We defrosted our Bosch Intelligent Freezer 32 and when we can to switch it back on the alarm light flashes together with the -22 light. When I push the alarm button the alarm stops for a few seconds and then starts again. If I change the Temp setting from -22 to -18, when I press the alarm button the alarm stops for a few seconds and then restarts and sets the temp back to -22. Alarm keeps sounding and it does not get cold.