I have a 10 year old house. The furnace died on us last March and
we've just replaced it two weeks ago; we kept the old air conditioner
and coils. I have been noticing that increasingly the air conditioner
is now producing a musty and damp smell coming from the vents. It's
been progressively getting worst every day and I can't determine the
source of the problem. We've lived in the house for years and it
always smelled fresh and dry and now after spending $4000 on a new
furnace I find myself with this problem.
The person who installed the furnace said that he set the
dehumidification to max by letting the AC start for a while before the
fan would start.. so the coils would condense some moisture before the
fan kicks in. The problem is that since the unit was installed, the
house became very damp – I've noticed wet paper towels stay wet for
hours, unlike what we were used to before we put the new unit.
Can someone provide some insight into what's causing this?