I have a 1967 42 Commander with (3) R22 water cooled 120 volt split system units. Have had the compressors replaced previously. I am thinking I would like to replace the complete condensing units. The original units are Marinaire 3M501F with 14,500 btu AJ1R Tecumseh compressor and (2) Marinaire 3M301 with 9,000 btu AJ14 Tecumseh compressors. I can find sources for the compressors; however, have not located a source for the complete condensing units. Any assistance appreciated. Thanks. Gerald McClure

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William,

It is time to seriously consider replacing the complete system.

There is a reason that you can't find a complete condensing unit, the R22 is no longer legal to manufacture so that the only supply is from recycled sources making the price rather ridiculous. There are substitutes but this is not current technology.

The new refrigerant for this application. Is likely R410a which operates at a significantly higher pressure requiring different evaporator coil, hoses, compressor, expansion valve, reverse cycle valves, and condensor. It will be much cheaper to just replace the old system with a new one.

You can still get individual components for repair of existing units but once you cross over to a complete condenser system, you have crossed over the cost break point and that is why your not finding what you are looking for.

Thanks, am trying to get updated Cat# from Tecumseh now. Have a good day.

Ronald Zick said:

William,

It is time to seriously consider replacing the complete system.

There is a reason that you can't find a complete condensing unit, the R22 is no longer legal to manufacture so that the only supply is from recycled sources making the price rather ridiculous. There are substitutes but this is not current technology.

The new refrigerant for this application. Is likely R410a which operates at a significantly higher pressure requiring different evaporator coil, hoses, compressor, expansion valve, reverse cycle valves, and condensor. It will be much cheaper to just replace the old system with a new one.

You can still get individual components for repair of existing units but once you cross over to a complete condenser system, you have crossed over the cost break point and that is why your not finding what you are looking for.

Ronald is correct.  It is essentially not cost effective to continue maintaining r22 units.  I just paid $400 for a 30lb jug of r22.  In 2005 that same jug cost less than $50.

Like r12 before it, it's being intentionally phased out.  First the refrigerant price will continue to skyrocket, and soon parts availability will become problematic.

I have a CruiseAir unit in the salon that died last fall (evaporator leak I couldn't pinpoint).  I bought a portable unit in for a temporary solution until I have time to rework the area for a 410a unit, knowing that the 22 phase-out was coming and it wasnt worth throwing money into obsolete equipment.

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