Overheating G1000

[Tracker]

I have a Ovation with G1000.  On a couple of occasions in extremely hot weather the pfd has turned off momentarily after displaying a overheat warning.  The unit fan is working.  After a bit everything works again. Have not had the problem since directing the leg cooling fan in the direction of the pfd.  Also keeping the glare sheet covered as much as is practical on the ground and in the air when it is hot.  Plan is to install an extra  fan at annual time.  Thoughts, advice?

[GeeBee]

Describe "extremely hot". What was the OAT when it shut down?

[Tracker]

First time I was too startled to notice when the pfd went blank and MFD went to revisionary mode!   2nd time.  30 deg OAT in direct sun on the ground, airborne after 10 minutes and then 14  C at 7000 feet about 10 min later in direct sun.  About 1 or 2 min in to level flight went unserviceable for about 2 min. Glare shield was almost too hot to touch.

[Ragsf15e]

1 hour ago, Tracker said:

First time I was too startled to notice when the pfd went blank and MFD went to revisionary mode!   2nd time.  30 deg OAT in direct sun on the ground, airborne after 10 minutes and then 14  C at 7000 feet about 10 min later in direct sun.  About 1 or 2 min in to level flight went unserviceable for about 2 min. Glare shield was almost too hot to touch.

Can you feel the fan output or do you just know it’s “running”?  30c oat is hot but not that hot.  Need to make sure the fan intake / output isn’t blocked somehow.  Like covered in dust/lint or maybe a scat hose jammed against the back of it?

[GeeBee]

Also that the fan is at speed. Fans often go weak or overloaded with lint and dust. Check for lint or dust build up. Its a standard part.

Google this part # CR0624HB-A70GL They are all over the web. Item 31 and 35

 

[Tracker]

Definitely know the fan is running because I touched it with my fingers while it was running. Did not expect it to have  no guard!  Did not feel slow but hard to know if it was up to speed. Did not sick my fingers into the mfd fan to compare nor repeat the pfd/finger experiment! . On ground had a look at it and not obstructed nor covered with lint.  Did not run the avionics on the ground.  Could do that to compare.  Never occurred to me  that it might be dying a slow death. Thanks for the part number. 

[carusoam]

Garmin avionics fans are known to have problems…

See how many fans the device is supposed to have (?)

It is big enough that there may be more than one?

Find Trek @TrekLawler often at BT….

 

Swapping out fans is most likely a low cost and easy fix… based on other big G avionics experience…

PP thoughts only…

Best regards,

-a-

[Tracker]

Thanks for the tips.  Does anyone know about the electrical connection (type of connector) of the fan.   Want to be prepared before taking things apart.  Part number was a great tip.

[LANCECASPER]

23 hours ago, Tracker said:

I have a Ovation with G1000.  On a couple of occasions in extremely hot weather the pfd has turned off momentarily after displaying a overheat warning.  The unit fan is working.  After a bit everything works again. Have not had the problem since directing the leg cooling fan in the direction of the pfd.  Also keeping the glare sheet covered as much as is practical on the ground and in the air when it is hot.  Plan is to install an extra  fan at annual time.  Thoughts, advice?

All of the comments have been good. It's been hot everywhere this summer and yours seems to be the only one on this forum with the problem. The fan(s) can only move the air available. So it's either the fan(s) or an obstruction of some kind.