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thermostat for marineair 3 knob control

Discussion of AC's, plumbing and sanitation related issues.
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sep4086
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thermostat for marineair 3 knob control

Postby sep4086 » January 11th, 2018, 5:46 pm

I have a 1990 santego 3867 and I need a new thermostat that mounts on the 3 knob control. Anyone know where I can purchase one and what it will cost?

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SplashyLady
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Re: thermostat for marineair 3 knob control

Postby SplashyLady » January 12th, 2018, 10:07 am

You may find you are better off to just upgrade your controls for $175: http://www.marinaire.com/Marine-Air-Con ... ck1-an.htm
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Re: thermostat for marineair 3 knob control

Postby Viper » January 12th, 2018, 7:16 pm

I agree. The electronic conversion will give you more functionality plus a digital readout which is always handy so you can set a pretty accurate temperature. The other option is to keep an eye on eBay for the original controller.

Have you tested the t-stat and confirmed that it has indeed failed?
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sep4086
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Re: thermostat for marineair 3 knob control

Postby sep4086 » January 14th, 2018, 10:03 am

I looked at the upgrade unit and I think I will keep looking for the thermostat as the easy fix.
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Re: thermostat for marineair 3 knob control

Postby Viper » January 14th, 2018, 10:40 am

Try these guys, I think there may be one part way down the page:
https://www.tampabaymarineair.com/2794.html
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Re: thermostat for marineair 3 knob control

Postby RaRa » March 12th, 2018, 10:52 am

I had my t-stat fail. I was told that the T-stat was $100 and easy enough for me to install without another service call Apparently the cold winter causes it to stay in heat only. Cabin was about 90 degrees. I am going to look for the digital replacement option as the tech told me is a better way to go until the 15 year old compressor finally dies. It is a B-O-A-T after all!
1989 Montego 3257 @ Galveston Yacht Basin

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Re: thermostat for marineair 3 knob control

Postby tomschauer » March 12th, 2018, 5:58 pm

https://www.facebook.com/baltimoremarinesalvageinc

A good source for older boat parts.
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Re: thermostat for marineair 3 knob control

Postby RaRa » March 14th, 2018, 11:11 pm

And of course the compressor really did die! Now I need to think about a new unit.
1989 Montego 3257 @ Galveston Yacht Basin
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Re: thermostat for marineair 3 knob control

Postby RaRa » March 14th, 2018, 11:23 pm

To add on to the above, is this really as simple a job as it seems? Since unit is recharged from factory, hooking up seawater in and out and running control lines in a suprisingingly accessible chase will have us cool and warm again. Any likes or dislikes as to brand of units? Prices seem to vary wildly.
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Re: thermostat for marineair 3 knob control

Postby tomschauer » March 14th, 2018, 11:46 pm

If you want a simple change out, look for a unit with the same dimensions, capacity and connections as your existing unit.
I have used mermaid and marine airr, both work well. The marine airr has more complex controls. The mermaid will work with any thermostat.

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