Fixing your Automotive Air Conditioning unit in your car will most like require you to take it to an automotive shop, expecially if it possilbe need frezon sprayed into it/.
My guess would be, Ignition Control Unit.
As far as I am aware, CO is not a unit of measure.
"PSI" stands for "pounds per square inch," which is a unit of pressure commonly used in industries like automotive and manufacturing to measure the pressure of gases and liquids.
A unit can be a measure of length. It is one-dimensional. A squared unit can be a measure of area. It is two-dimensional. A cubic unit can be a measure of volume. It is three-dimensional.
This depends on what unit you are using to measure in. However, area will always be measure in (unit)^2.
division
The measure unit of a kilometer stick is kilometer.
The international (SI) unit of mass is the kilogram.
wattds
The unit of measure for work output is the joule (J).
Class room can be measure in Meters easily :)