My Frigidaire gas oven has begun to act up. Occasionally I get this continuous beeping noise and the display shows F30 and the oven shuts off. I wait a while and reset the temp, sometimes it works fine other times I just get the F30 warning again. Along with this the oven seems very cool. I bought an oven thermometer and it is running a good 50 plus degrees below the set temp. When I put the temp up to compensate it stays low for a while and then it runs the temp up way above where I set it. It was converted when I got it about 2 1/2 years ago from natural gas to propane and it seemed to work fine until the last couple months. I did read my manual and I did the procedure to adjust the temp from the factory setting and I am to the max of +35 degrees and it seems to make no difference. I read on the internet that the F30 warning might mean a module is bad. Is that something I could replace myself and do you think that is the problem? Thanks for the help.