Climate Control – It’s not Rocket Science

Simple Mini heater controls

There are many things in life that wind me up, amongst them are drivers that don’t understand the Climate Control function in their car.
Early heating systems in cars were fairly rudimentary, water from the cooling system flowed through a matrix located near the front bulkhead controlled by a valve.  As this matrix got warm a fan would blow air through it, gathering heat, and then distribute it through the cabin utilising various outlets up to the screen and down to the footwell.  Variations in the valve and the fan speed would alter the temperature; after a fashion.  Journeys usually involved lots of fiddling and trial and error to get and maintain a satisfactory temperature.
Of course in the summer cars became unbearably hot and windows needed to be open to cool the vehicle down whilst moving.
Air conditioning was the answer and this was developed first in the USA in 1933, and then in 1939 Packard introduced the “Bishop and Babcock Weather Conditioner” which also incorporated a heater. Cars ordered with the new “Weather Conditioner” were shipped from Packard’s factory to the B&B factory where the conversion was performed. Once complete, the car was shipped to a local dealer where the customer would take delivery, with quite a large bill.  Air conditioning is now standard on almost all cars however lowly.

Climate Control is a smart form of air conditioning in that a desired temperature is set and then the system will work to maintain that temperature regardless of external weather conditions.

Merc Air Con
Typical modern Climate Control

This may be by increasing the fan speed, or the heat from the engine, or the amount of cooling from the compressor or a combination of all of them. Essentially, set the temperature (say 22° C) and LEAVE IT ALONE! A possible and rare exception may be to direct a little more air to the screen in the event of frost or condensation but otherwise LEAVE IT ALONE!

Being a passenger in a car driven by a Climate Control Denier is the most frustrating experience.
One driver of my acquaintance would start the journey with the whole system off, after a couple of miles the screen and side windows would steam up due to our breath. He would then turn on the fan at full blast, wind up the temperature knob and switch on the aircon, of course the screens would clear fairly quickly and then he would turn it all off again only to repeat the procedure several miles further on.
Many drivers seem to think that when the car is cold turning up the temperature knob to full will heat the car quicker, after a while it is now too warm so they reduce the setting to cool. Repeat.
Some get into a cold car, set the system to manual so that cold air is blowing across a cold heater matrix into an already cold footwell whereas an intelligent Climate Control would wait until there was some heat in the system.
Countless drivers seem to think that opening a window of a carefully streamlined and aerodynamic car will be more efficient than using ‘expensive’ air conditioning. It has been proved that you can use 30% more fuel simply by opening a window.

It’s really quite easy, set the desired temperature when you first purchase the vehicle then LEAVE IT ALONE!