Another noobie question.

specta wrote:

When I plug into 110v it automatically switched from LP to 110 but I can manually switch it back to LP.

Mine did the same.

Kayteg1 wrote:

The main problem on Dometic 3-way is that it is having automatic between LP and 120V, who can't be overridden ????, when 12V require manual switching.

When I plug into 110v it automatically switched from LP to 110 but I can manually switch it back to LP.

Or did I misunderstand your statement?

I just went out and unplugged my camper from 110v and shut off the LP, it did not switch to DC by itself but my camper is older, I wouldn't doubt that the newer ones do.

I always travel with my fridge running in LP. Its on the opposite side of the truck's the fuel door so I never worry about it.

It I were to travel through tunnels where they require you to shut them off I would most certainly do that and switch it to DC until I exited the tunnel.

gitpicker2009 wrote:
Mine automatically selects which source to use. If plugged into shore power, or driving, the DC option runs, when I'm boondocked, it selects propane. You can override it manually and choose, but I don't.

That sounds horrible. DC/LP that defaults to running down your batteries while you're driving.

How does it know if you're driving or parked? Motion sensor?
If you stop at a gas station, does it immediately try lighting the LP flame while you're pulled up to the pump?

I think your confused or didn't state how it works clearly...

^ Weird, both my old Dometics in mid 2000's model campers switched automatically between all 3 modes, in the correct priority.
AC was first priority if it sensed 120V power, then switched to LP automatically if no 120V and when the flame would blow out sometimes running down the highway, it would kick to 12V power. Just like clockwork.

gitpicker2009 wrote:
Mine automatically selects which source to use. If plugged into shore power, or driving, the DC option runs, when I'm boondocked, it selects propane. You can override it manually and choose, but I don't.

What model is it?
The main problem on Dometic 3-way is that it is having automatic between LP and 120V, who can't be overridden, when 12V require manual switching.
That leads to situation that when you pull 120V supply with propane off at the tank, the fridge will keep on sparking for few minutes before going into limp and will not switch to 12V on its own.
I tried to rewire the switches, but they are soldered to computer board, what makes it above my skill level.
At the end I put a relay on fridge main 12V supply, who is activated by ignition, so fridge runs on 12V only when alternator is charging.
Than manual switch to turn it on when solar charging or 120V is available.

Mine automatically selects which source to use. If plugged into shore power, or driving, the DC option runs, when I'm boondocked, it selects propane. You can override it manually and choose, but I don't.

People will do what people do.

When I had my TC's, I would fill the diesel (all components and appliances off) a day or two before heading out.

Then at home, I would pre-cool the fridge on shore AC and pre-heat the water heater. When I was ready to travel, I would shut down the water heater for travel as it seems to retain the heat pretty well.

Depending on time of distance travel, I would generally not turn on the fridge while traveling. It seemed to keep stuff cold for a 3-4 hour travel if not opening the fridge door.

Sometimes I would travel with LP fridge going but ALWAYS turned it off before approaching the pumps. The water heater and fridge were right close to the fuel door and for the sake of safety, the extra 20 minutes or so to LP down and then LP up was not too much a price to pay for taking prudent precautions.

Kayteg1 wrote:


Again, this is not just about blowing gas station.
CA bridges don't have propane restrictions, but lot of other states require propane off at the tank for tunnels, ferry and train rides.
That beside the accidents like I pictured before.
Those things do happen and happen often when you travel around.

the only time I turn mine off is where I find thoes restrictions, for example uphere you have to turn your propne tanks off and put a tag on them for the ferry, but thats the only time I turn mine off and it gets turned on right away again when I am off.

Steve

adamis wrote:


I'm no expert and haven't been around as long as some of the old timers on this board but I have to think the number of times a camper fridge flame caused an explosion at a gas station is probably close to zero and likely because something else was significantly wrong unrelated to the camper.

Again, this is not just about blowing gas station.
CA bridges don't have propane restrictions, but lot of other states require propane off at the tank for tunnels, ferry and train rides.
That beside the accidents like I pictured before.
Those things do happen and happen often when you travel around.