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Discussion Starter #1
Hi,

When climate control is used to warm the car, will it use the A/C or the engine heat?

Just made a test, and when I press the button to "A/C off", the car is heated normally..... but I am not sure what is used on auto mode.
 

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Will use engine heat (Coolant runs through the heater Matrix then into your nice warm cabin that is once the engine is getting to temperature)
 
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Discussion Starter #5
thanks to all ..... and will it harm to keep the A/C always on even before switching off the car? When the car will be started again will it do any harm?
 

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When using Auto mode the air con is automatically turned on.
The only time you can be sure the air con is off is when you see A/C OFF on the display.
There is no benefit in having the air con on when heating the car, but there is when using the demist function(air con on by default), and it is recommended to use the air con for at least 15 mins on a weekly basis to prevent a build up of bacteria in the system.
 

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Discussion Starter #9
When using Auto mode the air con is automatically turned on.
The only time you can be sure the air con is off is when you see A/C OFF on the display.
There is no benefit in having the air con on when heating the car, but there is when using the demist function(air con on by default), and it is recommended to use the air con for at least 15 mins on a weekly basis to prevent a build up of bacteria in the system.
thanks ron!

do you know of it is fine to leave it switched on before turning off the ignition?
 

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thanks ron!

do you know of it is fine to leave it switched on before turning off the ignition?
You can leave it on peranently, it makes no difference in stopping and atarting the engine. The fans will turn off automatically when the ignition is turned off.

The only drawback is that when the engine is not upto running temperature the a/c cools the air before it passes through the heater matrix, therefore it takes longer for the engine to warm up. Consequently the air from the heater is cooler for longer.
 

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Discussion Starter #11
You can leave it on peranently, it makes no difference in stopping and atarting the engine. The fans will turn off automatically when the ignition is turned off.

The only drawback is that when the engine is not upto running temperature the a/c cools the air before it passes through the heater matrix, therefore it takes longer for the engine to warm up. Consequently the air from the heater is cooler for longer.
and when turning on the engine will not make any harm to the a/c?

btw Happy Christmas to all!! :D
 

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and when turning on the engine will not make any harm to the a/c?

btw Happy Christmas to all!! :D
It shouldn't do any harm as it is designed to work this way. It will increase the load on the starter motor particularly important if the battery is in poor condition.

Happy Christmas to all
 

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You can leave it on peranently, it makes no difference in stopping and atarting the engine. The fans will turn off automatically when the ignition is turned off.

The only drawback is that when the engine is not upto running temperature the a/c cools the air before it passes through the heater matrix, therefore it takes longer for the engine to warm up. Consequently the air from the heater is cooler for longer.
On models with climate control, the system turns the AC of automatically during warm up thus preventing the evaporator cooling the air.
 
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