I've recently had trouble with my water pump cycling on and off when I wasn't using any water. I remember the switch below the sink as being a 2-position rocker sw. When I tried to turn it to the off position it sprung back( like a "hold down" sw.) I decided the problem must be the sw so I tried replacing it. After removing the sw the pump still cycles.
Does anybody have any ideas or have you replaced the sw?
Dick Lokar----------I'm new at the forum so I hope I'm following the correct protocol for new posts.
Welcome!
You'll have to check your wiring diagram to see if the switch is controlling a latch relay (press and release...momentary on) or a simple SPST switch. My 2002 U270 had the simple switch until I modified it to the relay so I could turn it on from each place there is water (both sinks and external bay).
In my year, FT put latching relays and multiple switches in the U320, but not the U270.
But to your point, if the pump keeps cycling, it sounds like either a water leak in the system or a defective pump that won't maintain pressure internally. I've had both happen over the years.
I agree with Brad.
All the switch, relays, etc do is supply 12 VDC to the pump. The switch on the pump determines if/when the pump operates.
You either have a water leak, bad check valve in the pump or bad pressure switch on the pump.
Brett
Toilet leak
Related to this solution is the water fill check valve. If it doesn't seal properly it will cause the pump to cycle.
jor
That is what you U320 owners get to experience. Us lowly U270 owners don't get that as standard...LOL.
You may not have a manual fill valve but if ours is not all the way closed, the pump will cycle.
Anytime there are two or more switches to operate a pump, etc., a latching relay is used and the switches are momentary. Our U300 uses a VW headlight latching relay to do the work. Part number 111941583. A little over $80 new but available frequently as NOS (new old stock) for less than $20 on ebay. Plastic body Chinese clones are also less than $20 but mount with a plastic tab and the connectors face down instead of out. Other relays may have connectors in the same place but unless they are latching, they won't work (have you keep your finger on the button to run the pump).
Pierce
I guess mine was upgraded by previous owner, that's exactly how mine works. The relay is the same model as the one that is used on the overhead light. When my check valve went bad I had the same symptom of pump running that tipped me off. On mine the check valve is part of the water inlet. Good luck!
Dumb Question.... Another owner here was diagnosing a problem and he has a 270. The question was " Did FT produce any 270's in 40 foot length, or are they all 36's ? "
I don't think I have ever seen a 40 foot 270 but that doesn't mean anything.
Gary B
Our 99' U270's is controlled by a single switch near the kitchen sink that operates a latching relay. I plan to put in another in the bathroom. The original switch plates are no longer available unfortunately... Anybody have any they would be willing to part with? I would be interested in singles, doubles, triples, quadruples... Whatever!
Gary, I have seen 40' U270's listed at MOT but never in person so probably not common.
Don
Edit: fofumer Maz (Mark) has a 99' 40' U270 CAI
That was one of my Fall projects. I now have a switch (and light) in the original bathroom location (must have changed from 1999 to 2002, with FT thinking the bathroom was a better location than kitchen)...as well as one at the kitchen sink and one at the outside utility bay...each with lights. The funniest part was that on my big basement circuit board (the same one in use for ALL models, it appears as I have all sorts of circuit breakers there, including Aqua-hot, that are not connected), there was already a relay mounted there that was unused for anything. I bought one of the aforementioned VW Headlight dimmer switch latching relays, but didn't have to use it!.
Our U270 also had just one momentary water pump switch in the kitchen. We ran wires from the kitchen switch to the bath, which is on the same wall as our kitchen and wires to the front door. Any momentary single pole switch will work. RV stores that sell matching switches also usually have single, double, triple gang switch plates that are similar to OEM. We also ran wires from latching relay on bay wall to water fill area to turn on/off water pump with a Radio Shack round mounting hole momentary switch. Easy to add a LED light next to switches to show when latching relay is in closed position. Identical latching relay is available on Internet as a VW relay.
Latching relay and just one "Enable/Disable" switch w/Green "ON" LED at kitchen sink is standard on 1998 U270.
F W I W,
Neal
We got an additional switch plate and momentary switch from FT Parts to add the water switch in the bathroom.