Range Rover P38 air con

Here's a poser for all you RR techies: The air con on my '99 Vogue blows cool(ish) air to the passenger side, but hot air to drivers side. However, go round a sharpish right hand bend and it sends a blast of cold air to the drivers side - but not for long.
The system was re-gassed a little while ago (less than a year).
Any suggestions - anybody?

New blend motor? Mine did that last year. Cold on parssenger side, warm on driver side. Get them "read" and you'll possibly need to replace where not working. It can be expensive to do, but if you like your air con. then you'll do it. Be careful if buying used/second hand ones. Why would they be for sale if still working?!

the blast of cool air hitting you when you go around a corner might have more to do with inertia than airconditioning.

Isaac Newton's Laws of Motion: Science Channel

rasheed said:

the blast of cool air hitting you when you go around a corner might have more to do with inertia than airconditioning.

Isaac Newton's Laws of Motion: Science Channel

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We know that cold air is heavier than hot air Rash but i hardly think it's going to swish about on a corner. Maybe a detached distribution flap would.

Would normally defer to you Tony but in this case it has nothing to do with the density of the air. It has to do with vector and trajectory. Relative to the car, the cold air is supposed to blow (roughly) straight down the cabin. However once the air leaves the vent it is now travelling on its given trajectory and as you rotate the the car and change its trajectory that "packet" of air current that was aiming for the rear windscreen now finds itself aiming at say one of the b pillars. I've experienced this many many times and its quite a predictible phenomenon. Remember the old O'level physics question back in school - two boys on a train, standing across from each other on either side of the carriage throw a ball back and forth. To someone in the carriage with them,the ball appears to travel in straight line between the boys. But if you tracked the path of the ball against the earth and you made the boys and the train dissapear, you would see the ball is travelling in a zig-zag fashion..etc etc.

(do agree though that in fentigerover's case it probably is something flapping around inside that opens the airway to the driver's vent when he goes around a corner and flops shut again when he's going straight!)

300AJC said:

New blend motor? Mine did that last year. Cold on parssenger side, warm on driver side. Get them "read" and you'll possibly need to replace where not working. It can be expensive to do, but if you like your air con. then you'll do it. Be careful if buying used/second hand ones. Why would they be for sale if still working?!

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Belated thanks to those people who offered a solution, no further with it yet, but it's coming up winter now so looks like springtime job for my local Landyman.

rasheed said:

Relative to the car, the cold air is supposed to blow (roughly) straight down the cabin. However once the air leaves the vent it is now travelling on its given trajectory and as you rotate the the car and change its trajectory that "packet" of air current that was aiming for the rear windscreen now finds itself aiming at say one of the b pillars.

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Interesting...............

So if you drive fast enough round a roundabout the driver (in a RHD car) will suffocate, because all the air will migrate to the left hand side of the car?

Pete

rasheed said:

No Peter dear, he will not suffocate because air will circulate around a closed comparment and though there may be areas of slightly higher or lower pressure due to radial momentum, that other force, atmospeheric pressure will act to "arbitrage" the differences.

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Lifting face shield..."Who is this so wise in the ways of science?"

No Peter dear, he will not suffocate because air will circulate around a closed comparment and though there may be areas of slightly higher or lower pressure due to radial momentum, that other force, atmospheric pressure will act to "arbitrage" the differences.

actually, sorry, the correct answer to your question is "yes". if you can get him to go around fast enough. my bad!

WSR, "I am Arthur"

wierd how your post slipped in before mine. was it because i was editing.

rasheed said:

WSR, "I am Arthur"

wierd how your post slipped in before mine. was it because i was editing.

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Don't know. Confused me...which ain't hard to do.

As a respected Thermodynamicist and Engineer , I am not even going to dignify some of the posts in this thread with an answer....

Insult to common sense I am affraid....

Inertial refrences, vector and trajectory....for a vehicle that has integral blower fans that will accelerate air releative to itself (the fans are moving at the same speed as the vehicle - as they are built into it after all...!!!).

To include those theories, the vehicle would nee dto be travelling at a speed hugely unattainable in a RR...

The effect of turning the vehicle will have little effect due to velocity of the fan blown air relative to the vehicle speed.

Saint.V8 said:

As a respected Thermodynamicist and Engineer , I am not even going to dignify some of the posts in this thread with an answer....

Insult to common sense I am affraid....

Inertial refrences, vector and trajectory....for a vehicle that has integral blower fans that will accelerate air releative to itself (the fans are moving at the same speed as the vehicle - as they are built into it after all...!!!).

To include those theories, the vehicle would nee dto be travelling at a speed hugely unattainable in a RR...

The effect of turning the vehicle will have little effect due to velocity of the fan blown air relative to the vehicle speed.

Click to expand...

Very small rocks?

Saint.V8 said:

As a respected Thermodynamicist and Engineer , I am not even going to dignify some of the posts in this thread with an answer....

Insult to common sense I am affraid....

Inertial refrences, vector and trajectory....for a vehicle that has integral blower fans that will accelerate air releative to itself (the fans are moving at the same speed as the vehicle - as they are built into it after all...!!!).

To include those theories, the vehicle would nee dto be travelling at a speed hugely unattainable in a RR...

The effect of turning the vehicle will have little effect due to velocity of the fan blown air relative to the vehicle speed.

Click to expand...

Why do you think i left it after one answer.

West Slope Rover said:

Very small rocks?

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I recognise this quote....it is about things that float.....can't remember where....no wait, From the comedic rambles of the Monty Python crew I recall....burn this thread along with the Witch, when it is proved she weighs the same as a duck...!!

And also to the Wammer.... Apart from this reply, I too shall refrain from adding anything further to this thread.

Saint.V8 said:

I recognise this quote....it is about things that float.....can't remember where....no wait, From the comedic rambles of the Monty Python crew I recall....burn this thread along with the Witch, when it is proved she weighs the same as a duck...!!

And also to the Wammer.... Apart from this reply, I too shall refrain from adding anything further to this thread.

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You, wait here and make sure he doesn't reply.

WSR - Your location indicates the USA...

Are you a Brit defector? or a born and raised US of A citizen??

I ask as you seem to have a sense of humour not commonly found among the Yanks....

Saint.V8 said:

WSR - Your location indicates the USA...

Are you a Brit defector? or a born and raised US of A citizen??

I ask as you seem to have a sense of humour not commonly found among the Yanks....

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Born and raised a 'Merkin. My sense of humor arose after I bought a Landy. It was a defense mechanism. Otherwise, I would have shot myself.

:hysterically_laughi

Now THAT'S funny.....

Maybe we all should take a leaf out of your exquisitely written, and no doubt brilliantly funny book and try to find humour in the lifestyle that is Land Rover ownership...

Saint.V8 said:

:hysterically_laughi

Now THAT'S funny.....

Maybe we all should take a leaf out of your exquisitely written, and no doubt brilliantly funny book and try to find humour in the lifestyle that is Land Rover ownership...

Click to expand...

The problem with that is that there is nothing funny 'bout Land Rover ownership. 'Tis sad, really.