The heating direction doors can be stuck into a certain position. The heating direction door might be closed, not allowing warm air to come to the drivers side.
Your average A/C unit blows heat through all vents.
Do you have dual control thermostats?
If the unit works in the heat mode, then the problem is usually located in the outdoor unit.
ruud furnace only blows cold air, no heat
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
make sure both knobs are all the way up on red for heat...
See "Related Questions" below for a complete discussion on possible causes and more importantly: fixes
it could be your thermo stat
Its broken Are you a 5 year old or an unfunny comedian?
If you have a heat pump and the breaker blows in heat cycle then you probably also have auxiliary electric heat which is drawing too much current because of a faulty heater element.
An air conditioner blows out heat
convection