Hello,
we live in a 2-story home that was built about 7 years
ago. We moved in about a year and half ago.

The electric heater seemed to work well until
now. For some reason, it doesn't seem to blow
warm air through the vents. The temps are set
to 70F. The first floor stays very cold.

The attic has 2 units, one for A/C and one
for heater. The filters were changed 2 months ago.

Can anyone advice on possible causes
of electric heater not blowing warm air thru
vents?

Thanks for any advice.