[Dave Swinson] I have a 3 way Dometic fridge (royale) model No. RM3663. It is 4 years old. this past year while it was running on gas (propane) it would go into check quite often. Sometimes it would stay on all day and sometimes it would stay on for only 15 minutes to 1 hour. The fridge runs fine on 120 volt and 12 volt. Any comments or suggestions would be helpful.