I'm going to give the ol' shotgun approach here.. Make sure that you bleed the air out of the propane lines.. Turn your stove on until it lights to be sure. You might not have had any gas to your heater after changing the tanks out. Also make sure and turn your thermostat off before replacing the fuse. Once that is all taken care of replace the fuse, turn the thermostat back on and hopefully it is working again..
2013 Jayco Jayflight Swift 264BH
2002 Yukon 5.3L Vortex w/tow package
When I die, I want to go peacefully like my grandfather did–in his sleep. Not yelling and screaming like the passengers in his car.