Hi,
A technician came by to fix my heat yesterday. All of sudden there was smoke coming up the vents. I don't know what he did but the heat came on and the a/c worked too. Then last night
There was no heat air through the vent. This morning I turn
On the a/c and there is no cool air through the vent.
The fan and compressor work from the outside unit.
What could be the problem?
Thanks,
Megan