a) Furnace problem : no HEAT and no A/C...
b) Furnace sometimes fires up itself and then goes back to being idle
c) Gives off a humming sound (like it is ready to go) only, it aborts itself.
Steps taken :
1) Made sure thermostat is operational with fresh batteries and right setting.
2) Made sure filter is clean.
I will appreciate any input regarding this matter.
Thanks.
Larry C.