LP is a LIQUID in the tank. The temp will NOT cause a Liquid in a sealed vessel to go down or up. Temp will only cause the amount of PRESSURE to increase or decrease inside the vessel, but the liquid will stay static. There are NO floats inside an LP tank, so the Liquid will flow like waves if the vehicle is moving and this will cause the float to go up and down and the reading on the LP monitor will go up and down. OLD Georgia Boy motorhomes used to have a constant round gauge that was on all the time and when driving the needle would fluctuate widely from the LP moving in the tank. Drove some RV'ers nuts. Doug