Hi I'm having a problem with my Dometic RMDT 8505 fridge freezer. Last week we travelled to campsite 1 - no problems Fridge/Freezer switched to 12v whilst travelling, on site plugged in to 240v again no problems. We moved to site 2 and the fridge/freezer worked whilst travelling again but once on site and plugged in to the mains, overnight we noticed the fridge and freezer had stopped cooling. I tried unplugging the mains, switching off, etc but the unit failed to cool. The motorhome was sited level. I switched to gas & the freezer section cooled overnight but the fridge failed to cool. This continued for 2 days, freezer froze but the fridge only seems to cool a small amount even after increasing the thermostat levels to five lights. Returning home and the unit switched to 12v again and both the freezer maintained frozen and the fridge did cool things done at an increased level. On returning home I have switched the unit off waited 24hrs and doors open, fridge is at ambient temperature Switched back on again mains voltage - 24 hrs later freezer frozen & fridge very cool temp setting on 4 led’s Switched off waited 24hrs and doors open, fridge is at ambient temperature. Repeated these steps switching from mains to gas every 48 hours and all ok until this weekend. The unit was on elec and Sun morning I have a HE1 error code. This is Heating Element number 1 but I have 265ohms & mains voltage when testing? any thoughts??