1. I'm using the "faithful 32x32" resource pack, which makes the Thermal Washer GUI look broken. I think that this is due to the fact that in the file \assets\advanced_machines\guidef\thermal_washer.xml the value is hardcoded to use the texture

<image x="80" y="33" u="80" v="33" width="43" height="28" src="ic2:textures/gui/GUIOreWashingPlant.png"/>

To check this issue, just download this resource pack. I deliberately removed everything superfluous, leaving only the problematic texture
Download: ic2.zip

2. Thermal Washer and Water-Jet Cutter does not support the Fluid Pulling Upgrade, although it is very important to fill the fluid for the operation of the machines.