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post #1 of 37 (permalink) Old 03-23-2016, 06:39 PM Thread Starter
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Thermometer accuracy

What's up with the thermometer?

It read nine degrees higher than the weather channel app on my phone. Driving home it went down, but was still 3-5 degrees higher. I know variables are in play, but still seems off, especially the initial read.

So again, what are you all seeing and has this been an issue before (haven't searched).
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post #2 of 37 (permalink) Old 03-23-2016, 07:48 PM
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Whos to say the weather channel app is correct??? just saying

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post #3 of 37 (permalink) Old 03-23-2016, 07:59 PM
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I'm pretty sure the weather channel wont be measuring the temperature right outside your car. Also, the thermometer in the car isn't a precision instrument so it's not surprizing the two don't match.
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post #4 of 37 (permalink) Old 03-23-2016, 08:26 PM
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It's never bothered me. I noticed it once, only because I had checked the weather before leaving. Give or take a couple degrees, no big deal. I'm of the opinion that hot is HOT, and cold is COLD.
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post #5 of 37 (permalink) Old 03-23-2016, 08:30 PM Thread Starter
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Originally Posted by acebmxer View Post
Whos to say the weather channel app is correct??? just saying
I know, hence the variables comment. Also, WC was fairly close to local news reports.

Quote:
Originally Posted by AUTOSPARK View Post
I'm pretty sure the weather channel wont be measuring the temperature right outside your car. Also, the thermometer in the car isn't a precision instrument so it's not surprizing the two don't match.
I do get that, including downtown measures hotter than the suburbs due building density, concrete and heat retention...and I am talking about a suburb reading.

But 9 degrees higher at the outset with falling temperature over the ride suggests some sort of problem.

My MDX, former BMW and Passat are/were way closer to WC and local news and never started high.
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post #6 of 37 (permalink) Old 03-23-2016, 08:36 PM Thread Starter
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It's never bothered me. I noticed it once, only because I had checked the weather before leaving. Give or take a couple degrees, no big deal. I'm of the opinion that hot is HOT, and cold is COLD.
I am familiar with string theory 😊, but 9 degrees triples the margin of error!
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post #7 of 37 (permalink) Old 03-23-2016, 08:43 PM
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Yeah, you're right. I've seen what you refer to: high at the onset, settling in about 3-5 miles down the highway. Never gave it much thought. I think that sensor is located behind the grill, forward of the radiator. Or, it used to be.

EDIT: jomar: Just went out to compare. Car reads 73F, NWS reporting 71F. Give it a shot and let me know what you get.

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post #8 of 37 (permalink) Old 03-23-2016, 08:43 PM
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But 9 degrees higher at the outset with falling temperature over the ride suggests some sort of problem.
Had you driven the car at all before you compared the temperatures? The temperature sensor will be behind the front grill close to the radiator so when your stationary it's going to pick up heat from the engine. When you move, the sensor is getting hit with cold air so the displayed value drops.

To be honest, the displayed temperature is in the ball park IMO, so I wouldn't consider it to be a problem but your car is under warranty. If it's bugging you that much report it to your dealer and see what they think.
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post #9 of 37 (permalink) Old 03-23-2016, 08:51 PM Thread Starter
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Had you driven the car at all before you compared the temperatures? The temperature sensor will be behind the front grill close to the radiator so when your stationary it's going to pick up heat from the engine. When you move, the sensor is getting hit with cold air so the displayed value drops.

To be honest, the displayed temperature is in the ball park IMO, so I wouldn't consider it to be a problem but your car is under warranty. If it's bugging you that much report it to your dealer and see what they think.
No, I hadn't driven it, but started it up. I don't see it bugging me to the extent I shake my fist at the dealer, but the sensor seems misplaced...and how hard is it to put it in a place where it doesn't pick up engine heat that has to bleed off?

Don't get me wrong, I like this car, but they fell down on a couple of basic details that should be no brainers.

Thanks for weighing in!
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post #10 of 37 (permalink) Old 03-24-2016, 09:10 AM
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Woke up this morning. First thing I thought of was this post by jomar. Without having some calibrated NIST standards, we really don't know how accurate our outside temperature reading is.

If you have the time and money (or the above test equipment), give it a go. But now that he's brought it up, I'll be watching mine. And I don't really know why. Well, yes I do, too.
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Last edited by OkieRich; 03-24-2016 at 09:13 AM.
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