My propane alarm went off screeching when I was driving down the highway. I had just been through a snarl and was now coming up to speed. I pulled over immediately, calling 911, thinking it was the fire alarm. I prepared to do battle, as right before the propane alarm went off, I smelled something funny, then saw a poof of smoke at the same time the alarm sounded.
The fire department showed up, I told them how embarrassed I was that there was odor, then smoke, then alarm, but I could find no fire.
By then I had discovered it was the propane alarm and not the fire alarm that went off. The fire department's heat sensors determined super hot heat at my front right tire and suggested the brake calipers might have stuck while I was in the traffic snarl. Sure enough, a tow to a repair shop, and I had a stuck brake caliper. The propane tank was behind the front right tire, when it sensed the increase in heat near the tank, it set the propane alarm off.
I had no idea the propane alarms were set to go off if your propane tank became hot, but mine sure did.
If yours is just beeping, well mine beeps a few times, when I first turn mine on. Mine is generally on all the time, but I tend to knock it off by accident, when I am sweeping, (mine is close to the floor) or if the 24/7 blinking light is annoying me and I'm not using propane. Anyhow, that almost sounds like a wire jiggling loose that is making it turn itself back on again, then it beeps like mine does when it first starts up.
If you're only going down the road for a few short hours, you can leave the propane off, and the fridge doors firmly shut and not use the propane fridge at all. A penny pinching friend taught me this. I keep a thermometer in my fridge, I have left it off for hours, without opening the door, only to find the temperature barely changed at all. Mainly, I have left my fridge off, when I've parked at an angle, (less than level) somewhere to go shopping or go visiting. (Fridges like to be level when they are running!)