How did you do the fuse bypass? piggiback from F7 to the blower's plug or how
Try to set the blower to maximum speed and see then, if it's not intermittent on max speed only on all the others then the problem is with the power transistor or it's circuit, to rule out other circuit issue make somehow to hook two wires to the blower's plug pins(C0056) bring them on the dash and let a voltmeter connected to them while the symptom occurs, white/red wire is (+)... if there is voltage while the blower doesnt work the problem is with the motor, if the voltage is missing too you'll have to see what's missing so let positive voltmeter probe hooked to the WR wire, connect the other to earth somewhere and see then and report the results and we'll speak again cos this troubeshooting must go step by step and it's hard to cover all the possibilities from the beginning
My friends call me Fery
2000 Discovery Td5 ES manual
Hawkeye v.6, Nanocom EVO,
VDM UCANDAS, oscilloscope
if you think my english is peculiar it means you didnt hear my japanese
ALL MY ADVICES ARE BASED ON MY OWN KNOWLEDGE AND MY WAY OF UNDERSTANDING THE DESCRIPTION AND OPERATION OF SYSTEMS... I'M NOT A LAND ROVER TRAINED SPECIALIST JUST AN ADDICTED ENTHUSIAST.