KT has a bit of experience with cabin air filters and their fans from the olde Royal Coach. It set outside under a smallish oak tree in its regular parking spot over the years. Two years ago while having the oil changed the shop tip recommended a cabin air filter change, and with KT’s Royal Approval, they did. When His Majesty got ready to leave, He turned on the heater fan and you never heard such a clatter! KT pointed it out to the shop manager, and he stated it sounded like some acorns on the fan blades! His Majesty talked to the workman who changed the filter and he said it was full of small acorns and pieces of acorns and twigs. He gave KT instructions on how to drop the fan and clean out that mess. His Majesty arrived back at the Castle and took out the 3 screws at the bottom of the unit, as recommended. Out dropped the fan and about 2 handfuls of ground up nuts and twigs!
KT disconnected the wiring plug and blew out the fan cage with the Royal Air Compressor! The He vacuumed up all the mess from the cab and began the very awkward reinstallation of the unit, practically having to stand on the Royal Noggin. KT still could not see the exact location of the 3 holes that the bolts screwed into, so he blocked the fan up into position, and fumbled around until He got one screw threaded in! Then He was able to get a second and finally the third screw threaded in and tightened up. Turned on the fan and it was whisper quiet!
KT is of the opinion that much of the channel above the filter was blocked up with that mess and when the fellow pulled out the old filter, it all dropped down into the fan! Moral of the story….do NOT park under an oak tree on a regular basis.
From this dirty filter, it appears that the previous owner had an older brown and grey haired dog with a short coat and a shedding problem!