the problem CANNOT be in the device itself, instead SURELY is in the switch or logic powering such device."
Yes, and after a few minutes this engineer decides to solve the problem by disabling the heater.
After more than 2 months and nearly 2500 posts it is very easy to say "the engineer should have known that the TOWS could be affected too" - but could he really?