There are 2 sensors. The Remote display error is the INTERNAL sensor of the Inverter and NOT the battery charge temp sensor. I thought he was talking about the Battery temp sensor until I read his post again and he posted what the remote display stated. O temp is the Inverter internal temp problem. IF he has 120 connected to the RV, the Inverter/Charger is indeed powered up. The Charge section is always ON unless you manually turn it off. The odds are, if he removes the metal cover of the Inverter he will see 10 years of dust and dirt build up inside on the electronics and transformers. He needs to check that and then blow/clean out the debris and probably replace the cooling fan as it is probably not working to spec. Doug
