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Premium Feather Member
It's actually a simple answer I learned a few decades back. It truly is dust build up. The math is rather simple and unforgiving. Size and Merv rating of the filter plus how often you change it times how often you inspect/clean the air handler of the HVAC system equals the likely hood of the coils having to burn off that build up dust.Okay so now I have a question... lived down here now just over 19 years. This is the first time turning on the heat has ever set off any smoke detector. Why the heck did that happen this year? Lmao Did raising chicks inside (twice) for 8 weeks contribute to today's shenanigans with the smoke detector? LoL
This spring I had to de-ice and spray clean the AC condenser coils of the air handler, while at it I removed the fan and took it to the driveway and wirebrushed every blade of that squirrel cage assembly and the entire inside ducting of the fan itself. Then I Lysol wipes the entire inside surfaces of the air handler as mold has started to show up in small spots....
It's very easy and the youtube demo's by the actual repair companies are nearly all 100% accurate and true. There is a little bit of poe-tahy-tow vs. puh-tay-toe if you get the drift.