Waited too long for installation, now I can't return the second Dometic RV analogue thermostat. Obviously these things have an expiration date and I can't get a replacement that works. Both the original order and the replacement failed. The oven is always on, regardless of the settings: SYSTEM, shutdown, or oven settings, regardless of the temperature controller setting. Now I start the oven manually by connecting and disconnecting the blue thermostat wires to the oven. This is how these…