Fan was running on high only so I replaced the block with a used one from the same year. It then ran on all 4 speeds for approx 10 mins then I hear a pop and it now runs on high only. Possibly the used block was faulty but I suspect a short somewhere. Anyone know how I can diagnose this? There was no dectable damage to the traces on the replacement block. I'm puzzled why the fuse does not protect this?
Thanks
Thanks