Fire Extinguisher (HalGuard) ok to keep in hot vehicle/AZ?

Hi Arizona peeps, wondering in this heat, considering vehicle will often be closed/locked in the sun, is it safe to keep/store a HalGuard fire extinguisher in the vehicle without danger of it exploding? What do you all normally do regarding storage of your fire extinguishers? Thanks!

 

That's a solid question. Generally speaking I keep mine in the garage and before the trip I put it in the truck. But I've forgotten about it before and have left it in there for a week and it didn't explode. They have built in safety valves that prevent explosions. I have a friend who is in law enforcement and he said he's kept one in his trunk for years in a black patrol car and has never had one explode or leak. Caveat here: those get rotated and replaced every couple of years.

 

There is a chance for the pressure relief valve to let go in extreme heat. Possiblely discharging inside the vehicle. Making for a rough cleanup. I’d try to mount outside also.

As they should be (basic monthly inspections, more thorough annuals).

Vehicle mounted powder extinguishers should be turned over and smack the bottom a few times during the monthly inspection.

Shaking and bouncing around Offroad will cause the powder to condense and compact itself and reduce effectiveness when needed.

 

i got the cheapy ones from HD and replaced them every couple of months, never had an issue with them mounted in the bed in direct sunlight in AZ summers

 

Thank you both! I did end up choosing the halon fire extinguisher because of that reason....the cleanup of a powder/chemical mess afterwards in an engine or inside the vehicle cab. But then I was concerned a gas fire extinguisher might be more volatile when enclosed in extreme heat.
I did end up getting a reply from a firefighter friend later regarding the halon extinguisher vs powder, who said "probably the gas inside doesn’t have much increase from heat. It’s pretty inert...One thing to be aware of with Halon extinguishers is that because the gas has no mass, it can be greatly affected by wind, so you’ll want to be upwind of any fire you’re trying to extinguish (a good idea anyway), and probably need to be relatively close to extinguish."
I really appreciate you both replying, thank you !!