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Old 10-08-2011, 12:25   #1
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Air Conditioning Cutting Off

My onboard Air Con works part time. it will run for hours and then the compressure stops and starts off and on. Any ideas? Low gas? low voltage?
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Old 10-08-2011, 12:32   #2
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I am no expert but it may be that it is freezing up and restricting the airflow causing it to overheat and shut down to cool.
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Old 10-08-2011, 12:33   #3
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Re: Air Conditioning cutting off.

need more information like manufacturer is it air cooled or water cooled? on board like a built in or is it tucked in the hatch. 110 or 12v.could be thermal switch on compressor or high pressure switch. does it do this mid day high heat load or randomly after working fine.
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Old 10-08-2011, 12:34   #4
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Re: Air Conditioning cutting off.

Well, other than the obvious- the thermostat is turned up high and it is being satisfied and turning off ;-). But I doubt that is what you are saying.

An A/C can trip due to low voltage, low freon, high compresser head pressure and probably others.

Low voltage can be checked with your panel meter, but I doubt that is the problem.

Low freon can be checked by feeling the return freon line to the compressor. It should be cold and sweating. If it is at room temperature then it may be low on freon.

High head pressure is usually due to heat exchanger fouling. Check that you are getting a good stream of water out of the hull thruhull fitting. If not then clean your heat exchanger. If that is your problem, post and I will outline a procedure.

David
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Old 10-08-2011, 12:47   #5
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Re: Air Conditioning cutting off.

If you have moved from a location where the water temp. was lower than your present location or if the water at your location has warmed significantly then you may have to much coolant in the system and some may have to be removed.
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Old 10-08-2011, 13:43   #6
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Re: Air Conditioning Cutting Off

Anytime we heel over we know we will have to bleed the airconditioner between the water pump and the unit to get air pockets out. Water won't flow. We just disconnect the hose on the OUT of the water pump while the water pump is running and then put it back on. It's a pain, but works.

Might be your problem...Air in the line blocking the flow
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Old 10-08-2011, 15:56   #7
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Re: Air Conditioning Cutting Off

Thanks for all your help, I think I found the problem, the intake seems to be blocked, no water coming in. Lots of jellyfish in the water.
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