We are getting the error code E124 on our upper range of our dual Thermador oven. To clear, we reset the oven at the breaker. The Oven will then work fine for a few days but then hit the error again We do leave our oven door open sometimes after cooking to allow the heat from the oven to help heat up the house(we live at 6500 ft in California mountains). Our oven is 1 1/2 years old, so out of warranty. Any suggestions?