I don't have a manual and I don't know how to set the thermostat. The people that I bought the place from have moved to Thailand. If I place it on Heat or Cool, it stays on all the time. It never shuts off, so I have to keep turning it off when it runs too long. I have to go out of town next week and I don't know what to do. I don't want it to run all the time while I'm gone. Please help!!!!!