Smell from vents in afternoon
#1
07-12-20, 03:24 AM
Smell from vents in afternoon
Starting on July 4, we have had very hot and humid days. Since then, we’ve had a smell coming from our upstairs vents that begin in late afternoon and go through the evening-but it seems to only be on very sunny/hot days. We checked out the filter on the unit In the attic and it’s fine. We had an AC inspection and cleaning. They came in the morning so they didn’t smell it and it still restiveness after they cleaned. The unit itself is only a couple years old, but the house was built in 1974. We don’t have this smell coming from the downstairs unit’s vents, which is actually older. We moved in last year. Any ideas on what this could be, or any suggestions on next steps?
#2
07-12-20, 11:46 AM
Group Moderator
Welcome to the forums.
An extremely hard problem to diagnose without being there.
Is this just a split A/C system or is it a heat pump system ?
An extremely hard problem to diagnose without being there.
Is this just a split A/C system or is it a heat pump system ?
#3
07-12-20, 01:42 PM
Do you have 2 AC systems, one for downstair, one for upstair ? or only one AC ? You also said downstair vent is older, is up stair vent/duct newly installed ? We'll need more details in order to help you.
#4
07-12-20, 07:41 PM
Thanks for your replies! We have two units. The one in the basement, which cools the basement/first floor is older but there’s no odor. The other unit, which cools the 2nd floor, is located in the attic. The vents to the bedrooms from that unit have the odor coming out in the afternoon/evening. Surprisingly, the two bathrooms on the same floor do not have the smell coming from those vents. Could it be an issue with the ductwork leading to those particular vents?
#5
07-12-20, 08:01 PM
Group Moderator
Could it be an issue with the ductwork leading to those particular vents?
Is this just a split A/C system or is it a heat pump system ?
At this point, I am not sure where the problem is. Perhaps the AC disconnect is faulty and/or the wires between the panel breaker and the AC disconnect are damaged. Or perhaps the voltages between Line 1 and Line 2 are in phase so that I measured 0 VAC. Please let me know what you think. Thanks in advance!