Your compressor has possibly stopped working. If you are lucky, the serviceman will only have to replace the freon to get it going again.
the heat blows out the defrost when it should blow out floor vents only
Only if you have a heat pump system which is basically an air conditioner which can run in reverse, absorbing heat from outdoors and discharging it indoors via the refrigeration cycle.
Your A/C needs recharged.
You are low on coolant to the heater core.
Because something is wrong with it. When it is off it does`nt blow anything, that `s why you only notice it when it is on.
Your air conditioning unit might need recharged with freon. If there is not enough freon in the system the system will not cool the air in the heat of the day but when the outside temperature drops in the evening it might be easier to cool.
Could it be because an air conditioner is not designed to produce heat?
You have a vacuum source at the intake manifold that is possibly disconnected.
There are several causes that an air conditioner is only blowing cold air for a short period of time then only blow hot air and then not going back to cold. This is especially common in the hotter weather including in the 90s and above. It could be from the air conditioner freezing over. You can fix this by simple trouble shooting and if that doesn't work call a repair man.
No, the compressor only draws out the heat from air. The blower motor either blows warm air or cold air.
check the free on in the compressor and if that's not it you will need a new compressor
A humidifer can only add water to the air in a room. An air conditioner can do a lot more than that, it can: * chill or cool the air * remove water (de-humidify) the air * add water (humidify) the air.