Cruiseair Reversing Valve Solenoid

Shaps

Shaps

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Nov 4, 2019
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Long Island,NY
Boat Info
2010 Sundancer 500
2015 Brig Falcon 330T
Engines
Twin Cummins QSC550 w Zeus Pods
Apologies for the cross-post from the 48DA thread, just hoping to get more eyes on this.

I started up one of my AC units and it would not generate heat. This led (from a bunch of peoples help) to either the reversing valve solenoid or a stuck reversing valve.

I tested the solenoid and found what I think is a weak magnetic pull.
My question is, how strong should that magnet be?

The unit is a Cruisair STX8C-410A 230V 8,000 btu
and the solenoid is a RANCO LDL-41
cruiseair solenoid.jpg

I hate throwing parts at an issue, but for ~$20 I am going to give it a try.

Thanks!
Shaps
 
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I have a 16k unit that is maybe 3-4 years old and the heat was never used. I also checked the solenoid and there is a magnetic pull there, but like you, not sure how strong it should be. Sometimes I can tap on the valve and it will reverse, but not frequently. Interested to see if this fixes your issue. Cruisair says if the reversing valve is constantly sticking, it will need to be replaced. If is about more cost effective to replace the whole freaking unit as mine is hell to get out.....please advise if when you change it out it fixes your issue.

Bennett
 
Shaps said:
Apologies for the cross-post from the 48DA thread, just hoping to get more eyes on this.

I started up one of my AC units and it would not generate heat. This led (from a bunch of peoples help) to either the reversing valve solenoid or a stuck reversing valve.

I tested the solenoid and found what I think is a weak magnetic pull.
My question is, how strong should that magnet be?

The unit is a Cruisair STX8C-410A 230V 8,000 btu
and the solenoid is a RANCO LDL-41
View attachment 104937
I hate throwing parts at an issue, but for ~$20 I am going to give it a try.

Thanks!
Shaps
Click to expand...
Shaps,

When we tested the suspect one on my 410's aft unit, there was no pull at all. After replacing it (with a freebie used one from my AC guy), it really sucked the screwdriver in - so I would say it was a pretty good pull...
 
bbwhitejr said:
I have a 16k unit that is maybe 3-4 years old and the heat was never used. I also checked the solenoid and there is a magnetic pull there, but like you, not sure how strong it should be. Sometimes I can tap on the valve and it will reverse, but not frequently. Interested to see if this fixes your issue. Cruisair says if the reversing valve is constantly sticking, it will need to be replaced. If is about more cost effective to replace the whole freaking unit as mine is hell to get out.....please advise if when you change it out it fixes your issue.

Bennett
Click to expand...
Will do @bbwhitejr
New solenoid comes friday (i hope) and we may need it this weekend... Fingers crossed this does it.

Edit:
@carterchapman
Thank you! Great info.
 
Shaps said:
Will do @bbwhitejr
New solenoid comes friday (i hope) and we may need it this weekend... Fingers crossed this does it.

Edit:
@carterchapman
Thank you! Great info.
Click to expand...
Where did you find just the solenoid? I ended up getting a used one from my CruisAir Tech - I never could find a new one online...
 
Welcome Carter.. Now all it has to do is fix the problem! Ha
Happy to help
 
That's a 240v solenoid, would that work on a 120v AC unit? I have a spare 12k btu cruiseair unit that the reversing valve stopped working and is stuck in cool mode. If this would fix it I would be really stoked. I too was told that it is an anchor but kept it for parts. (stupid question on my part, anyone know the 120v solenoid part number equivalent?). Thx Dan
 
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Cocktail Time said:
That's a 240v solenoid, would that work on a 120v AC unit? I have a spare 12k btu cruiseair unit that the reversing valve stopped working and is stuck in cool mode. If this would fix it I would be really stoked. I too was told that it is an anchor but kept it for parts.
Click to expand...

Not sure @Cocktail Time, but I suspect it is different
My unit is 230V and that is the identical solenoid to what i currently have.
Should be pretty easy to chase down

Maybe this one?
https://www.ebay.com/p/1954227736
 
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Cocktail Time said:
That's a 240v solenoid, would that work on a 120v AC unit? I have a spare 12k btu cruiseair unit that the reversing valve stopped working and is stuck in cool mode. If this would fix it I would be really stoked. I too was told that it is an anchor but kept it for parts. (stupid question on my part, anyone know the 120v solenoid part number equivalent?). Thx Dan
Click to expand...
Dan - On my 410, the solenoid looked like this:

https://www.ebay.com/itm/1539189982...//swurl.com/?q=ranco%20240v%20solenoid%20coil

Ranco Solenoid Coil L30-42 / L30-420000-0HQ / L30-424801-000 9827 09
 
Well.. that was a bust.
Swapped out the solenoid. No change. Of course. Forgot my multimeter. So will debug another time.
 
I have a contact at Dometic that told me yesterday that the solenoids rarely get “weak.” He says they either create a magnetic pull or not…..

Bennett
 
The tech support at dometic was super responsive. I will follow up with them once i have my meter with me and want to tackle it.
While I was hoping this was the issue, i knew it was unlikely but it was so cheap and easy i figured worth a try.
 
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