Not had any noticeable issues with airflow, seems ok running on 1,2 but sometimes on full it just blows the fuse. I never have it on recirculating maybe i should try that. So probably wasted on the new resistor pack, put old one on ebay then is it easy to get to fan to check movement? I assume it is moving ok otherwise it would blow on low settings? Old resistor pack looked a bit corroded on the single resistor going across the pack at back. Any resistance settings to check? Maybe compare with new one see if they give same results.( will take it out again)