We were contacted by this customer because their pool heater had completely burnt up. Although it's not clear what caused this, after speaking to the customer, he suspected that his "Pool Guy" had tampered with it. He thinks he may have overridden something until he could get the right parts. This is never a good idea to keep a heater running. If you can't keep a heater running safely. The customer needs to understand that safety comes before their need for a heated pool for a couple of days. We removed what was left of this heater and installed a new one.