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Old 12-22-2014, 05:52 AM   #1
JBP
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Vacuum Pump

I can not get the green light to come on. The pump runs and runs.
This is a new pump.
The coach has been winterized. There is antifreeze in the toilets. So i know that the seal is holding there.
When the 35K is winterized is there a valve that is left open to prevent the pump from pulling a vacuum? I thought that this was a closed system.
This is my first winter with the coach a 2014 35K.
I had he dealer winterize it the first time.
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Old 12-22-2014, 09:17 AM   #2
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I'd contact the service dept. that winterized the RV. Perhaps they pulled a hose to break the vacuum and allow toilet to be winterized. If the pump is accessible you could disconnect hose to it and blow air through it, listening for where air exits.
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Old 12-22-2014, 10:08 AM   #3
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I can not get the green light to come on. The pump runs and runs.
This is a new pump.
The coach has been winterized. There is antifreeze in the toilets. So i know that the seal is holding there.
When the 35K is winterized is there a valve that is left open to prevent the pump from pulling a vacuum? I thought that this was a closed system.
This is my first winter with the coach a 2014 35K.
I had he dealer winterize it the first time.
JBP
What does winterizing have to do with your vacuum pump?
As far as I know the only thing my vacuum pump does is generate the vacuum for the operation of the dash heat and dash A/C "vent doors".
Wondering.
Mel
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Old 12-22-2014, 11:46 AM   #4
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JBP
What does winterizing have to do with your vacuum pump?
As far as I know the only thing my vacuum pump does is generate the vacuum for the operation of the dash heat and dash A/C "vent doors".
Wondering.
Mel
'96 Safari
I guessed he has a vacuum operated toilet since he mentioned it. It would be a second vacuum pump, separate from the one in front that operates vacuum for HVAC.
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Old 12-22-2014, 02:47 PM   #5
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I guessed he has a vacuum operated toilet since he mentioned it. It would be a second vacuum pump, separate from the one in front that operates vacuum for HVAC.
Thanks BFlinn
That must a "high-tech toilet" unlike my 18 year old trouble free 18 year old SeaLand 510 "gravity flush" toilet.
BTW, it sounds like "trouble" to me, (like many unnecessarily "new" & improved" things), but it is what it is.
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Old 12-22-2014, 03:23 PM   #6
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The bath and 1/2 have one black water tank and a pump. The toilets feed to the pump and the pump pumps to the black water tank. The pump pulls vacuum on the system from the pump inlet to the toilet outlets. This let the Fleetwood engineers design a system that does not have to be sloped from the toilet to the pump inlet. I still think two tanks would have been better.
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Old 12-23-2014, 06:13 AM   #7
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Thanks for the comment. Pump is very difficult to get to. I called Fleetwood there thought was something was stuck in the pump discharge. That can not be. the pump is new and other than testing it nothing has been put through the system. I took it to the dealer and they and Fleetwood are working through it.
Fleetwood forward a piping 3D of the system. Boy is it complex.
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Old 12-23-2014, 02:38 PM   #8
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When you step on the toilet pedal, does water/antifreeze that is in the bowl get sucked down the pipe?
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Old 12-23-2014, 04:44 PM   #9
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Yes it does. I got the green light to come on after and extended period of time. Now it takes about 2 min to go from red to green.
I could not find any leaks in the system. It seems to be working.
I will head sound and hope it continues to work.
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Old 12-23-2014, 07:23 PM   #10
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Yes it does. I got the green light to come on after and extended period of time. Now it takes about 2 min to go from red to green.
I could not find any leaks in the system. It seems to be working.
I will head sound and hope it continues to work.
I remember thinking my system ran for a long time. I timed it. 30 seconds. Hope it still does so in one week.

There is a switch which detects how much vacuum exists. Since you have vacuum enough to flush, I think the switch is the problem. The system monitors low vacuum and excessively high vacuum. Might be worth a look.

I remember your posts in the past about your coach. My sympathy goes out to you. The cleanout had to be a horror.
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Old 12-27-2014, 07:26 AM   #11
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WOODYDEL
Thanks for the reminder about the switch. I have the wiring diagram. I will check it next time I have that rear bay empty. I have just finished packing it for our winter trip.
I will time it you are right it may not be running as long as I think that it is.
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