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Old 09-28-2021, 08:53 AM   #1
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Holiday Rambler Owners Club
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2005 Holiday Rambler 40 PDQ Dash Air relay

I have no dash air, attempted to charge will not take a charge, does anyone know were the relay is, all the documents and schematics don't show it. Thanks for your help in advance.
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Old 09-28-2021, 09:13 AM   #2
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I have a 2005 Tiffin (Freightliner) and the blower for the dash air is inside the panel to the right of the stairs entering the coach. I would look their.
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Old 09-28-2021, 09:16 AM   #3
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If the compressor senses low charge it will not run, and if it does not run it won't let you charge, kind of a catch 22.

In my front drivers side run bay there is one 25 amp fuse in the larger panel and then in the #1 Monaco box, smaller mounted below, there is a AC relay and an AC circuit breaker.

I had the problem when I tried to charge my AC. Have the two gauge setup and large bottle of refrigerant. I just had to keep adding a little at a time until the compressor started. I know there is a pressure switch on my lines that controls this and you might be able to connect the two wires to fool the system into running to be able to charge it.
There should be a description in your manual that has a table showing the pressure you want to charge to, I put my high side at ~175 psi.
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