A/C smells.
I had a new HVAC system installed 3 years ago. Going back between heat and AC this time of year. When I turn on the AC, it get this 'Dirty Sock" smell. I've used the spray "Dirty Sox", as the HVAC people use. It works. Just wondering if there was a more permanant solution? It's a new system, should not do this. It's a heat pump, Trane Seer 16 (Lxi I think). We replaced everything both outside and inside, except the duct work.
You need to check your filter system for by passes and proper cleaning. If you use a throw away filter its not trapping enough dust to help prevent this from happening.
What your smelling is mold development. Its important that the condensate drain system as ...»
As far as the duct work being at fault. The return side can be an issue if its leaking air that could be bypassing the filter system. Many homes have filters placed on walls or ceilings and quite often have many leaks that allow air to enter after the filter system itself. When this occurs the dusty air gets onto the damp wet coil when the AC is running then sticks to the fins. Once heat turns on this burns off and creates the odor.
The smell will not really hurt you, unless you have mold allergies or are sensitive to smells. But its a sign that your filter is not working quite as well as it should.
You can check for sure if your having a dust issue that may be collecting on the coil by simply opening up the fan compartment on the bottom of the furnace after turning off the safety switch. ...»
good luck charlie