Yes, as long as it a gas system and not a electric heat pump system
The outdoor portion of the central ac unit is what gives up the heat from indoors, so it has to be outside. For a more thorough explanation see the question: How does air conditioning work.
yes.
A reverse cycle air conditioner work like normal air conditioners only in reverse, transferring heat into a house instead of outside of one. It is not an air conditioner at all, but a heater.
yes, however, if the ac does not work then you will be unable to blow cold air on a hot steamy windshield to defog it.
Install it backwards. This does not work in very cold climates.
Install it backwards. This does not work in very cold climates.
If your heat and air conditioner doesn't work on your 1989 Cadillac Eldo and you have install a new compressor, check the thermostat. The thermostat may be stuck close or has gone bad.
the filter on a central unit is the same as the furnace filter usually located in duct work directly beside furnace
Easy installation, takes up little space because it requires no duct work, they are affordable generally around 1,000 where central units cost 5 to 6,000 and many of them offer heat features.
Without heat from the sun the water cycle would not work .
Some people have allergies or other conditions which make it difficult for them to be healthy and comfortable unless they have help from something like an air conditioner or similar device. There are also some "air conditioners", like central air conditioners, that work as both air conditioners and heaters, so, perhaps, they are running it in "heat" mode. On the other hand, maybe they just like having the air conditioner on!
It seems as if there is a problem with the wiring between your speedometer and AC/heat unit. A licensed repairman can determine and fix the cause of this problem.