Your thermostat or condenser is wired wrong on the control side. Usually there is a terminal inside your furnace that has the same connection colors (Y, W, R, G, C) as your thermostat. It should be connected color to color to the thermostat with the 2 wires from the condenser wired to Y and C.
Generally allow one day for replacing a furnace and one day for replacing an air conditioner. You need to replace furnace and air conditioner at the same time.
it's the same as the furnace filter. the air conditioner runs through the furnace to push he cold air. change your furnace filter and you are changing the air filter on the air conditioner
the filter on a central unit is the same as the furnace filter usually located in duct work directly beside furnace
It may or may not be more cost efficient to buy a furnace and air conditioner at the same time. It depends on what kind of setup you have and what kind of setup you want. Will they be using the same parts or the same duct work. Do you need a new furnace? Do you need a new air conditioner? If you need one will you be needing the other soon? Are you going to need to make changes for both? If you need both and both use the same duct work, the answer is yes. If both will need updated electrical and plumbing, the answer is yes. If you are going to need to pay a double delivery charge if you get the two delivered separately, the answer is yes. Otherwise, the answer is no.
No, but your furnace still does
Usually a 3 ton - 70,000btu furnace.
The furnace or air handling unit in the house.
yes.
Air conditioner. One heats the interior of the house; the other cools it.
dead mouse inside the furnace
There are 2 coils. 1 inside the indoor air handler or furnace and 1 outside on your condenser in the yard.
Check your furnace fan. The air conditioner unit can be running but the air circulation is usually done with the fan on the furnace. If you have a fan switch on the thermostat, check to see if it is in the auto position. If it has the settings on/auto/off, you can switch it to the on position and see if you get any air movement then. If not, you could have a broken belt.