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Post by SandLapper on Jun 6, 2020 20:11:10 GMT -5
Anyone with a 3560 had to replace the high pressure switch on their Marine Air AC unit or had to remove the whole unit for service? My pressure switch is bad and I've got to figure a way to get to it or get the unit out. Any suggestions appreciated.
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Post by gofast24 on Jun 7, 2020 9:48:12 GMT -5
How do you know the HP switch is bad? Then, to replace it you have to remove it which will let all your refrigerant evacuate! Get a good marine HVAC tech go to boat and determine the cause of the problem. if it is actually a HP switch he will still have to first recover all the refrigerant from the system, remove and replace switch, pull a vacuum on the system, and then fully recharge with refrigerant. Don't believe this is a DYI project.
PS: How are your VP 8.1GxiI-D doing and how many hours on engines? We are at approx. 1000 hours and only problems were water in fuel.
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Post by SandLapper on Jun 9, 2020 19:49:42 GMT -5
My HVAC guy diagnosed the switch and he will be doing the repair which isn't that bad of a job according to him. The problem is getting to it.
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Post by gofast24 on Jun 10, 2020 9:55:35 GMT -5
OK, how much will it cost you for that not bad of a job? Just curious.
Also, previous y asked, how are your VP8.1 GSiI-D's doing?
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Post by SandLapper on Jun 11, 2020 19:29:25 GMT -5
He said about half day job so, 400-600 bucks or so.
My GXI's have been pretty good. I've replaced the manifolds and risers twice in the last 7 years, replaced the water pumps once and rebuilt them once (rebuilding them myself was like 45 per pump vs 300ish each for new ones). Other than that, just standard maintenance stuff. I also installed engine gateways this year to get engine data to my new nmea2k network. Engines only have 320ish hours on them.
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Post by gofast24 on Jun 12, 2020 10:08:57 GMT -5
Pricey but what other choice do you have with this repair, a lot of semi expensive equipment required and someone that knows what they are doing.?
thanks for info on the 3560! Not many hours on the engines, that averages to 22 hours/year.
How often have you replaced sea water pump impellers? We have had a rash of impeller failures (around 50 hours each) using aftermarket cheep replacement impellers! Finally woke up and ordered 2X VP OEM kits ($54 each thru Amazon), impeller in OEM kit indicates made in Hungary (or thereabouts). Two failed impellers taken out only showed "made in China"? Aftermarket kit about $22, VP OEM kit $52 but learned my lesson again! You get what you pay for (to a point)
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Post by SandLapper on Jun 13, 2020 20:51:58 GMT -5
I replace the impellers every year, regardless of use and have not had one fail. I've only ever used VP impellers though. Yeah, I'm ok with aftermarket filters and such, but typically stick to OEM on most engine stuff.
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Post by gofast24 on Jun 14, 2020 10:46:06 GMT -5
Be careful with aftermarket fuel filters. The VP OEM filter is rated 6 microns, all aftermarket ones I have investigated are rated 8 microns. If gasoline engines and high pressure fuel pumps the 2 micron difference could end up costing a lot of money. OEM filter only $2 more than not to spec aftermarket filter.
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Post by SandLapper on Jun 15, 2020 21:44:06 GMT -5
Good news. HVAC tech was able to put in a tee on the high pressure side, and put in a new high pressure switch, bypassing the bad switch (without the need to remove the unit). All working good and for $75 bucks!
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Post by gofast24 on Jun 16, 2020 9:53:44 GMT -5
As the high pressure switch is in the discharge (liquid) refrigerant line out of compressor how di he add a "T" to bypass the bad high pressure switch and install a new one where??
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Post by SandLapper on Jun 16, 2020 14:18:43 GMT -5
No idea. All I know is what he texted me for now. When I get back to the boat I'll be able to look at it.
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Post by gofast24 on Jun 17, 2020 8:20:38 GMT -5
Good news is the original $400-$600 pricing you indicated turned out to be $75.
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