Heating up....shutting down

nicksdarkroom · October 14th, 2010, 06:49 AM

Quite annoying this one, I have a Desire running Froyo, when I'm using the Google Nav the phone tends to get very hot and (i assume) that upon reaching a certain temperature shuts down and re boots. Usually just when I'm totally lost! If i hold the phone in front of a vent with the air conditioning on to cool down its fine again, if i don't then once the nav is restarted it will shut down the phone again. The air conditioning trick isn't the answer as i have to sit in a freezing cold car in the middle of winter in order to use my sat nav.

Is this a fault? Would taking it back and getting a new one help??

mhotovec · October 14th, 2010, 07:18 AM

Do you have a case on the phone? If so, what happens if you remove the case? I've got one of those rubberized cases on my phone, and I take it off when Navigating, it seems to help it to run a little cooler.

Thethinker · October 14th, 2010, 07:42 AM

Found out this week that mine does the same (don't really use sat nav much at all). No case and not on charge, navigated for about 20 mins and when I went to pick the phone up it was very, very warm at the bottom, taking about 15 minutes to cool down. I put it down to, er, voodoo. ;-)

nicksdarkroom · October 14th, 2010, 08:36 AM

Nope, no case at all, I'm usually charging at the same time, but try to keep a good air flow around it.

Harry2 · October 14th, 2010, 09:18 AM

With a nav app running and charging the Desire can be very hot (up to 50 degree celcius).
But the reboot is a fault.

Harry

Rastaman-FB · October 14th, 2010, 09:40 AM

reboot happens because of everything in the cpu area is getting used and creating too much heat that the cpu cannot handle
gps, charge, usb battery connectior head, antenna, screen link etc

obviously its not supposed to do this but unfortunately it does :/

mhotovec · October 14th, 2010, 10:02 AM

Oh yeah, charging and nav is a hot combination. If I'm navigating long distances (hours of driving at a time) I'll only charge for part of the time, I'll let the battery run down by about half before I plug it back in.

sookster54 · October 14th, 2010, 10:48 AM

49C is the highest the Desire's sensor will go, reboots occur when it gets really hot, the reboot isn't a fault, it's caused by the excessive heat. I'd take the phone back. The nav app can indeed eat up resources.

Also are you by any chance using a battery you bought off ebay or something? I've bought an extended battery for my phone a decade ago which overheated and melted, gotta be careful with counterfeit batteries.

japester · October 14th, 2010, 11:04 AM

Overheating and reboots!
Depending on temp i would agree this is a fault - HTC have confirmed this to me on the phone. Mine is on the way back tomorrow. When it hit mid 30C, pop. reboot.

Tried a fac reset and all seemed well, then it did it again and then started to force close sense and I couldn't do anything.

HTC support, upon describing my fault, said "Yup, sounds broken to me, it will need a new motherboard".

2-3 weeks they reckon it will take to get back. I'm edging on the side of 3 weeks as the same thing happened to a friend of mines Desire.

PS - No one else send your phones back till mine is returned! I want no additional delays thanks!

Harry2 · October 14th, 2010, 12:34 PM

Before the Desire overheated, it cut the charging (around 50C) and the led flashes orange/green.
Therefore, in most cases, the temperature will not rise further

EDIT: The battery is the critical part.
HTC says the battery should not heat above 60C.
The CPU tolerate much more heat.
Therefore: Reboot isn't occurring below 60C

Harry

Quazar · October 14th, 2010, 01:29 PM

This happened to me too, you have to send it in for repair. The main board has to be changed. It took HTC around 2-3 weeks to return mine though :/

Rastaman-FB · October 14th, 2010, 01:37 PM

Quote:

Originally Posted by Harry2

Before the Desire overheated, it cut the charging (around 50C) and the led flashes orange/green.
Therefore, in most cases, the temperature will not rise further

EDIT: The battery is the critical part.
HTC says the battery should not heat above 60C.
The CPU tolerate much more heat.
Therefore: No reboot occurres below 60C

Harry

you are assuming its a battery heat issue
people have had devices shut down without charge

also people have blatently had reboots under 60c
as you stated it cuts the charge if battery gets above 50c so then how would it reach 60 and shutdown if its not being charged?
the cpu doesnt have a temperature reading. the outer shell is very hot to touch so who knows what its like under there.

where do you get your info from? id be interested to see evidence of what you say

nicksdarkroom · October 14th, 2010, 01:53 PM

So the consensus is a fault then. I'm not living for three weeks without my desire though!! I'll take it back to carfonewarehouse and demand a replacement.

snowmobile · October 14th, 2010, 02:03 PM

Unfortunately it sounds as if you have the hardware fault which results in this rebooting.

You could use an app such as the Battery Left Widget to monitor your battery temperature sensor. It should go up to 49.9C at least without any rebooting, so if you are experiencing reboots at temperatures lower than that then you have a fault.

Harry2 · October 14th, 2010, 02:13 PM

Quote:

Originally Posted by Rastaman-FB

you are assuming its a battery heat issue
people have had devices shut down without charge

also people have blatently had reboots under 60c
as you stated it cuts the charge if battery gets above 50c so then how would it reach 60 and shutdown if its not being charged?
the cpu doesnt have a temperature reading. the outer shell is very hot to touch so who knows what its like under there.

where do you get your info from? id be interested to see evidence of what you say

For the charge cutting issue at 50C: Ask the HTC Support, why your LED flashs orange/green

For the 60C issue: HTC safety information says for the battery ... Temperatures above 60C should be avoided, nothing about a reboot below 60C.
Therefore, a reboot below 60C is a fault.

When the temperature rises still without charging: Maybe the temperature in the car behind the windscreen is to high.

Harry

Harry2 · October 15th, 2010, 01:16 AM

Hi,

I see, there could be some misunderstanding
So I'll try to explain a little more in a summary.

The processor monitores the temperature of the battery.
The reason for this is, the processor has to protect the battery against battery temperatures above 60C.
This must be, because the battery is the most critical, the weakest part in the phone regarding heat.

Now, if the battery temperature rises to about 50C, the processor will stop the charging.
The reason for this is: Charging is hard work for the processor and it produces heat.
This heat will be eliminated, if it stops charging.

If the battery temperature increases still further, the reason is the navigation app and the ambient temperature.
(maybe high ambient temperature in the car behind the front windscreen).

If the battery temperature rises above 60C, I do not know what will happen.
It is likey the processor will shut down the phone and make a reboot.

Therefore, the processor should not reboot below 60C.

EDIT: ... and why is the battery the most critical, the weakest part in the phone regarding heat ?
Because it's Li-Ion Battery.
HTC Safety Information says: "To reduce risk of fire ore burn, do not diassemble, crush, punkture, short external contacts or cicuits, dispose in fire or water, or expose a battery pack to temperatures higher than 60C (140F)."

The limit of 60C is because of the battery, not because of the other parts of the phone.

Harry

biffa · October 15th, 2010, 02:43 AM

Desire overheating and restarting

My thread from a few weeks ago mate. It is a fault, regardless of temperatures reached. Mine was doing it using the internet whilst charging. It's the processor as opposed to the battery that gets too hot.

How old is it, I had mine replaced from O2 and the new one is fine

jackie_jagger · October 15th, 2010, 02:45 AM

these days I've noticed mine does the same but at around 40C !! the second it touches about that much *zap* restart, I use my a/c to cool it down then it boots up normal else its stuck in a reboot cycle !!

what should I do?

biffa · October 15th, 2010, 03:09 AM

Quote:

Originally Posted by jackie_jagger

what should I do?

The same as you would do if you had a ketle which didnt boil or a tv that didnt have a picture.

The Desire is 'unfit for the purpose for which it was sold' and as such should be replaced or repaired FOC depending upon age and warranty terms.

Back it up and then get it replaced

Rastaman-FB · October 15th, 2010, 03:44 AM

Quote:

Originally Posted by Harry2

For the charge cutting issue at 50C: Ask the HTC Support, why your LED flashs orange/green

For the 60C issue: HTC safety information says for the battery ... Temperatures above 60C should be avoided, nothing about a reboot below 60C.
Therefore, a reboot below 60C is a fault.

When the temperature rises still without charging: Maybe the temperature in the car behind the windscreen is to high.

Harry

its the cpu that overheats, this is why they replace the mobo.
There is also evidence that it occurs more with overclocked devices, makes sense.
its not hard for a cpu to reach 60c. a hotter battery is an indication that the cpu is getting too hot as the only temp reading you can get is the battery and its very likely the cpu is hotter than the battery itself and likely to be over 60deg

i think you are missing the point, you are still talking about battery when its not. the charge cycle makes the surrounding area warm/hot near the cpu. the cpu cannot cool itself because of the surrounding temperature and so it shuts down/restarts.
exactly the same as what a pc would do if you start it without a heatsink and run an intensive task

speedycolzalez · October 15th, 2010, 03:57 AM

Quote:

Originally Posted by nicksdarkroom

Quite annoying this one, I have a Desire running Froyo, when I'm using the Google Nav the phone tends to get very hot and (i assume) that upon reaching a certain temperature shuts down and re boots. Usually just when I'm totally lost! If i hold the phone in front of a vent with the air conditioning on to cool down its fine again, if i don't then once the nav is restarted it will shut down the phone again. The air conditioning trick isn't the answer as i have to sit in a freezing cold car in the middle of winter in order to use my sat nav.

Is this a fault? Would taking it back and getting a new one help??

Mine went back for repair last Tuesday for this very reason. Expecting it back in 15 working days. Currently struggling with a Nokia so old it doesn't even have a camera

ETA; that deserves a lot more

japester · October 15th, 2010, 10:20 AM

Quote:

Originally Posted by speedycolzalez

Currently struggling with a Nokia so old it doesn't even have a camera

ETA; that deserves a lot more

Ditto - I feel your pain

nicksdarkroom · October 18th, 2010, 07:06 AM

well it looks like I'm gonna have to send it back to HTC for repair and be without it for 2 weeks!!! I don't know how I'm going to cope, I'll have to rely on my crappy blackberry curve from work, aarrgghhhh!!!!