It's the switch for the water pump, which is used when you are not using city water - you'd fill the tank, then turn that switch on to pressurize the system and provide water when you need it.
When you flip the switch on, the pump should run for a moment to build pressure in the system (and don't worry - if it's working you should hear it), then shut off and stay off until you open a faucet. The pump is controlled by pressure - when the water pressure drops below a certain set amount, it kicks on, then when it exceeds a certain (higher) pressure, it shuts off.
A useful quirk of this system is that it's easy to test for leaks in the water system: let it build up pressure then do...nothing. If it turns on again, you have a leak somewhere. (Mine will sit for several hours before it needs to run again, so there might be a tiny leak somewhere, but I'm not going to worry about it - but if it's kicking on a couple times an hour or more, definitely start looking.)
In my '91 the pump is mounted inside the right rear door - there's a small access panel there and you can see the pump just inside.
What does the switch in the monitor panel do?
- skater
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- B190 Year: 1991
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- Location: Annapolis, MD
What does the switch in the monitor panel do?
1991 Airstream B190 - bought, 2005; sold, 2011; bought 2017
1995 Airstream Excella 30' trailer
WBCCI #13270, Washington, DC Unit
1995 Airstream Excella 30' trailer
WBCCI #13270, Washington, DC Unit