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Old 02.07.2021, 09:21
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Tips for driving in the next heat wave

It's hot out there so here's a little advice from CU on proper car AC management.
Several of them may go against presumed assumptions.
https://www.consumerreports.org/cars...utm_nsltr=cars
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Old 02.07.2021, 09:29
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Re: Tips for driving in the next heat wave

I was confused for a second when they state that the air is cooled to 38 degrees, my car can't even heat it to that!

But some fairly straight forward tips, especially the windows open at the start part, I thought that was semi common knowledge.

Another thing I've seen people do is open all the windows and then open and close the boot (trunk) lid a few times to push the old stale air out. I see little difference to driving 300m with the windows down, YL/100kmMV (YMMV).
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Old 02.07.2021, 09:35
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Re: Tips for driving in the next heat wave

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I was confused for a second when they state that the air is cooled to 38 degrees, my car can't even heat it to that!

But some fairly straight forward tips, especially the windows open at the start part, I thought that was semi common knowledge.

Another thing I've seen people do is open all the windows and then open and close the boot (trunk) lid a few times to push the old stale air out. I see little difference to driving 300m with the windows down, YL/100kmMV (YMMV).
Drive with the windows and the boot open, best of both.
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Old 02.07.2021, 09:43
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Re: Tips for driving in the next heat wave

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Drive with the windows and the boot open, best of both.
Buy a convertible for summer time, problem solved.
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Old 02.07.2021, 10:08
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Re: Tips for driving in the next heat wave

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Buy a convertible for summer time, problem solved.
It's not intuitive, but it's less hot to have no roof than having a roof and no AC. Around here, when you drive with no roof air is max 30°C. The Sun heats the roof at least 10-20°C above air temp and heat is radiated from the roof into the car interior.

But, what heat wave? Just checked meteosuisse and 24-26°C for the next few days. Or is this bragging of vacations in a warmer place?
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Old 02.07.2021, 10:16
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Re: Tips for driving in the next heat wave

drive at night.
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Old 02.07.2021, 10:22
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Re: Tips for driving in the next heat wave

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It's not intuitive, but it's less hot to have no roof than having a roof and no AC. Around here, when you drive with no roof air is max 30°C. The Sun heats the roof at least 10-20°C above air temp and heat is radiated from the roof into the car interior.
In practice though, it's the other way round. Driving a convertible in a really hot country, for long periods, is practically impossible.

Although you get the breeze, the air temperature is so hot that it's like sitting in the stream of a hot air dryer. Additionally there's the effect of the sun beating down on you all day which can really affect you.

Without AC, it's better to drive with the roof on, windows closed and every so often tip a bottle of water over your head.

That's what I've done, anyway.

Convertibles are brilliant though on cooler days and in Spring or early summer with the heater on.
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Old 02.07.2021, 12:58
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Re: Tips for driving in the next heat wave

Another top tip for driving in hot weather: keep on hand some eye drops in individual doses.

The drying effect of the temperature and the AC, plus the reduced blinking due to staring at the horizon can make your eyes dry out so much their refractive index changes. When driving through Italy during a heat wave a few years ago my eyes became so dry my vision became completely blurry (I usually have perfect vision). It was a not a great experience. Ever since then I always keep some of these in the glove box:

https://www.coopvitality.ch/fr/optav...os-0-4-ml.html
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Old 02.07.2021, 19:15
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Re: Tips for driving in the next heat wave

PRO TIP: In small engine cars when you turn it off you magically get a turbo boost performance.
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Old 04.07.2021, 10:10
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Re: Tips for driving in the next heat wave

It's key to use it from time to time to lubricate and dehumidify the whole A/C circuit and compressor ... also in winter!
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Old 04.07.2021, 11:01
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Re: Tips for driving in the next heat wave

The battery on our car recently died (the battery was quite old, so that was no surprise). But I noticed that our A/C works much better now, with the new battery.
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Old 04.07.2021, 11:13
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Re: Tips for driving in the next heat wave

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The battery on our car recently died (the battery was quite old, so that was no surprise). But I noticed that our A/C works much better now, with the new battery.
Air-con will finish off a battery that is on the way out.

That happened to us in Italy a few years ago.
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Old 04.07.2021, 11:18
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Re: Tips for driving in the next heat wave

Presume temperature quoted in the article is Fahrenheit.

Convertibles are unbearable in hot weather.

Aircon should be run for a few minutes every couple of weeks throughout the whole year rather than giving it 6 month holiday through the winter.

Stuff the back seat passengers. Recirculate stop hot air being continuously cooled.

Today's aircon systems are a big girl's blouse compared to 40 years ago. I had a Toyota Celica Supra with a primitive system that was basically "off" or "deep freeze". You cold send vapour trails through cabin from the vents in hot weather...
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Old 04.07.2021, 11:34
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Re: Tips for driving in the next heat wave

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Air-con will finish off a battery that is on the way out.

That happened to us in Italy a few years ago.
Ahhh. Maybe that's why ours died when it did then.
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Old 04.07.2021, 12:30
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Re: Tips for driving in the next heat wave

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Aircon should be run for a few minutes every couple of weeks throughout the whole year rather than giving it 6 month holiday through the winter.
I use AC all the time in winter to clear the windows.
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Old 04.07.2021, 12:39
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Re: Tips for driving in the next heat wave

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I use AC all the time in winter to clear the windows.
Indeed. If I drive alone normal ventilation is OK to defog during winter. Wife and me, I need to turn the AC to defog.
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Old 04.07.2021, 12:43
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Re: Tips for driving in the next heat wave

Wear a wet t-shirt.




Only.
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Old 04.07.2021, 12:54
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Re: Tips for driving in the next heat wave

This thread reminds me of the time we drove (in the '70s) from LA to Cuernavaca in an old Dodge station wagon that had been rolled into a gully a few years before (dashboard-push-button automatic, ha!) We wore swimsuits, kept a cooler filled with ice on the back seat, and stuffed it down our suits every hour. It was 110F when we reached El Paso, and the diff went wonky. Lay on our backs under the car once the sun went down, replacing parts.
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Old 04.07.2021, 13:19
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Re: Tips for driving in the next heat wave

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This thread reminds me of the time we drove (in the '70s) from LA to Cuernavaca in an old Dodge station wagon that had been rolled into a gully a few years before (dashboard-push-button automatic, ha!) We wore swimsuits, kept a cooler filled with ice on the back seat, and stuffed it down our suits every hour. It was 110F when we reached El Paso, and the diff went wonky. Lay on our backs under the car once the sun went down, replacing parts.
Us kids used to play with those buttons.
Mom kept a screw driver in the glove box to unlatch em.
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