Hey pullo there are far more others versed on this site about Thomas pumps than me. Lets wait and see what someone else may have to say? Sounds like your not getting enough juice to it if you can turn the fan by hand and then it starts to work??? Lets see if someone else will chime in and be able to help you.

The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!