How do you repair an airlock for a Marine Air System?

paulsivert · October 2014

I have a 06 342, The fan comes on for air conditioning but no water come out the thru hole and the system won't cycle to heat. thanks Paul

luckydog · October 2014

I had the exact same problem on my 312, if your pump runs, And your strainer is clean. I had to re-prime the line, And now it works as it should. If you keep your boat out of water make sure to shut the seacock to the A/C Before you take it out.

MarkB · October 2014

You can reprime the line by cracking open the flange to the pump a little. Not a lot! Don't want your boat to sink!

MIKES342 · October 2014

I believe if you can run a hose to your overboard discharge and put water in the discharge it will prime. It is a pain to do it by trying to purge using the strainer to make sure it is full of water. It normally will take several tries.

Dream_Inn · October 2014

I usually do what Mike stated. If you do a search, we had a good discussion on this recently...I remember MT getting a bit wet in it as well, pretty funny discussion worth reading.

Michael T · October 2014

You're way too kind DI.....MT got a lot wet! LOL MT

Lifes Good · October 2014

The easiest way is to take a hose and run high pressure water say from your dock and through your water exit from your system. You'll hear the air bubbling up from under your boat. The other is to just run your boat at cruising speed and that will blow the air out too.

luckydog · October 2014

Paulsivert, my pump is under the rear berth

JC290 · October 2014

I thought MT was posting a video on this? LOL

gslpro · October 2014

I use either the water hose to the outlet, or if you can reach it, I use a wet vac while running the unit and it primes it right up. The easiest, and most fun, way is to take the boat for a ride.

Dream_Inn · October 2014

Wow, you must be somewhere near me. What a beautiful weekend it is! Ashame the boat is away, but nice weather to help another winterize their boat. Next weekend's weather doesn't look so good, so I'll be glad all is done. So where on the South River are you?

As far as cycling for heat, you may need to program it (did it today on a buddy's 2005 342). P-1 setting needs to be either on 0 for Auto or 2 for Heat. Also check P-13 and P-15, then make sure the final P-17 is set to Nor, not Rst.

luckydog · October 2014

Mine did the same thing it ran the water up to the filter but wouldn't push it all the way to the AC, I had to prime the entire line From the AC to the pump

Dream_Inn · October 2014

Paul, is it actually in heat? does the little light where the sun is light up? If not, then you are not going to have the pump kick on because it is not warm enough to kick the a/c on. To program it, hold the power button on for ~5-7 seconds. It will then flash P-1. Use the fan button to cycle between the different settings, and use the arrows to change those settings. Just for something to try, check the first P-1 setting. If it is not at 0 (which is auto), but at 1, then you will always be in a/c, which again does not kick on when it's this cool out. (although it might tomorrow with temps in mid 70's). P-13 and P-15, along with P-17 (which needs to be nor, not rst) will also affect it. I'm pretty certain this is your issue, unless you are hearing your compressor kick on.

FYI, your pump is located port side in aft cabin under the cushion.

Welcome to the site! I keep my boat at South River Marina, but I'm sure you've seen it at your marina since I know Brian pretty well. He's done a lot of work on my boat the past couple years. I've also recommended him to many other boat owners. If you ever see me out, stop on by. At times, we've anchored out next to the little island there in the Rhode.

Michael T · October 2014

JC 290 I've been doing the household chores for three months to get the Admiral to refrain from posting that video. She tells me if I keep it up for another three months she'll give me her tablet and I can delete it. I'm not sure if I trust her to have not made a second copy, but what choice do I have? MT

JC290 · October 2014

Ah the ole black mail trick hope the apron fits lol

paulsivert · October 2014

where is this pump?

paulsivert · October 2014

Thank you to everyone for your help with this problem, we're to run the boat tomorrow on the South River I'll see if that solves the issue. Paul

paulsivert · October 2014

Hi I ran the boat on Saturday but no change in the air marine system. I don't think the pump is coming on though the fan does. Is running water through the hose at the water filter another way to see if the pump will unlock ? Paul

paulsivert · October 2014

Thank you everyone for your comments after resetting the P1 to 0 the system appears to be working just fine.

bigal6030 · June 2015

This being my first year with my boat I call an a/c tech out to the boat to perform a service on the a/c. Best $120 I spent, they cleaned the unit primed and set the thermostat to auto. I got on the boat last night and it was toasty warm inside the cabin. Very cold and wet outside.

duane.mosley · June 2015

i tried my ac for the first time last night and it pumps water, but the compressor doesn't seem to be kicking on. the fan works, but it doesn 't get cold.

Michael T · June 2015

XXX

Handymans342 · June 2015

what the heck MT?

Black_Diamond · July 2016

With the valve open for seawater, unscrew the strainer housing until the water flows into it, it will fill almost all the way up. Retighten the strainer bowl and start the A/C. It will pull it from there. I do this every time I clean out my strainer and works fine, just a few water drops to wipe up afterwards.

Liberty44140 · July 2016

X2 on @Black_Diamond process. If it still won't pump water then disconnect the output on the electric water pump until water is coming through and then reattach and tighten hose clamp. Have had an air pocket that won't give until I do that. That should get the Ac primed.

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How do you repair an airlock for a Marine Air System?

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