Coachman Laser water problems

Claude1
Claude1 Forum Participant Posts: 1
edited May 2021 in Caravans #1

Hi

i have a coachman laser with a whale on board cold water tank, truma barrel pump, and a separate control panel.  The pipe work includes a pressure sensor and solenoid valve.  

The issue I have is that the pumps rapidly switch on and off, creating a clicking noise which seems to come from the solenoid valve. The strange thing is that the clicking from the solenoid happens even if I disconnect the wires from the solenoid. I have already replaced the pressure switch but still have the same issue.

The solenoid is fitted with the direction of flow towards the on board tank. The pressure switch is installed in a bypass pipe around the solenoid, also with a direction of flow towards the on board tank.

I’m at a loss as to what the issue is, not helped by the fact that I can’t understand how the system is supposed to work. Any suggestions would be appreciated.

TIA

Mark

 

Comments

  • EmilysDad
    EmilysDad Forum Participant Posts: 8,973
    1000 Comments
    edited May 2021 #2

    I'll look at mine tomorrow 👍

  • EmilysDad
    EmilysDad Forum Participant Posts: 8,973
    1000 Comments
    edited May 2021 #3

    Just looked at the set up in my Laser .... it's exactly the same. I've never looked in the 3 or 4 years we've had the caravan 😳 but like you, I can't really see how it's supposed to work .... though mine does. I have just noticed though that you can tweak the pressure switch with the turn screw on top.

    Do you have the same problem with both internal or external tank?

  • Extugger
    Extugger Forum Participant Posts: 1,293
    1000 Comments
    edited May 2021 #4
     

    Sounds like you need to adjust the pressure switch. I had a similar problem:

    https://www.whalepumps.com/rv/siteFiles/resources/docs/resource-library/WhaleAdjustingyourpressureswitchb.pdf

    Also a video on You Tube:

    https://www.youtube.com/watch?v=P-OUJQdsV9w

    These pressure switches are voltage sensitive, which is why sometimes you can go months (especially if you visit the same sites) without needing to adjust it.

    If your lights "flicker" when the pressure switch cuts in, ask your dealer to fit a suppressor. That alone is often enough to solve the problem.

     

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