SOURCE: bad smell from ac unit in my house
does it smell like literally , dirty socks?if so it is dirty sock syndrome, a plague of heat pumps for years. if it smells like an electrical melting or burning of wires then time to call a pro.it could be a weak capacitor or a weak fan motor. if it is dirty sock syndrome then its the microbes that thrive when temps are middle temps and reproduce when temps are hot and cold in intermittent days. hot one day and cold the next equals call for cool then call for heat and hot steam from heated coils cause s bacteria to grow and microbes to spread across coil. when you switch back it causes the smell.if the coil is clean you can spend a chunk of money on sanitizers but best bet is to run it cool for hot weather and hot for cool weather. the transitional periods are what create the smell. avoid semi cool and semi hot periods. this condition is common to acs from all brands . lots of stuff on the internet about dirty sock syndrome
TAKE OUT YTHE A/C CLEAN THEN REINSTALL IT ALSO CLOSE THE FRESH AIR PORT
SOURCE: 3 ton goodman heat pump package unit, odor coming from vents
I ran upon this a few years agoafter 20+ years in the industry it is actually called "DIRTY SOCK". In the winter the drain pan and trap dry out and all the junk left behind when the summer rolls around mix with the condensateand cause the odor. "Home owner fix" pour a cup of bleach down the drain and in the pan let sit for about an hour then pour a gallon of hot water, that usually takes care of it.
SOURCE: It smells like fish...
Spray foaming style bathroom cleaner on both evaporator and condenser coils, then rinse off.
SOURCE: I have a 10-year old
If the induction motor ain't going I would look for a blown 3 amp (purple) fuse on the control board. If that was good I would check if any of the roll out switches were tripped. If a rollout switch was tripped check or air restrictions somewhere.
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