Hello, I am looking for some advice. In our house, we experience a very strong burning smell (like burning wires). Now, this smell mainly occurs on hot, humid days from mid May through September. The smell only happens between 8:30 pm to 10 pm. We first notice this smell on the 2nd floor, then in the two areas of the house where the ceiling is open to the 2nd floor. The smell will stay pretty much confined to just the hallway area, and not go into the 2nd floor rooms. The smell will last about 15 to 20 minutes, then leave. The smell tends to happen a couple of days in a row, then we will not notice it for about a week or two. This is going on the third summer of noticing this smell.

We have had two different HVAC companies out to look at this. The first company replaced the motor in the upstairs unit (we have two units, one in the basement and one in the attic). Although, the motor did not look that bad, plus the smell came right back in about a week. The second company inspected both units and again found nothing wrong with either units (no smell inside or any sign of burn marks) nor wiring to the units. We had the recessed lights checked on the second floor and nothing was found wrong. We do change the filters regularly and will still notice this smell after one is changed.

Unfortunately, none of the companies were here to experience the smell. Since the smell only lasts about 15 to 20 minutes, it would almost be pointless to call someone to come check it out.

So, any advice or pointers. We would love to hear them since we are going nuts thinking what could be a possibility

Thanks for the help