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Old 09-11-2022, 09:31 PM   #1
lijbs's Avatar
Tiffin Owners Club
Ford Super Duty Owner
Freightliner Owners Club
Join Date: Nov 2013
Location: South Shore, Long Island
Posts: 92
Front slide outs wonít retract

When leaving one of the CGís, I retracted the room slides, once they were retracted I then went onto to retract the jacks. I pushed auto retract and it seemed to me that the chiming was chiming for too long. None of the jack lights went out so I went out to investigate down at the pump. HWH 725

I found out that the 40 amp fuse blew and melted the fuse holder. I opened the 4 solenoids and retracted the jacks. At first I mistakenly opened the two solenoids for the slides. I went to Advance Auto in picked up a new holder and a couple of 40 amp fuses. When I replaced the fuse holder I noticed after manually retracted the jacks that there was a puddle of hydraulic oil in the compartment. I cleaned it up and closed the valves.

Now the jacks extend and retract but the slides opened but I couldnít get them to retract. BTW the slides almost opened by themselves but now that they are opened I canít seem to close them.

The question isÖ.. Is there a priming process that must be done since I had opened the slide solenoids? Iím hoping that is the case! Otherwise how do you close up? These are pretty big slides on the 40AH I hate to think it would be all muscle. TIA
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Old 09-12-2022, 09:27 AM   #2
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Have you tried removing the gray plug on the top of your hydraulics and reinsert? It has a plastic clip on the top you have to pull and then it releases the plug. I have a 2021 40IH and had to do this last week, neither of our two large hydraulic slides would move. The jacks would not move either, tried to manually lift the coach and jack didn’t move. So we new it was hydraulic related. Removing the gray plug and then pushing it back in seemed to reset or sync back up. Slides came in and jacks stored when I hit auto store.
2021 Tiffin Phaeton 40 IH
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Old 09-12-2022, 10:59 AM   #3
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What year is your coach? Make sure the solenoid valves are closed properly and have not been damaged. Check the fluid level as well. It sounds like the solenoids are still open.
Makes me wonder if one is not bad and that caused the fuse to blow.
Also as mentioned, try a reset.
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Old 09-13-2022, 07:43 AM   #4
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All set!

Well, you nailed it! On the rear of the pump there are 6 solenoids not 4 as I thought. My HWH manual didnít supply information on the pump unit other than showing schematics of the jacks nothing about the slides.

Apparently when trying to get the jacks to retract, I must have reached around the back and opened the slide room retract solenoids. The room extender valves are facing out towards you, and the two retract valves are in the rear down low.

I called Corey Davis at Tiffin and we were able to ferret out the problem. Thanks for all your suggestions. Iím still going to bring the coach in for service to see what caused the increase in the current draw to blow the 40 amp fuse.
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Old 09-13-2022, 08:02 AM   #5
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It was mentioned "the 40 amp fuse blew and melted the fuse holder"... cannot happen in that order.
Once the fuse would open, then there is no more current flow. So most likely what happened is there is a substantial amount of current flowing through the fuse/holder and any corrosion or dirt causes resistance and with the higher current causes heat. So the fuseholder may have been 'melting' for awhile, creating more resistance/heat that caused the fuse to melt... that is also what the fuse link does when excess current flows through them, they melt.
Still check the current draw, but I suspect all will be fine.
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slide, slide out

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